Journal of Threatened Taxa | www.threatenedtaxa.org | 26 February 2021 | 13(2): 17807–17826

 

ISSN 0974-7907 (Online) | ISSN 0974-7893 (Print) 

https://doi.org/10.11609/jott.4456.13.2.17807-17826

#4456 | Received 21 June 2019 | Final received 20 January 2021 | Finally accepted 21 January 2021

 

 

Malacofaunal inventory in Chintamoni Kar Bird Sanctuary, West Bengal, India

 

S.K. Sajan 1, Swati Das 2, Basudev Tripathy 3   & Tulika Biswas 4

 

1–4 Malacology Division, Zoological Survey of India, Prani Vigyan Bhawan, M Block, New Alipore, Kolkata, West Bengal 700053, India.

2 Department of Zoology, University of Madras, Chennai, Tamil Nadu 600025, India.

1 sksajan.sajan@gmail.com (corresponding author), 2 swtds4788@gmail.com, 3 tripathyb@gmail.com, 4 tulikabiswas30@gmail.com

 

 

 

 

Editor: N.A. Aravind Madhyastha, ATREE, Bengaluru, India.      Date of publication: 26 February 2021 (online & print)

 

Citation: Sajan, S.K., S. Das, B. Tripathy & T. Biswas (2021). Malacofaunal inventory in Chintamoni Kar Bird Sanctuary, West Bengal, India. Journal of Threatened Taxa 13(2): 17807–17826. https://doi.org/10.11609/jott.4456.13.2.17807-17826

 

Copyright: © Sajan et al. 2021. Creative Commons Attribution 4.0 International License.  JoTT allows unrestricted use, reproduction, and distribution of this article in any medium by providing adequate credit to the author(s) and the source of publication.

 

Funding: The funding for the above was through the grant-in-aid of Zoological Survey of India, Kolkata by the Ministry of Environment, Forest and Climate Change, Govt. of India.

 

Competing interests: The authors declare no competing interests. 

 

Author details: S.K. Sajan is currently working as a research fellow at the Zoological Survey of India, Kolkata and pursuing his doctoral degree from the Wildlife Institute of India, Dehradun. He is studying taxonomy, systematics, biogeography, and evolution with a focus on mollusca, mainly of the land and freshwater forms.Swati Das is currently working as a Senior Research Fellow at Zoological Survey of India and pursuing her PhD from Madras University, Chennai. Her research topic is on the ecology of Indian Horseshoe Crabs. Her research interests include ornithology, herpetology, wildlife biology, conservation biology and wildlife photography. Basudev Tripathy is Scientist-E at the Malacology Division of the Zoological Survey of India, Kolkata having more than 10 years of experience on malacological research in India. Tulika Biswas is Scientist-B at the Malacology Division of the Zoological Survey of India, Kolkata having interest in freshwater and land mollusca.

 

Author contribution: SS & BT designed the survey, SS, SD & TB  conducted field survey and specimens collection, SS & TB examined and identified the specimens, SS compiled the information, illustration, and prepared the first draft of the manuscript, SD wrote Bengali abstract, BT logistic support, manuscript editing, and all authors contributed to drafting the manuscript.

 

Acknowledgements: The authors are grateful to: the director, Zoological Survey of India for providing necessary facilities for the study; the staff of the Mollusca section of the Zoological Survey of India for their help during the material examined; the subject editor and anonymous reviewers for their constrictive comments and suggestions in improving the manuscript; and S. Das and Kamalika Bhattacharyya, scholars, ZSI for their help in Bengali translation of the abstract.  SKS and SD were supported through research fellowship from ZSI.

 

 

 

Abstract: The knowledge on the floral and faunal composition of protected areas (PAs) is crucial for formulating suitable conservation plan.  In this paper, inventory and species richness of non-marine molluscs of Chintamoni Kar Bird Sanctuary has been made and is for the first time from any PA of West Bengal.  A total of 276 specimens belonging to 22 species (10 species of land snails and 12 species of freshwater) of non-marine molluscs (land and freshwater) were collected and examined from this sanctuary.  The malacofaunal inventory comprises of nine genera under seven families among land snails and 12 genera & seven families from both gastropods & bivalves under the freshwater forms.  As far as species richness is concerned, the family Ariophantidae was found to be dominant among land forms whereas species of the families Thiaridae and Unionidae were dominant among freshwater forms.

 

Keywords: CKBS, freshwater, Mollusca, snails.

 

 

 

 

INTRODUCTION

 

The phylum Mollusca is the most diverse and ubiquitous component of ecosystem; and the second largest group of invertebrate in terms of species diversity (Lydeard et al. 2004).  Molluscs are considered environmental indicators in terms of spatio-temporal changes in a particular ecosystem or landscape (Elder & Collins 1991; Lewis & Magnuson 2000; Chlyeh et al. 2006; Thom et al. 2017).  They play a crucial role in the food chain and serve as a source of calcium for various vertebrates and invertebrates, embryonic development, eggshell formation, and osmoregulation process (Graveland et al. 1994; Graveland & van der Wal 1996; Hotopp 2002).  Being a highly diverse group in all possible habitats (marine, freshwater and terrestrial) and their ecological importance through the ecological services which they provide, study on the diversity and distribution need better understanding for ecosystem functioning.

India has 5,227 species of molluscs (6.15% of the global faunal diversity), of which 3,870 species are marine, 1,140 species are land-living, and 217 freshwater species, have been recorded from the Indian territory (Ramakrishnan et al. 2010; Reid et al. 2013; Mukhopadhyay et aI. 2017; Aravind & Páll-Gergely 2018; Sajan et al. 2019a,b, 2020; Annon 2020; Páll-Gergely et al. 2020a,b; Sajan & Tripathy 2020).  The animal diversity of West Bengal State, however, has been published in 1992 by the Zoological Survey of India (ZSI) which also covered malacofauna.  Most of the records in this study were of aquatic snails and terrestrial species from outside protected areas (PAs) (Mitra & Dey 1992; Thakur et al. 1992).  There is no documentation of malacofaunal diversity from any of the PAs of West Bengal State till date.  Thus, the present study is first of its kind in providing some baseline information on malacofaunal diversity of Chintamoni Kar Bird Sanctuary, a PA situated in the suburban area of Kolkata City in West Bengal.

 

 

MATERIALS AND METHODS

 

Study area

The Chintamoni Kar Bird Sanctuary (CKBS) is situated in South 24 Parganas District of West Bengal (22.700N & 88.666E) in the proximity of the urbanised city of Kolkata.  It is also known as Narendrapur Wildlife Sanctuary and locally known by the name ‘Kayaler Bagan’.  The sanctuary is spread over in an area of 0.7km2 and managed by the West Bengal Forest Department and under the jurisdiction of Sunderban Biosphere Reserve Range.  Being surrounded by temporary and permanent small waterbodies as well as terrestrial vegetation, this sanctuary harbours diverse invertebrates, insects, mollusca, reptiles, birds, and small mammals (Chowdhury & Chowdhury 2006; Banerjee & Talapatra 2015; Mitra et al. 2018).  In 1982, the area was proposed as a bird sanctuary by the Government of West Bengal, which later was renamed as Chintamoni Kar Bird Sanctuary (CKBS) in 2005.

 

Sampling methods and Sorting

Field collections of molluscan fauna were carried out from July to November 2017 during monsoon, post monsoon, and winter.  Direct search method was used to collect live specimens and dead shells of both land and freshwater molluscs from their natural habitats, viz.: vegetation, near water bodies, pool, inside rotten/decaying logs, on mosses, old walls, leaf litter, bushes, under the rock surface, and bamboo thickets.  Dead shells and live specimens encountered were photographed in the field (Nikon D7000 DSLR camera with 105mm macro lens) and were hand-picked for collection.  The collected materials were thoroughly cleaned in the field itself with freshwater including the live ones, preserved in 70% ethanol, labelled, and brought to ZSI laboratory for identification.  After completion of preservation and identification with labelling, the same were deposited in the National Zoological Collection of Malacology Division of ZSI.

