Discovery
and first description of male Cnemaspis heteropholis Bauer,
2002 (Reptilia: Gekkonidae) from Agumbe, central Western Ghats, India
S.R. Ganesh 1,
Rachakonda Sreekar 2, Saunak P. Pal 3, Gautam Ramchandra 4, C. Srinivasulu5 & Bhargavi Srinivasulu 6
1,2,4 Agumbe Rainforest Research Station,
Agumbe, Shimoga, Karnataka 577411, India
1 Chennai Snake Park, Chennai, Tamil
Nadu 600022, India
2 Biodiversity Research and
Conservation Society, G4, MRK Towers, Swarnadhamanagar, Old Bowenpally,
Secunderabad, Andhra Pradesh 500011, India
3 Centre for Ecological Sciences,
Indian Institute of Science, Bengaluru, Karnataka 560012, India
5,6 Wildlife Biology Section,
Department of Zoology, University College of Science, Osmania University, Hyderabad,
Andhra Pradesh 500007, India
Email: 1 snakeranglerr@gmail.com,2 sreekar1988@gmail.com, 3 herps.saunak@gmail.com, 4gautham1112@gmail.com, 5 hyd2masawa@gmail.com (corresponding author), 6 bharisrini@gmail.com
Date of publication (online): 26 August 2011
Date of publication (print): 26 August 2011
ISSN 0974-7907 (online) | 0974-7893 (print)
Editor: Aaron Bauer
Manuscript details:
Ms # o2614
Received 25 October 2010
Final received 13 June 2011
Finally accepted 01 August 2011
Citation: Ganesh, S.R., R. Sreekar, S.P. Pal, G. Ramchandra, C.
Srinivasulu & B. Srinivasulu (2011). Discovery and first description of
male Cnemaspis heteropholis Bauer, 2002 (Reptilia: Gekkonidae) from Agumbe, central
Western Ghats, India. Journal of Threatened Taxa 3(8): 2023–2027.
Copyright: © S.R. Ganesh, Rachakonda Sreekar, Saunak P. Pal, Gautam
Ramchandra, C. Srinivasulu & Bhargavi Srinivasulu 2011. Creative Commons
Attribution 3.0 Unported License. JoTT allows unrestricted use of this article
in any medium for non-profit purposes, reproduction and distribution by
providing adequate credit to the authors and the source of publication.
Acknowledgements: We acknowledge The Gerry Martin Project for financial
support. We thank Karnataka Forest Department for permission; Romulus Whitaker,
Gowri Shankar, Gerry Martin and colleagues at the Agumbe Rainforest Research
Station for their support and encouragement; the Head, Osmania University,
Hyderabad and Chennai Snake Park for encouragement and facilities. This paper
is part of CEPF-funded Reptile Assessment of the Western Ghats Project and we
duly acknowledge the help from CEPF for publication of this article. We thank
anonymous referees for comments on an earlier draft of the manuscript.
Abstract: Cnemaspis heteropholis Bauer, 2002 was hitherto defined
based only on its holotype, an adult female collected from Gund hill range,
Western Ghats, India. Recently we
observed adult male and juvenile specimens of this species at Agumbe, ca. 200km south of its type locality
and consequently we recharacterize and expand the definition of this species by
providing information about intraspecific variation based on the new
specimens. Colouration in life and
natural history data are also provided.
Keywords: Agumbe, Cnemaspis heteropholis, expanded characterization,
juvenile, male, natural history, pores.
This article forms part of a special series on the Western Ghats of
India, disseminating the results of work supported by the Critical Ecosystem
Partnership Fund (CEPF), a joint initiative of l’Agence Française de
Développement, Conservation International, the Global Environment Facility, the
Government of Japan, the MacArthur Foundation and the World Bank. A fundamental
goal of CEPF is to ensure civil society is engaged in biodiversity
conservation. Implementation of the CEPF investment program in the Western
Ghats is led and coordinated by the Ashoka Trust for Research in Ecology and
the Environment (ATREE).
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Cnemaspis Strauch, 1887 is one of the
most speciose paleotropical gekkonid genera with around 100 recognised species
(Smith 1935). In India, Cnemaspis species are recorded from
the hilly regions of southern India and from northeastern India (Smith 1935;
Sharma 2002). From Karnataka eight
species of Cnemaspis - C. heteropholis Bauer, 2002, C. indica (Gray, 1846), C. indraneildasii Bauer, 2002, C. jerdoni (Theobald, 1868), C. littoralis (Jerdon, 1854), C. mysoriensis (Jerdon, 1853), C. ornata (Beddome, 1870) and C. tropidogaster sensu Smith, (1935) (Boulenger,
1885) - have been reported (Smith 1935; Bauer 2002; Biswas 2006; Ganesh et al.