 

Identification and nomenclature

All the specimens were examined and identified to species level based on the morphological shell characters and standard keys as provide by Blanford & Godwin-Austen (1908); Gude (1914, 1921); Preston (1915), and Mitra et al. 2004 (2005).  The nomenclature follows as suggested by Bouchet et al. (2017) for subfamily, family, and higher level systematics.

 

Acronyms and abbreviations

Art(s).—Article(s) (of the Code) | Code—International Code of Zoological Nomenclature (ICZN 1999) | fig.—figure (in cited publications) | figs—figures (in cited publication) | Fig.—Figure (in this publication) | Figs—Figures (in this publication) | leg.—legit (i.e., the collector) | NZSI—National Zoological Collection of the Zoological Survey of India | p(p).—page(s) | pl(s).—plate(s) | Reg. No.—Registration Number | sic!—sic erat scriptum (thus as it was erroneously written) | spm.—specimen | spms—specimens | ZSI—Zoological Survey of India.

 

RESULTS AND DISCUSSION

 

A total of 22 species of land and freshwater molluscs were recorded from CKBS.  Of these, 10 species were of land snails belonging to nine genera and seven families; whereas 10 species of gastropods and two bivalves belonging to 12 genera and seven families have been identified as freshwater forms.  The family Ariophantidae (n=3) was found to be the maximum, in terms of species composition among land snails, whereas in freshwater forms, Thiaridae (n=3) and Unionidae (n=2) were the dominant family inside the sanctuary.  Macrochlamys indica Godwin-Austen, 1883, Ariophanta interrupta (Benson, 1834), Indosuccinea semiserica (Gould, 1846), and Cryptaustenia bensoni (Pfeiffer, 1848) were abundantly encountered during the field surveys.  Noteworthy to mention here that, the worst invasive alien species Lissachatina fulica (Bowdich, 1822) was also recorded from the sanctuary, the source for which could be from the urban Kolkata City.  Among freshwater mollusc species, Indoplanorbis exustus (Deshayes, 1833), Filopaludina bengalensis (Lamarck, 1822), Idiopoma dissimilis (Müller, 1774), and Radix rufescens (J.E. Gray in G.B. Sowerby I, 1822) were most common species.  The riverine species Brotia costula (Rafinesque, 1833) and Tarebia granifera (Lamarck, 1816 ) were also recorded, although there is no connectivity to rivers or estuaries to this PA, but the source of their dispersal could be during monsoon, when the area gets flooded and remains temporary swampy wetland for few months.

 

Systematics accounts of land and freshwater molluscs

 

Class Gastropoda Cuvier, 1795

Order Stylommatophora A. Schmidt, 1855

Superfamily Helicarionoidea Bourguignat, 1877

Family Ariophantidae Godwin-Austen, 1883

Subfamily Ariophantinae Godwin-Austen, 1883

Genus Ariophanta Des Moulins, 1829

Ariophanta Des Moulins, 1829: p. 235, pl. 1, figs 1–5. (Subgenus).

Type species. Helix laevipes Müller, 1774 [accepted as Ariophanta laevipes (Müller, 1774)]; subsequent designation.

Distribution. Southern and southeastern Asia.

 

Ariophanta interrupta (Benson, 1834)

(Image 1A, 3C)

Helix interrupta Benson, 1834 (1832–1834): p. 461; Benson, 1834: p. 90; Pfeiffer, 1847: p. 63; Reeve, 1853 [1854]; p. 329, pl. 171, fig. 1159; Pfeiffer, 1859: p. 62; Hanley & Theobald, 1876 (1870–1876): p. 13, pl. 27, fig. 3.

Helix himalana — Lea, 1834: p. 55, pl. 19, fig. 66.

Helix himalayana (sic!) — Benson, 1834: p. 91; Benson, 1834 (1832–1834): p. 461; Pfeiffer, 1847: p. 63; Reeve, 1852 [1854]: p. 126, pl. 75, fig. 389; Brown, 1866: p. 19.

Nanina interrupta — Gray, 1855: p. 84; Pfeiffer, 1855: p. 84.

Ariophanta himalayana (sic!) — Pfeiffer, 1855: pp. 144–145.

Nanina (Ariophanta) himalayana (sic!) — Beck, 1838: p. 5; Blanford, 1863: p. 85.

Nanina (Ariophanta) himalajana (sic!) — Albers, 1850: p. 62.

Nanina (Ariophanta) interrupta — Beck, 1838: p. 5; Blanford, 1863: p. 85; Nevill, 1878: p. 19.

Ariophanta (Ariophanta) interrupta — Ray, 1948: pp. 109–110.

Ariophanta interrupta race. sacra — Annandale, 1912: pp. 33–34, figs 1, 2. (unavailable name Code, 1999: Art. 1.3.4, Art 10.2, Art. 45.5; and treats race. sacra as a synonym of interrupta)

Ariophanta interrupta — Godwin-Austen, 1880: p. 154, pl. 10, figs 1, 1a; Godwin-Austen, 1898: p. 130, pl. 34, fig. 2; Blanford, 1899: p. 283; Blanford, 1901: p. 244; Blanford & Godwin-Austen, 1908: p. 31; Annandale, 1912: pp. 33–34, figs 1, 2; Subba Rao, Thakur & Mitra, 1989: p. 254, 266–267, fig. 5A; Mitra & Dey, 1992: p. 45; Mitra, Dey & Ramakrishna, 2004: p. 228, figs C49–50; Mitra, Dey & Ramakrishna, 2005: p. 240; Ramakrishna, Mitra & Dey, 2010: p. 238; Raheem et al., 2014: p. 92, figs 56F, 57A–C; Biswas et al., 2015: p. 23, text fig.; Tripathy, Sajan & Mukhopadhyay, 2018: p. 786, fig. C; Sajan et al., 2018b: p. 145, pl. 2, fig. J; Mukhopadhyay et al., 2020: pp. 356, 360. pl. 15, fig. A.

Type locality. “near Sicrigali and the river Jellinghy (tributary of the Ganges; Godwin-Austen, 1880: p. 154), one of the mouths of the Ganges (small village in Sahibganj District, Jharkhand; 25.249028 & 87.708635)”.

Material examined. Reg. No. NZSI M.30172/7, 22.vii.2017, 40 spms., India, West Bengal, South 24 Parganas District, CKBS, leg. T. Biswas & S. Das; Reg. No. NZSI M.33307/9, 01 spm., 2.ix.2017, CKBS; Reg. No. NZSI M.33314/9, 8 spms., 24.ix.2017, CKBS, leg. S.K. Sajan.

Distribution. India (Western Ghats, Andhra Pradesh, Jharkhand, Odisha, West Bengal, and Uttarakhand) and  Bangladesh.

Remarks. Most common snail found in CKBS, however, Blanford (1863: p. 85) indicated the error in type locality as “I have but little doubt that N. Himalayana, Lea, is N. interrupta, Bens., the Himalayan locality being probably an error”.

 

Subfamily Macrochlamydinae Godwin-Austen, 1883

Genus Macrochlamys Gray, 1847

Macrochlamys Gray 1847: p. 169 — Benson, 1832: p. 76 (unavailable).

Type species. Helix vitrinoides Deshayes, 1831 [accepted as Macrochlamys vitrinoides (Deshayes, 1831)], type by monotype.

Distribution. Southern and southeastern Asia.

 

 

Macrochlamys petrosa (Hutton, 1834)

(Image 1B, 3A)

Helix petrosa Hutton, 1834: p. 83; Pfeiffer, 1847: p. 56; Benson, 1848: p. 163.

Macrochlamys petrosa Godwin-Austen, 1883: p. 96; Rensch, 1955: p. 170; Mitra & Dey, 1992: p. 47; Subba Rao et al., 1995: p. 76; pl. 19, figs 1–2; Ramakrishna & Mitra, 2002: p. 43; Patil & Talmale, 2005: p. 1913; Ramakrishna, Mitra & Dey, 2010: p. 280; Patil & Talmale, 2012: pp. 254, 285; Sajan et al., 2019b: p. 809.

Type locality. “dead, in dry ravines, and on the banks of the Ganges; living specimens at Tara, in the range of rocky hills near Mirzapúr (Mirzapur, Uttar Pradesh)”.

Material examined. Reg. No. NZSI M.34454/10, 2.ix.2017, 7 spms., CKBS; Reg. No. NZSI M.34455/10, 24.ix.2017, 5 spms., CKBS, leg. S.K. Sajan.

Distribution. India (Jharkhand, Meghalaya, Maharashtra, Uttar Pradesh, and West Bengal).

Remarks. Similar to M. indica, though not so commonly occurring.  Distinguished by more depressed shell and also being excavated around the umbilicus.

 

Macrochlamys indica Godwin-Austen, 1883

(Image 1C, 3D)

Mocrochlamys indica Godwin-Austen, 1883: p. 97, pl. 18, figs 1–8; pl. 21, fig. 7; pl. 25, figs 9, 16; Blanford & Godwin-Austen, 1908: p. 95, fig. 43; Subba Rao & Mitra, 1979: p. 15; Subba Rao, Thakur & Mitra, 1989: p. 272, fig. 6E; Subba Rao & Mitra, 1991: p. 55, pl. 8, fig. 1; Mitra & Dey, 1992: p. 46; Surya Rao & Mitra, 1997: p. 26; Mookherjee et al., 2000: p. 348; Surya Rao et al., 2004: p. 97, pl. 10, fig. 1; Mitra, Dey & Ramakrishna, 2005: p. 255, figs 218–220; Patil & Talmale, 2005: p. 1913; Mitra, Dey & Ramakrishna, 2005: p. 237; Patil, Ramakrishna & Mitra, 2006: p. 174; Ramakrishna, Mitra & Dey, 2010: p. 271; Patil & Talmale, 2011: p. 27; Patil & Talmale, 2012: p. 285; Raheem et al., 2014: p. 104, fig. 66 C–D; Biswas et al., 2015: p. 22, fig.; Budha et al., 2015: p. 21; Phung et al., 2017: p. 74, fig. 11C; Tripathy, Sajan & Mukhopadhayay, 2018: p. 792; Sajan et al., 2018b: p. 145; Sajan et al., 2019b: p. 809; Tripathy, Sajan & Sidhu, 2019: p. 110; Mukhopadhyay et al., 2020: pp. 356, 360–361, pl. 15, fig. B.

Type locality. “Calcutta (Kolkata, India)”.

Material examined. Reg. No. NZSI M.30053/7, 22.vii.2017, 1 spm., CKBS, leg. T. Biswas & S. Das; Reg. No. NZSI M.33311/9, 22.vii.2017, 7 spms., CKBS, leg. S.K. Sajan; Reg. No. NZSI M.33312/9, 2.ix.2017, 2 spms., CKBS, leg. S.K. Sajan.

Distribution. India (except the drier part of the northwestern region), North America, Europe, Africa, and southern Asia.

Remarks. Commonest species of the genus widely and abundantly occurring throughout the country including the Andaman Islands, except the dry part of the north-west.  Also, considered a pest on horticultural and agricultural crops.

 

Superfamily Pupilloidea W.Turton, 1831

Family Cerastidae Wenz, 1923

Genus Rhachistia Connolly, 1925

Rhachistia Connolly, 1925: p. 163.

 

Type species. Buliminus (Rhachis) rhodotaenia E. von Martens, 1869 [accepted as Rhachistia rhodotaenia (E. von Martens, 1869)], type by original designation.

Distribution. Eastern Africa, southern and southeastern Asia, and east of Australia.

 

Rhachistia bengalensis (Lamarck, 1822)

(Image 1D, 3B)

Bulimus bengalensis Lamarck, 1822: p. 124; Hanley & Theobald 1874: pl. 80, fig. 7.

Rachisellus bengalensis — Gude 1914: p. 274.

Rhachis bengalensis — Mitra & Dey 1992: p. 39; Mookherjee et al., 2000: p. 243; Ramakrishna & Mitra, 2002: p. 47; Mitra, Dey & Ramakrishna, 2004: p. 139, fig. C30; Patil & Talmale, 2005: p. 1913; Patil & Talmale, 2011: p. 24; Patil & Talmale, 2012: pp. 277–278.

Rachis bengalensis — Mavinkurve et al., 2004: p. 1685.

Rhachistia bengalensis — Raheem et al., 2014: pp. 69–70, fig. 39B.

Type locality. “Bengal”.

Material examined. Reg. No. NZSI M.30054/7, 22.vii.2017, 4 spms., CKBS, leg. T. Biswas & S. Das; Reg. No. NZSI M.30056/10, 2.ix.2017, 1 spm., CKBS; Reg. No. NZSI M.30057/10, 24.ix.2017, 2 spms., CKBS, leg. S.K. Sajan.

Distribution. India (Maharashtra, Tamil Nadu, Tripura, and West Bengal) and Bangladesh.

Remarks. Only three individuals recorded during survey.

 

Superfamily Trochomorphoidea Möllendorff, 1890

Family Chronidae Thiele, 1931

Genus Kaliella W.T.Blanford, 1863

Nanina (Kaliella) W.T. Blanford, 1863: p. 83.

Type species. Helix barrakporensis Pfeiffer, 1853 [accepted as Kaliella barrakporensis (Pfeiffer, 1852 [1853])], type by subsequent designation.

Distribution. Europe, Africa, southern and southeastern Asia, and Australia.

 

Kaliella barrakporensis (L.Pfeiffer, 1852 [1853])

(Image 1E, 3G)

Helix barrakporensis Pfeiffer, 1852: p. 156; Pfeiffer, 1883: p.59.

Nanina (Kaliella) barrakporensis — Blanford, 1863: p. 83.

Kaliella barrakporensis — Godwin-Austen, 1852: p. 2, 19, pl. 1, figs 1–4; pl. 2, fig. 1; pl. 5, fig 2; Blanford & Godwin-Austen, 1908: p. 258; Dey, Barua & Mitra, 1985: p. 267; Mitra & Dey, 1992: p. 47; Surya Rao et al., 2004: p. 95, pl. 9. fig. 5; Dey, Barua & Mitra, 2003: p. 139; Mavinkurve et al., 2004: p. 1685; Mitra, Dey & Ramakrishna, 2004 (2005): p. 211, fig. 174, text-fig. 49; Patil & Talmale, 2005: p. 1913; Mitra, Dey & Ramakrishna, 2005: p. 236; Surya Rao, Mitra & Dey, 2007: p. 118; Patil & Talmale, 2011: pp. 26–27; Patil & Talmale, 2012: p. 283; Raheem et al., 2014: p. 77, figs 45B–C; Budha et al., 2015: p. 19; Phung et al., 2017: p. 86, fig. 18F; Sajan et al., 2018b: p. 145, pl. 1, fig. F; Tripathy, Sajan & Mukhopadhayay, 2018: p. 791.

Type locality. “ad Barrakpore, Indiæ (Bacon) (Barrackpore, West Bengal)”.

Material examined. Reg. No. NZSI M.30173/7, 22.vii.2017, 7 spms., CKBS, leg. T. Biswas & S.K Sajan; Reg. No. NZSI M.33315/9, 2.ix.2017, 1 spm., CKBS; Reg. No. NZSI M34468/10, 24.ix.2017, 1 spm., CKBS, leg. S.K. Sajan.

Distribution. India (wide distribution range), Bangladesh, Myanmar, Pakistan, Sri Lanka, Nepal, Borneo; Europe, and Africa.

Remarks. One of the most widely occurring land snails in Asia and Africa.

 

Superfamily Achatinoidea Swainson, 1840

Family Achatinidae Swainson, 1840

Subfamily Achatininae Swainson, 1840

Tribe Achatinini Swainson, 1840

Genus Lissachatina Bequaert, 1950

Achatina (Lissachatina) Bequaert, 1950: p. 49.

Type species. Achatina fulica Bowdich, 1822 (accepted as Lissachatina fulica (Bowdich, 1822)), type by original designation.