2007; Manamendra-Arachchi et al. 2007). C. tropidogaster sensu stricto is currently
believed to be a Sri Lankan endemic species known only from the type specimens
and C. littoralis (type lost) is treated as incertae sedis
(Manamendra-Arachchi et al. 2007).
Bauer (2002) described Cnemaspis
heteropholis based only on the holotype ZMH R06158 (Zoologisches Museum
Hamburg, Germany), an adult female, 40.19mm long, collected by G.A. von
Maydell, on 20 January 1956 from Gund [hill range] (15015’N
& 74036’E; 480m elevation), Uttara Kannada District, Karnataka
State, Western Ghats, India (Image 1). Subsequently, Biswas (2006) observed this species in Pushpagiri (12040’N
& 75039’E; 833m), a locality that is ca. 500km south of the type
locality (Image 1). Unfortunately, no
morphological data of the individuals appeared in his work, therefore this
species is still relatively poorly characterized. Bauer (2002) remarked “Comparisons of Cnemaspis
indraneildasii and C. heteropholis are hindered by the fact that only females are
known for the two new species. The
condition of preanal and femoral pores, useful diagnostic characters that are
present only in the males in this genus (Smith 1935), are thus unknown. The absence of the male also hinders the
interpretations of the possible affinities of the new species”. The present communication expands the external
morphological characterization of this poorly known, endemic species by providing
intraspecific variations from male conspecifics observed in Agumbe, Karnataka,
Western Ghats, India.
Materials and Methods
Our observations are based
on two live adult males and two juvenile C. heteropholis sighted in the wild by the
first four authors in Agumbe (13050’N & 75009’E; 557m) (Image 1) Karnataka
State, Western Ghats, India on 02 May 2008, 12 November 2008, 05 May 2010 and
09 July 2010. These live individuals
were examined, photographed in life in situ and released (Table 1). Only one voucher specimen (CESL 097) was
collected by the third author (SP) and deposited in the collection of the
Centre for Ecological Sciences, Indian Institute of Science, Bengaluru,
India. All measurements were recorded
using a slide vernier calliper and are given to the nearest 0.1mm. Morphometric abbreviations are as follows:
SVL, snout to vent length; TL, tail length; BW, maximum body width; HL, head
length from posterior axis of the jaw to the tip of the snout; HW, head width
at its widest point; HD, head depth at its parietal region; ED, horizontal eye
diameter; EL, maximum ear diameter; E-E, distance from posterior edge of eye to
anterior edge of ear; E-S, anterior edge of eye to snout tip; IN, internarial
distance; IO, transverse distance between anterior most supraciliaries; LAL,
lower-arm length measured as distance from elbow to wrist; UAL, upper-arm
length measured as distance between axilla and angle of elbow; FEL, femur
length measured as distance between groin and knee; TBL, tibia length measured as
distance between knee and heel; and A-G, axilla to groin distance. Sex was determined on the basis of the
presence of enlarged hemipenal bulges and femoral pores.
Observations
Cnemaspis
heteropholis Bauer, 2002
Description: Snout-vent length 18.2–45.1 mm. Head oblong, large
(HL/SVL ratio 0.33), wide (HW/SVL ratio 0.19) and distinct from neck. Snout long (E-S/HW ratio 0.77), much longer
than eye-diameter (ED/E-S ratio 0.46). Scales
on the canthus-rostralis larger than the scales on the forehead and dorsum. Eye
small (ED/HL ratio 0.20). Ear-opening
oval and small (EL/HL ratio 0.09). Eye-ear distance slightly larger than eye diameter (EE/ED ratio 1.16). Rostral wide as long, completely divided by
the rostral groove. Nostrils oval, not in contact with the first supralabial,
three postnasals. Mental enlarged,
triangular, longer and wider than rostral; the first pair of postmentals
separated by three enlarged scales (Image 2d); outer postmentals smaller than
the inner. Supralabials to the angle of
jaws 9, infralabials to the angle of jaws 8 (Image 2c). Body relatively wide (BW/SVL ratio 0.11) not
elongate (A-G/SVL ratio 0.45), ventro-lateral fold absent. Six femoral pores on
either side separated by 16–18 non pore-baring scales (Image 2b). Pore-bearing scale enlarged relative to the
adjacent scales. Original as well as regenerated tail oval in cross-section,
almost equal to snout-vent length (TL/SVL ratio 0.95). No enlarged post-cloacal spurs. Scales on
post-cloacal region slightly larger than those on the rest of the dorsum of the
tail. Upper arm slightly shorter than lower arm (UAL/LAL ratio 0.95). Femur
shorter than tibia (FEL/TBL ratio 1.17).