Distribution. Worldwide distribution.

 

 

Lissachatina fulica (Bowdich, 1822)

(Image 1F, 3H)

Achatina fulica Bowdich, 1822: pl.13, fig. 3.

Helix (Cochlitoma) fulica — Férussac, 1821: pp. 1–24. (nomen nudum)

Achatina fulica — Nevill, 1878: p. 145; Gude 1914: p. 340; Phung et al., 2017: p. 71, fig. 10.

Achatina (Lissaehatina) fulica fulica —Subba Rao, Thakur & Mitra, 1989: p. 26, figs 3A–B; Mavinkurve et al., 2004: p. 1685; Patil & Talmale, 2011: p. 26; Patil & Talmale, 2012: pp. 280–281.

Achatina fulica fulica — Subba Rao et al., 1995: p. 65, pl. 13, figs 7–8; Dey, Barua & Mitra, 2003: p. 136.

Achatina (Lissachatina) fulica fulica Mookherjee et al., 2000: p. 346.

Lisachatina fulica Raheem et al., 2014: p. 115, figs 72C; Budha et al., 2015: p. 15; Sajan et al., 2018a: pp. 100–102; Inkhavilay et al., 2019: p. 49, fig. 20A.

Type locality. Unknown (‘Mauritius’, see Raheem et al., 2014: 115).

Material examined. Reg. No. NZSI M.30048/7, 22.vii.2017, 1 spm., CKBS, leg. T. Biswas & Party; Reg. No. NZSI M.34469/10, 2.ix.2017, 2 spms., CKBS, leg. S.K. Sajan.

Distribution. India (Common throughout including the Andaman & Nicobar Islands) wide distribution range in Asia, Africa, North and South America, and Europe.

Remarks. One of the 100 worst invasive alien species of the world.  Recently reported from Sagar Island (Sajan et al. 2018a).  Pest on horticultural and agricultural crops.

 

Subfamily Subulininae P.Fischer & Crosse, 1877

Genus Allopeas H.B.Baker, 1935

Lamellaxis (Allopeas) Baker, 1935: p. 84.

Type species. Bulimus gracilis Hutton, 1834 [accepted as Allopeas gracile (Hutton, 1834)], type by original designation.

Distribution. Worldwide in distribution, except the Antarctica.

 

Allopeas gracile (Hutton, 1834)

(Image 1G, 3I)

Bulimus (mithi) gracilis Hutton, 1834: p. 84, 93.

Opeas gracile — Gude, 1914: p. 355; Subba Rao & Mitra, 1979: p. 12; Patil & Talmale, 2005: p. 1913; Ramakrishna et. Alfred, 2006: p. 44.

Lamellaxis gracile — Subba Rao, Thakur & Mitra 1989: p. 260, pl. 2C; Mitra & Dey, 1992: p. 43; Subba Rao et al., 1995: p. 65, pl. 13, figs 3–4; Patil & Ramakrishna, 2004: p. 156; Patil, 2008a: p. 69.

Lamellaxis (Allopeas) gracile — Ramakrishna, Mitra & Dey, 2010: p. 180; Patil & Talmale, 2011: p. 25.

Opeas gracilis (sic!) — Mavinkurve et al., 2004: p. 1685.

Allopeas gracile — Khanna & Sati, 2003: p. 6; Rowson et al., 2010: pp. 24–25; Budha et al., 2015: p. 15; Phung et al., 2017: pp. 91, 93, fig. 20B; Mukhopadhyay et al., 2020: pp. 356, 361.

Material examined. Reg. No. NZSI M.34460/10, 02.ix.2017, 2 spms., CKBS; Reg. No. NZSI M.34461/10, 15.x.2017, 13 spms., CKBS, leg. S.K. Sajan.

Distribution. India (Common throughout), widely distributed throughout southeastern Asia

Remarks. This invasive alien species occurs very close to human habitations, on damp walls, potted plants, and gardens. The empty shell were collected from the soil.  Pest on horticultural crops.

 

Superfamily Veronicelloidea Gray, 1840

Family Veronicellidae Gray, 1840

Genus Laevicaulis Simroth, 1913

Vaginula (Laevicaulis) Simroth, 1913: p. 147.

Type species. Vaginula comorensis P. Fischer, 1883 (accepted as Laevicaulis alte (Férussac, 1822)), type by subsequent designation.

Distribution. Widely distributed in eastern & central Africa, southern & southeastern Asia, Australasia & Oceania, and North & South America.

 

Laevicaulis alte (Férussac, 1822)

(Image 1H, 3J)

Vaginulus alte Férussac, 1821: p. 14; Gude, 1914: p. 482, fig. 153; Ray, 1961: p. 275.

Laevicaulis alte — Subba Rao & Mitra, 1979: p. 10; Patil & Talmale, 2005: p. 1913; Ramakrishna, Dey & Mitra, 2010: p. 114; Patil & Talmale, 2011: p. 22; Raheem et al., 2014: p. 55, fig. 31D; Budha et al., 2015: p. 9.

Type locality. “Pondichéry (Puducherry. India)”

Material examined. Reg. No. NZSI M.30173/7, 02.ix.2017, 3 spms., CKBS, leg. T. Biswas & S.K. Sajan.

Distribution. India (Andhra Pradesh, Bihar, Delhi, Gujarat, Maharashtra, Meghalaya, Punjab, Rajasthan, Sikkim, Tamil Nadu, Tripura, Uttar Pradesh, West Bengal, Karnataka, and Kerala) and throughout the tropical parts of the World.

Remarks. Most common invasive species of slug on the Indian plains; voracious feeder on live and decaying vegetation.  Pest on horticultural and agricultural crops.

 

Superfamily Succineoidea Beck, 1837

Family Succineidae Beck, 1837

Subfamily Catinellinae Odhner, 1950

Genus Indosuccinea Rao, 1924

Indosuccinea Rao, 1924: p. 375.

Type species. Succinea semiserica Gould, 1846 (accepted as Indosuccinea semiserica (Gould, 1846)), type by original designation.

Distribution. India, Myanmar, probably in Indo-China, and the Malay Peninsula (Rao 1924).

 

Indosuccinea semiserica (Gould, 1846)

(Image 1I, 3F)

Succinea semiserica Gould, 1846: p. 100; Hanley & Theobald, 1876: p. 29, pl. 67, figs 2, 3; Gude, 1914: p. 452; Amin-ud-din, 1921: pp. 592–600, figs 21 (3a, 3b), 26, 27.

Succinea baconi — Nevill, 1878: p. 214.

Indosuccinea semiserica — Rao, 1924: p. 374; Ramakrishna, Mitra & Dey, 2010: p. 217; Patil & Talmale, 2012: p. 282.

Type locality. “Tavoy, in hortis”.

Material examined. Reg. No. NZSI M.30174/7, 2.ix.2017, 7 spms., CKBS; Reg. No. NZSI M.34451/10, 15.x.2017, 3 spms., CKBS, leg. S.K. Sajan.

Distribution. India (Maharashtra, Manipur and West Bengal), Bangladesh, and Myanmar.

Remarks. This species is commonly found in forest floors.

 

Superfamily Gudeoconchidae Iredale, 1944

Family Helicarionidae Bourguignat, 1877

Subfamily Durgellinae Godwin-Austen, 1888

Tribe Durgellini Godwin-Austen, 1888

Genus Cryptaustenia Cockerell, 1891

Cryptaustenia Cockerell, 1891: p. 99.

Type species. Vitrina planospira Benson, 1859 (accepted as Cryptaustenia succina (Reeve, 1862)), type by monotypy.

Distribution. Southern and southeastern Asia.

 

Cryptaustenia bensoni (Pfeiffer, 1848)

(Image 1J, 3E)

Vitrina bensoni Pfeiffer, 1848: p. 107.

Austenia bensoni Godwin-Austen, 1883: p. 150, pl. 36, figs 6–7.

Succinea bensoni — Patil & Talmale, 2005: p. 1913.

Cryptaustenia bensoni — Blanford & Godwin-Austen, 1908: p. 187; Ramakrishna, Mitra & Dey, 2010: p. 257.

Type locality. “In the Botanical Garden of Calcutta”.

Material examined. Reg. No. NZSI M.30236/8, 2.ix.2017, 09 spms., CKBS, leg. S.K. Sajan.

Distribution. India (Andhra Pradesh, Odisha (Eastern Ghats), and West Bengal) and Myanmar.

Remarks. This species is found on trunk, bark and on leaves; few shells collected from the forest floor.

 

Superfamily Ampullarioidea Gray, 1824

Family Ampullariidae Gray, 1824

Subfamily Ampullariinae Gray, 1824

Genus Pila Röding, 1798

Pila Röding, 1798: p. 145.

 

Type species. Helix ampullacea Linnaeus, 1758 (accepted as Pila ampullacea (Linnaeus, 1758)), type by subsequent designation.

Distribution. Asia and Africa.

 

Pila globosa (Swainson, 1822)

(Image 2A)

Ampullaria globosa Swainson, 1822: pl. 119.

Ampullaria globosa var. minor Nevill, 1877: p. 4.

Ampullaria globosa var. incrassatula — Nevill, 1877: p. 4.

Pila globosa — Preston, 1915: p. 97; Prashad, 1917: pp. 231–232, text fig. 1; Sewell, 1934: p. 56; Subba Rao, 1989: p. 58, figs 80–82; Patil & Ramakrishna, 2004: p. 146; Patil & Talmale, 2005: p. 1913; Patil, 2005: p. 440; Patil, Ramakrishna & Mitra, 2006: pp. 165–166; Ramakrishna et. Alfred, 2006: p. 43; Patil, 2006: p. 12; Ramakrishna & Dey, 2007: p. 98; Nasemann et al., 2007: p. 75, pl. 19, fig. 6, pl. 20, fig. 4; Patil, 2008b: p. 358; Raghunathan & Punithavelu, 2009: p. 149; Patil & Talmale, 2011: p. 6; Patil & Talmale, 2012: p. 257; Punithavelu & Raghunathan, 2013: p. 23; Cowie, 2015: p. 37; Basu et al., 2018: p. 12049; Tripathy, Sajan & Chandra, 2019: p. 14; Mukhopadhyay et al., 2020: pp. 355, 357, pl. 15, fig. H.

Type locality. “Rivers of India”.

Material examined. Reg. No. NZSI M.20234/8, 22.vii.2017, 8 spms., CKBS; Reg. No. NZSI M.30180/7, 22.vii.2017, 8 spms., CKBS, leg. T. Biswas & Party; Reg. No. NZSI M.34452/10, 15.ix.2017, 1 spm., CKBS, leg. S.K. Sajan.

Distribution. India (Assam, Bihar, Odisha, Himachal Pradesh, Jharkhand, Maharashtra, Madhya Pradesh, Meghalaya, Rajasthan, Uttar Pradesh, and West Bengal).

Remarks. One of the most common freshwater snail of India. Tripathy et al. (2020: p. 11, figs 8, 14) treated Ampullaria globosa var. minor as a junior synonym of P. globosa.

 

Superfamily Cerithioidea J. Fleming, 1822

Family Thiaridae Gill, 1871 (1823)

Subfamily Thiarinae Gill, 1871 (1823)

Genus Melanoides Olivier, 1804

Melanoides Olivier, 1804: p. 40.

Type species. Melanoides fasciolata Olivier, 1804 [accepted as Nerita tuberculata O.F. Müller, 1774]

Distribution. Africa, Central Asia, South and Southeast Asia, Malay-Archipelago, Philippines and various Pacific Islands.

 

Melanoides tuberculata (Müller, 1774)

(Image 2B)

Nerita tuberculata Müller, 1774: pp. 191–192.

Melania pyramis — Benson, 1836: p. 354.

Tiara (Striatella) tuberculata — Preston, 1915: pp. 15–16.

Melanoides (Melanoides) peddamunigalensis — Ray & Ray Chowdhuri, 1969: p. 48, figs 12–17.

Melanoides (Melanoides) tuberculata Starmuehlner, 1976: p. 591; Subba Rao, 1989: pp. 103–104, figs 183–184.

Thiara (Melanoides) tuberculate (sic!) — Agrawal, 1995: p. 34.

Thiara (Melanoides) tuberculatus (sic!) — Patil & Talmale, 2005: p. 1913; Ramakrishna et. Alfred, 2006: p. 44.

Thiara (Melanoides) tuberculata — Surya Rao, Mitra & Manna, 2004: pp. 41–42; Patil & Ramakrishna, 2004: pp. 147–148; Patil, 2005: pp. 441–442; Patil, Ramakrishna & Mitra, 2006: pp. 167–168; Patil, 2006: p. 14; Punithavelu & Raghunathan, 2007: p. 87; Patil, 2008a: p. 65; Raghunathan & Punithavelu, 2009: p. 149; Punithavelu & Raghunathan, 2013: p. 26.

Thiara tuberculata — Ramakrishna, Siddiqui & Sahu, 2006: p. 28.

Melanoides tuberculata — Ramakrishna & Dey, 2007: p. 161; Nasemann et al., 2007: pp. 70–71, pl. 18, figs 4, 5, pl. 20, fig. 5; Patil, 2008b: p. 358; Patil, 2008c: p. 118; Patil, 2009: p. 279; Patil & Talmale, 2011: pp. 8–9; Patil & Talmale, 2012: p. 261; Surya Rao, Venkitesan & Rao, 2013: p. 86; Biswas et al., 2015: p. 20; Tripathy, Sajan & Mukhopadhayay, 2018: p. 794; Basu et al., 2018: p. 12049; Tripathy, Sajan & Chandra, 2019: p. 14; Mukhopadhyay et al., 2020: pp. 355, 357.

Type locality. “In littore Curomandel (On the shore Curomandel) [Coromandel Coast, Tamil Nadu, India]”.

Material examined. Reg. No. NZSI M.30045/7, 22.vii.2017, 3 spms., India, West Bengal, South 24 Parganas District, Chintamoni Kar Bird Sanctuary, leg. T. Biswas and Party; Reg. No. NZSI M.34462/10, 2.ix.2017, 5 spms., India, West Bengal, South 24 Parganas District, Chintamoni Kar Bird Sanctuary, leg. S.K. Sajan.

Distribution. India: Widely distributed throughout India except Kashmir; Elsewhere: North and South Africa, eastern Mediterranean, southern China, Malay Archipelago, North Australia, Pacific Island.

Remarks. This species has a global distribution.

 

Genus Mieniplotia Low & Tan, 2014

Mieniplotia Low & Tan, 2014: pp. 15–17.

Type species. Buccinum scabrum Müller, 1774 [accepted as Mieniplotia scabra (Müller, 1774)], type by original designation.

Distribution. South and Southeast Asia, east coast of South Africa to Fiji.

 

Mieniplotia scabra (Müller, 1774)

(Image 2C)

Buccinum scabrum Müller 1774: p. 136.

Tiara (Plotia) scabra — Preston, 1915: p. 35–36.

Thiara (Thiara) scabra — Pace, 1973: p. 52; Subba Rao, 1989: p. 96; Patil & Ramakrishna, 2004: pp. 146–147; Patil & Talmale, 2005: p. 1913; Patil, 2005: p. 441; Patil, Ramakrishna & Mitra, 2006: p. 167; Patil, 2006: p. 13; Ramakrishna & Dey, 2007: p. 153; Nasemann et al., 2007: pp. 69–70, pl. 17, fig. 8; Punithavelu & Raghunathan, 2007: p. 87, pl. 4, fig. 3; Patil, 2008a: p. 65; Raghunathan & Punithavelu, 2009: p. 149; Patil & Talmale, 2011: p. 8; Patil & Talmale, 2012: p. 260; Punithavelu & Raghunathan, 2013: p. 25.

Thiara scabra — Brandt, 1974: p. 163; Neubert, 1998: pp. 350–351.; Surya Rao, Venkitesan & Rao, 2013: p. 85.