Colour in life: Dorsum of head, limbs and
vertebral region mottled light brown with dark blotches along the dorsal
midline larger than those on the head, either side of this dorsal midline are
an additional dorsolateral row of light brown spots. Flanks dark brown with light yellow spots
(tubercles; Image 2). Digits with
alternating white and black bands, white at joints. Original and regenerated tail brown with dark
spots. Throat buff interspersed with
yellow, unpigmented abdomen and bright yellow on the scales between the femoral
pores. Two yellowish-white stripes on
the dorsolateral side of the head from the rostrum to the eye, and three
stripes running after the eye to the ear.
Difference between the sexes: No variation in meristic characters was
observed among the sexes except for the presence of six femoral pores on either
side in males. Though there are
variations in the measurements between the sexes, they should be treated with
caution as a live specimen is being compared with a preserved specimen. Shrinkage commonly occurs in geckos following
fixation and preservation.
Natural History: During May 2008, a juvenile was observed at
1630hr on a drying stream-bed, among moss-clad rocks, carpeted with thick leaf
litter. During October 2008, an adult male was observed at 1120hr inside the
upper arch of a small cave within a forest patch. Several (n > 5) individuals were sighted
together and darted inside small crevices at the least sign of our
approach. During May 2010, an adult male
was found resting on a mesh fence in the Agumbe Rainforest Research Station at
2100hr. Opportunistic sightings since 2008 suggest that the lizard is not
common and is somewhat crepuscular in habit and were observed foraging in the
night. Other lizard species found
syntopic were Hemidactylus cf. brookii, Hemidactylus frenatus, Ristella
beddomii, Calotes rouxii and Cnemaspis indraneildasii.
Comparisons: Presence of six femoral
pores on each side and the absence of preanal pores distinguish C. heteropholis from C. boiei (Gray, 1842), C. ornata (Beddome, 1870), C. beddomei (Theobald, 1876), C. littoralis (Jerdon, 1853), C. otai Das & Bauer, 2000, C. nairi Inger et al., 1984 and C. australis Manamendra-Arachchi et al.,
2007; absence of spine-like tubercles on flanks distinguishes it from the newly
described C. nilagarica Manamendra-Arachchi et al., 2007 and C. monticola Manamendra-Arachchi et al.,
2007. It may be distinguished from the
morphologically similar C. sisparensis (Theobald, 1876) by its
heterogenous (vs. homogenous) dorsal scalation and the presence of six femoral
pores on each side (vs. 7–8) and C. wynadensis (Beddome, 1870) from having three (vs. 1–2)
scales between the enlarged postmentals, weakly conical (vs. keeled) dorsal
head scales and subcaudals on median series divided.
Discussion
Our specimens are
consistent with the original description of Bauer (2002) in morphology and
colour. J.C. Daniel collected “C. wynadensis” from the current locality
in 1965 (CAS 104211, Herpetology collection
catalogue, California Academy of Sciences). The specific epithet “wynadensis” refers to its original
collection locality in Wynaad District, Kerala State and its surrounding
localities (Smith 1935; Bauer 2002) and there have been no other records of it
occurring in Karnataka. It might be
possible that this specimen might actually be a C. heteropholis misidentified as C. wynadensis due to external
morphological similarities and that C. heteropholis has been described only in
the recent past. This explains the cause
as to why this species has remained relatively obscure. Biswas’ (2006) record
from Pushpagiri reveals that this species occurs further south and in potential
sympatry with several, morphologically similar-looking congeners like C. wynadensis and C. sisparensis. But nonetheless, its unique, intermixed,
prominent large tuberculate dorsal scalation clearly gives away this
species. It is likely that C. heteropholis occupies a wide range of
biotopes between the Palghat and the Goa gaps in the Western Ghats, at
altitudes ranging from 480m (Bauer 2002) to up to 833m (Biswas 2006). More sightings are needed to better
understand its characterization, distribution and biology.
References
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Gekkonidae) from Gund, Uttara Kannada, India. Mitteilungen aus dem Hamburgischen Zoologischen
Museum und Institut 99: 155–167.
Biswas, S. (2006). A possible occurrence of
regional integumentary loss in Cnemaspis
heteropholis from southern India. Gekko 5(2): 28–30.
Ganesh, S.R., S.R.C. Mouli & S.L. Edward (2007). A study on herpetofaunal assemblages in the rain forests of
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