Mieniplotia scabra Low & Tan, 2014: pp. 15–17.

Type locality. “In paludofis littoris Coromandel Tranquebari Danorum maxime vulgare”.

Material examined. Reg. No. NZSI M.30051/7, 22.vii.2017, 3 spms. (1 spm., Juvenile), India, West Bengal, South 24 Parganas District, Chintamoni Kar Bird Sanctuary, leg. T. Biswas and S. Das.

Distribution. India: West Bengal, Bihar, Jharkand, Kerala, Madhya Pradesh, Maharashtra, Pondicherry, Sikkim, Tamil Nadu, Uttaranchal, Uttar Pradesh; Elsewhere: South East Asia

Remarks. This species is inhabited to coastal rivers, brackish water and stagnant water.

 

Genus Tarebia H. Adams & A. Adams, 1854

Tarebia H. Adams & A. Adams, 1854: p. 304.

Type species. Melania granifera Lamarck, 1816 [accepted as Tarebia granifera (Lamarck, 1816)], type by subsequent designation.

Distribution. South and Southeast Asia, South China and part of the Asia Pacific Islands.

 

Tarebia granifera (Lamarck, 1816)

(Image 2D)

Melania granifera Lamarck, 1816: pl. 458, figs 4a–b; Lamarck, 1822: p. 167.

Melania celebensis — Quoy & Gaimard, 1834: p. 152, pl. 56, figs 26–29.

Thiara (Tarebia) granifera — Pace, 1973: p. 62, pl. 12, fig. 3, pl. 13, fig. 4.

Tarebia granifera — Starmuehlner, 1976: p. 569, figs 72–75, pl. 16, figs 175–179; Ramakrishna & Dey, 2007: p. 168, figs. 113A–B; Patil & Talmale, 2011: p. 9; Patil & Talmale, 2011: pp. 8–9; Patil & Talmale, 2012: p. 261; Surya Rao, Venkitesan & Rao, 2013: pp. 86–87; Tripathy, Sajan & Chandra, 2019: p. 14; Tripathy, Sajan & Sidhu, 2019: p. 108.

Thiara (Tarebia) granifera — Subba Rao, 1989: p. 110, figs 212–213; Raghunathan & Punithavelu, 2009: p. 149.

 

Type locality. “Unknown”.

Material examined. Reg. No. NZSI M.30046/7, 22.vii.2017, 7 spms., India, West Bengal, South 24 Parganas District, Chintamoni Kar Bird Sanctuary, leg. T. Biswas & S. Das.

Distribution. India: West Bengal, Madhya Pradesh, Bihar; Elsewhere: South Africa, Madagascar, Malaysia, Philippines, Formosa and Pacific Islands.

Remarks. This species has been introduced into U.S.

 

Family Pachychilidae Fischer & Crosse, 1892

Genus Brotia H. Adams, 1866

Brotia H. Adams 1866: p. 150.

Type species. Melania pagodula Gould, 1847 [accepted as Brotia pagodula (Gould, 1847)], by Monotype.

Distribution. Indian subcontinent, Indo-China, Malaysia, Malay-Archipelago and Philippines.

 

Brotia costula (Rafinesque, 1833)

(Image 2E)

Melania costula Rafinesque, 1833: p. 166.

Brotia costula costula — Brandt, 1974: p. 181, pl. 13 figs 37–38; Nesemann et al., 2007: pp. 72, pl. 18 fig. 1.

Brotia (Antimelania) costula — Subba Rao, 1989: p. 108; Hatter et al., 2004: p. 4; Punithavelu & Raghunathan, 2007: p. 87; Punithavelu & Raghunathan, 2013: p. 26.

Brotia costula Benthem Jutting, 1956: p. 374, fig. 76; Köhler & Glaubrecht, 2001: p. 284, fig. D, p. 295, 297, fig. 10A–H; Köhler & Glaubrecht, 2006: pp. 159−251; Budha, 2016: p. 41, fig.; Basu et al., 2018: p. 12049.

Type locality. “Gomti River [Gomti river, Jabalpur, Madhya Pradesh, India]”.

Material examined. Reg. No. NZSI M.30047/7, 22.vii.2017, 5 spms., India, West Bengal, South 24 Parganas District, Chintamoni Kar Bird Sanctuary, leg. T. Biswas & S. Das.

Distribution. India: West Bengal, Assam, Arunachal Pradesh, Bihar, Madhya Pradesh, Manipur, Meghalaya, Mizoram, Nagaland, Uttar Pradesh.  Elsewhere: Bangladesh, Nepal, Thailand, Myanmar, Lao, Cambodia, Vietnam and Malaysia.

Remarks.  Mainly found in fast following water in streams and river, also recorded from ponds.  In CKBS, the dead shell have been collected from small pond.

 

Superfamily Viviparoidea Gray, 1847

Family Viviparidae Gray, 1847

Subfamily Bellamyinae Rohrbach, 1937

Genus Filopaludina Habe, 1964

Filopaludina Habe, 1964: p. 48.

Type species. Paludina bengalensis Lamarck, 1822 [accepted as Filopaludina bengalensis (Lamarck, 1822)], type by original designation.

Distribution. South and Southeast Asia.

 

Filopaludina bengalensis (Lamarck, 1822)

(Image 2F)

Paludina bengalensis Lamarck 1822: p 174.

Vivipara bengalensis — Preston, 1915: p. 83; Annandale, 1920: p. 113; Annandale, 1921: p. 267; Ramakrishna et. Alfred, 2006: p. 44.

Vivipara bengalensis race bengaiensis — Annandale & Sewell, 1921: p. 270, pl. 1, figs 1–3.

Bellamya (Filopaludina) bengalensis — Brandt, 1974: p. 20; Nasemann et al., 2007: pp. 73–74, pl. 19, figs 2–3, pl. 20, fig. 1.

Bellamya bengalensis form. typica —Subba Rao, 1898: p. 45; Patil & Ramakrishna, 2004: pp. 143–144; Patil, 2005: pp. 439–440; Patil, Ramakrishna & Mitra, 2006: p. 164; Patil, 2006: p. 11; Patil, 2008a: p. 64; Patil, 2008c: p. 116; Patil, 2009: p. 277; Patil & Talmale, 2011: p. 1, 5; Patil & Talmale, 2012: pp. 249, 255; Surya Rao, Venkitesan & Rao, 2013: p. 79.

Bellamya bengalensis form bengalensis — Patil & Talmale, 2005: p. 1913.

Bellamya bengalensis — Punithavelu & Raghunathan, 2007: p. 86, pl. 4, fig. 1; Patil, 2008b: p. 357; Raghunathan & Punithavelu, 2009: p. 149; Punithavelu & Raghunathan, 2013: pp. 22–23; Basu et al., 2018: p. 12049.

Filopaludina bengalensis — Mukhopadhyay, Tripathy & Ghosh, 2017: p. 503; Tripathy, Sajan & Chandra 2019: p. 14; Tripathy, Sajan & Sidhu, 2019: p. 108, fig. I; Mukhopadhyay et al., 2020: pp. 355–356, pl. 15, fig. F.

Type locality. “dans les rivières du Bengale”.

Material examined. Reg. No. NZSI M.30049/7, 22.vii.2017, 5 spms., India, West Bengal, South 24 Parganas District, Chintamoni Kar Bird Sanctuary, leg. T. Biswas and S. Das; Reg. No. NZSI M.34459/10, 2.ix.2017, 24 spms., India, West Bengal, South 24 Parganas District, Chintamoni Kar Bird Sanctuary; Reg. No. NZSI M.34453/10, 9.x.2017, 10 spms., Chintamoni Kar Bird Sanctuary, leg. S.K. Sajan.

Distribution. India: distributed throughout the India.

Remarks. One of the commonest species of South East and South Asia.

 

Genus Idiopoma Pilsbry, 1901

Idiopoma Pilsbry, 1901: p. 189.

Type species. Vivipara hendazensis Pilsbry, 1901 [accepted as Idiopoma dissimilis (O. F. Müller, 1774)], type by original designation.

Distribution. South and Southeast Asia, North America.

 

Idiopoma dissimilis (Müller, 1774)

(Image 2G)

Nerita dissimilis Müller, 1774: p. 184.

Bellamya dissimilis Subba Rao, 1989: p. 48. figs 64–67; Surya Rao, Mitra & Manna, 2004: p. 40; Patil & Ramakrishna, 2004: p. 145; Patil & Talmale, 2005: p. 1913; Patil, Ramakrishna & Mitra, 2006: p. 165; Ramakrishna, Siddiqui & Sahu, 2006: p. 28; Ramakrishna, Mitra & Aravind, 2006: pp. 9–10; Ramakrishna & Dey, 2007: pp. 90–91, taxt-figs 50A-B; Punithavelu & Raghunathan, 2007: p. 86, pl. 4, fig. 2; Patil, 2008a: p. 64; Patil, 2008b: p. 357; Patil, 2008c: pp. 116–117; Patil, 2009: p. 278; Raghunathan & Punithavelu, 2009: p. 149; Patil & Talmale, 2011: p. 6; Punithavelu & Raghunathan, 2013: p. 23; Surya Rao, Venkitesan & Rao, 2013: p. 82; Basu et al., 2018: p. 12049.

Idiopoma dissimilis — Brandt, 1974: pp. 36–37; Nasemann et al., 2007: p. 74, pl. 19, figs 4, 5, pl. 20, fig. 3; Tripathy, Sajan & Chandra, 2019: p. 14; Mukhopadhyay et al., 2020: pp. 355, 357.

Type locality. “In Museo Spengleriano”.

Material examined. Reg. No. NZSI M.30050/7, 22.vii.2017, 11 spms., India, West Bengal, South 24 Parganas District, Chintamoni Kar Bird Sanctuary, leg. T. Biswas and S. Das; Reg. No. NZSI M.34465/10, 2.ix.2017, 8 spms., India, West Bengal, South 24 Parganas District, Chintamoni Kar Bird Sanctuary; Reg. No. NZSI M.34464/10, 9.ix.2017, 5 spms., Chintamoni Kar Bird Sanctuary, leg. S.K. Sajan.

Distribution. India: Common throughout India; Elsewhere: Bangladesh, Malayasia, Myanmar, Pakistan, Sri Lanka.

Remarks. It is also known as Bellamya dissimilis; species has a wide distribution in India.

 

Superfamily Lymnaeoidea Rafinesque, 1815

Family Bulinidae P. Fischer & Crosse, 1880

Subfamily Bulininae P. Fischer & Crosse, 1880

Genus Indoplanorbis Annandale & Prashad, 1921

Indoplanorbis Annandale & Prashad, 1920: p. 578.

Type species. Planorbis exustus Deshayes, 1834 [accepted as Indoplanorbis exustus (Deshayes, 1833)]

Distribution. Africa, Central Asia, South and Southeast Asia

 

Indoplanorbis exustus (Deshayes, 1833)

(Image 2H)

Planorbis exustus Deshayes (in Belanger), 1833: pp. 417–418, pl. 1. figs 11–13; Preston, 1915: pp. 115–116.

Planorbis (Planorbis) exustus — Germain, 1921: pp. 26–41, figs 1–16, pl. 1, figs 4–9, pl. 4, figs 11, 17, 18.

Indoplanorbis exustus — Annandale, 1922: p. 160; Benthem Jutting, 1956: p. 471; Brandt, 1974: pp. 234-–235, pl. 16, fig. 99; Subba Rao, 1989: p. 142, figs 326–327; Agrawal, 1995: p. 36; Neubert, 1998: p. 359; Surya Rao, Mitra & Manna, 2004: p. 42; Hatter et al., 2004: p. 5; Patil & Ramakrishna, 2004: p. 150; Patil & Talmale, 2005: p. 1913; Patil, 2005: p. 444; Patil, Ramakrishna & Mitra, 2006: pp. 169–170; Ramakrishna et. Alfred, 2006: p. 44; Ramakrishna, Siddiqui & Sahu, 2006: p. 29; Ramakrishna, Mitra & Aravind, 2006: pp. 10–11; Punithavelu & Raghunathan, 2007: p. 88; Nasemann et al., 2007 : p. 90, pl. 23, figs 1a–c; Ramakrishna & Dey, 2007 : p. 253–254, text figs 109A & 109B; Patil, 2008a: p. 66; Patil, 2008b: p. 359; Patil, 2008c: p. 119; Patil, 2009: p. 280; Raghunathan & Punithavelu, 2009: p. 150; Patil & Talmale, 2011: pp. 15–17; Patil & Talmale, 2012: p. 267; Punithavelu & Raghunathan, 2013: p. 30; Surya Rao, Venkitesan & Rao, 2013: p. 90; Basu et al., 2018: p. 12049; Tripathy, Sajan & Chandra, 2019: p. 14; Mukhopadhyay et al., 2020: pp. 356, 359, pl. 15, fig. D.

Type locality. “cóte du Malabar [Malabar Coast, India]”.

Material examined. Reg. No. NZSI M.34449/10, 2.ix.2017, 6 spms., India, West Bengal, South 24 Parganas District, Chintamoni Kar Bird Sanctuary; Reg. No. NZSI M.34450/10, 2.ix.2017, 5 spms., Chintamoni Kar Bird Sanctuary, leg.  S.K. Sajan.

Distribution. India: Widely distributed throughout country; Elsewhere: South and South East Asia.

Remarks. Monotypic genus, found in southern Asia, south east Arabia and Socotra Island.  Common in ponds, ditches and canals with or without vegetations.

 

Family Planorbidae Rafinesque, 1815

Subfamily Planorbinae Rafinesque, 1815

Genus Gyraulus Charpentier, 1837

Gyraulus Charpentier, 1837: p. 21.

Type species. Planorbis hispidus Draparnaud, 1805 (= Planorbis albus O.F. Müller, 1774). [accepted as Gyraulus albus (O. F. Müller, 1774)], type by subsequent designation.

Distribution. Cosmopolitan distribution in all possible range countries.

 

Gyraulus convexiusculus (Hutton, 1849)

(Image 2I)

Planorbis convexiusculus Hutton, 1849: p. 657.

Planorbis saigonensis — Crosse & Fischer 1863: p. 362, pl. 13, fig. 7.

Planorbis (Gyraulus) convexiusculus — Preston, 1915: pp. 118–119; Germain, 1921: pp. 118–119.

Planorbis (Gyraulus) nanus — Germain, 1921: pp. 131–132, pl. 2, figs 10–12.

Gyraulus convexiusculus — Annandale & Prashad, 1919: pp. 52–54; Benthem Jutting, 1956: p. 463; Brandt, 1974: pp. 239–240, pl. 17, fig. 3; Subba Rao, 1989 : pp. 154–155, figs 362–364; Neubert, 1998:  p. 357; Patil & Ramakrishna, 2004: p. 151; Patil & Talmale, 2005: p. 1913; Patil, 2005: p. 444; Patil, Ramakrishna & Mitra, 2006: p. 170; Patil, 2006: p. 15; Ramakrishna & Dey, 2007:  p. 234, figs 172A & 172A; Nasemann et al., 2007:  p. 91, pl. 23, figs 2a–c; Patil, 2008a: p. 67; Patil, 2008c: p. 119; Patil, 2009: p. 280; Raghunathan & Punithavelu, 2009: p. 150; Patil & Talmale, 2011: p. 14; Patil & Talmale, 2012: p. 266; Glöer & Pešić, 2012: p. 50, fig. 20a; Punithavelu & Raghunathan, 2013: p. 31; Surya Rao, Venkitesan & Rao, 2013: p. 89; Basu et al., 2018: p. 12049; Tripathy, Sajan & Chandra, 2019: p. 14; Mukhopadhyay et al., 2020: pp. 356, 359, pl. 15, fig. I.

Type locality.Afganisthan”.

Material examined. Reg. No. NZSI M.34466/10, 2.ix.2017, 2 spms., India, West Bengal, South 24 Parganas District, Chintamoni Kar Bird Sanctuary; Reg. No. NZSI M.34467/10, 9.ix.2017, 4 spms., Chintamoni Kar Bird Sanctuary, leg. S.K. Sajan.

Distribution. India: Common throughout India; Elsewhere:  South East Asia, South Asia, Philippines and Japan.

Remarks. Species has wide distribution in India.

 

Family Lymnaeidae Rafinesque, 1815

Subfamily Amphipepleinae Pini, 1877

Genus Radix Montfort, 1810

Radix Montfort, 1810: p. 266.

Type species. Radix auriculatus Montfort, 1810 [accepted as Radix auricularia (Linnaeus, 1758)], type by original designation.

Distribution. Asia, Europe, Africa, North America.

 

Radix rufescens (J. E. Gray in G. B. Sowerby I, 1822)

(Image 2J)

Limnea rufescens Gray in G. B. Sowerby I, 1822: p. 44, pl. 178, fig. 1.

Limnaea acuminata Lamarck 1882: p. 160; Annandale & Rao, 1925: p. 199; Ramakrishna et. Alfred, 2006: p. 44.

Limnaea (Pseudosuccinea) acuminata form. typica — Patil & Ramakrishna, 2004: p. 148; Patil & Talmale, 2005: p. 1913; Patil, Ramakrishna & Mitra, 2006: p. 168; Patil, 2006: p. 14; Patil, 2008a: p. 66; Patil, 2008b: p. 358–359.

Limnaea (Pseudosuccinea) acuminata form. typical (sic!) — Patil & Talmale, 2012: pp. 262–263.

Limnaea (Pseudosuccinea) acuminata — Agrawal, 1995: p. 35; Punithavelu & Raghunathan, 2007: pp. 87–88; Raghunathan & Punithavelu, 2009: p. 150; Punithavelu & Raghunathan, 2013: p. 27.

Pseudosuccinea acuminate (sic!) — Basu et al., 2018: p. 12049.

Radix rufescens — Aksenova et al., 2018: p. 4; Tripathy, Sajan & Chandra, 2019: p. 14; Mukhopadhyay et al., 2020: pp. 355, 357–358, pl. 15, fig. E.

Type locality. “East Indies”. (from title).

Material examined. Reg. No. NZSI M.30052/7, 22.vii.2017, 3 spms., India, West Bengal, South 24 Parganas District, Chintamoni Kar Bird Sanctuary, leg. T. Biswas and S. Das; Reg. No. NZSI M.34458/10, 9.ix.2017, 9 spms., India, West Bengal, South 24 Parganas District, Chintamoni Kar Bird Sanctuary; Reg. No. NZSI M.34463/10, 2.x.2017, 15 spms., Chintamoni Kar Bird Sanctuary leg. S.K. Sajan.

Distribution. India: Common throughout India; Elsewhere:  South East Asia, South Asia, Philippines and Japan.

Remarks. The synonymy of Limnaea acuminata.

 

Class Bivalvia Linnaeus, 1758

Order Unionoida Stoliczka, 1871

Superfamily Unionoidea Rafinesque, 1820

Family Unionidae Rafinesque, 1820

Subfamily Parreysiinae Henderson, 1935

Genus Lamellidens Simpson, 1900

Lamellidens Simpson, 1900: p. 854.

Type species. Unio marginalis Lamarck, 1819 [accepted as Lamellidens marginalis (Lamarck, 1819)]

Distribution. South and Southeast Asia.

 

Lamellidens marginalis (Lamarck, 1819)

(Image 2K)

Unio marginalis Lamarck, 1819: p. 79, [Encyclop. pl. 247, figs 1a–c].

Lamellidens marginalis Simpson, 1900: p. 854; Subba Rao, 1989: p. 168, figs 404–405; Agrawal, 1995: p. 37; Patil & Ramakrishna, 2004: p. 152; Patil & Talmale, 2005: p. 1913; Patil, 2005: p. 445; Patil, Ramakrishna & Mitra, 2006: p. 171; Ramakrishna et. Alfred, 2006: p. 45; Ramakrishna & Dey, 2007: pp. 288–289, figs 211A–B; Graf & Cummings, 2007: p. 310; Nasemann et al., 2007: p. 29, pl. 8, figs 3–4; Patil, 2008a: pp. 67–68; Patil & Talmale, 2011: pp. 18–19; Patil & Talmale, 2012: pp. 268–269; Surya Rao, Venkitesan & Rao, 2013: pp.91–92; Basu et al., 2018: p. 12049; Tripathy, Sajan & Chandra, 2019: p. 14; Mukhopadhyay et al., 2020: pp. 356, 360, pl. 15, fig. L.

Type locality. “au Bengale”.

Material examined. Reg. No. NZSI M.34447/10, 2.ix.2017, 1 spm., India, West Bengal, South 24 Parganas District, Chintamoni Kar Bird Sanctuary, leg.  S.K. Sajan.

Distribution. India: Common throughout India; Elsewhere: South and Southeast Asia.

Remarks. One of the common mussels of India.

 

Genus Parreysia Conrad, 1853

Parreysia Conrad, 1853: p. 267.

Type species. Unio multidentatus Philippi, 1847 [accepted as Parreysia corrugata (O. F. Müller, 1774)], type by monotypy.

Distribution. South and Southeast Asia.

 

Parreysia favidens (Benson, 1862)

(Image 2L)

Unio favidens Benson, 1862: p. 188.

Unio pinax — Benson, 1862: p. 192.

Unio tripartitus — Lea, 1863: p. 190.

Unio flavidens (sic!) — Reeve, 1865(1868): pl. 26, sp. 131; errata [– read favidens].

Parreyssia favidens (sic!) — Prashad, 1919: p. 292.

Parreysia (Parreysia) favidens — Patil, Ramakrishna & Mitra, 2006: p. 172; Ramakrishna & Dey, 2007: p. 299, figs 220A–B; Patil, 2008a: p. 68; Patil, 2008c: p. 120; Patil, 2009: p. 281; Patil & Talmale, 2012: p. 270.

Parreysia favidens favidens — Nasemann et al., 2007: pp. 31–32, pl. 9, figs 1–2.

Parreysia favidens — Simpson, 1900: p. 842; Preston, 1912: p. 299; Subba Rao, 1989: p. 180, figs 466–467, 484–485; Patil & Ramakrishna, 2004: pp. 152–153; Patil & Talmale, 2005: p. 1913; Patil, 2005: p. 446; Ramakrishna et. Alfred, 2006: p. 45; Ramakrishna & Dey, 2007: p. 299, figs 220A–B; Graf & Cummings, 2007: p. 310; Patil & Talmale, 2011: p. 20; Tripathy, Sajan & Chandra, 2019: p. 14; Mukhopadhyay et al., 2020: pp. 356, 360, pl. 15, fig. K.

Type locality. “Ganges at Bhitoura, between Cawnpore and Allahabad”.

Material examined. Reg. No. NZSI M.34448/10, 2.ix.2017, 2 spms., India, West Bengal, South 24 Parganas District, Chintamoni Kar Bird Sanctuary, leg.  S.K. Sajan.

Distribution. India: Common throughout India; Elsewhere: Bangladesh, Nepal, Sri Lanka, Myanmar.

Remarks. One of the common mussels of India.

 

 

CONCLUSION

 

A detailed malacological sampling was carried out for the first time from any protected Area of West Bengal and molluscan diversity have been reported for the first time from the CKBS.  A total of 276 specimens were collected and examined from the Chintamoni Kar Bird Sanctuary, West Bengal which reveals presence of 22 species of land and freshwater molluscs.  The malacofauna apparently remains most diverse in relation to such a small PA.  But invasive alien species viz. Lissachatina fulica, Allopeas gracile and L. alte which was recorded from this sanctuary is a matter of concern, as it may impact the local biodiversity including succession in the molluscan fauna.  This investigation will provided baseline information for the further future study on molluscan diversity.  Nevertheless, documentation of other such least studied invertebrate from the PA will support better biodiversity conservation for the area.

 

 

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