Description of a new species
of the genus Bitomus Szepligeti (Hymenoptera: Braconidae) from India
AhmadSamiuddin 1, ZubairAhmad 2 & Mohammad Shamim 2
1 Department
of Plant Protection, Faculty of Agricultural Sciences, Aligarh Muslim
University, Aligarh, Uttar Pradesh 202002, India
2 Entomology
Section, Department of Zoology, Aligarh Muslim University, Aligarh, Uttar
Pradesh 202002, India
Email: 1 asamiuddin@gmail.com
Date of publication (online): 26 March 2010
Date of publication (print): 26 March 2010
ISSN 0974-7907 (online) | 0974-7893 (print)
Editor: T.C. Narendran
Manuscript details:
Ms
# o1943
Received
11 February 2008
Final
received 24 October 2009
Finally
accepted 02 February 2010
Citation: Samiuddin, A., Z. Ahmad & M. Shamim (2010). Description of a new
species of the genus Bitomus Szepligeti (Hymenoptera: Braconidae) from India. Journal of Threatened Taxa 2(3): 770-772.
Copyright: © Ahmad Samiuddin, ZubairAhmad & Mohammad Shamim 2010. 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 thank Dr.
M. Hayat and Dr. Shujauddinfor reviewing the manuscript and offering useful suggestions. Authors are also thankful to Chairman,
Department of Zoology for laboratory facilities.
Abbreviations: ATP - Anterior Tentorial Pit; 2RS
- first cubital cross vein; m-cu - recurrent vein; r
- first abcissa of radius; 3RSa - second abcissa of radius; 3RSb - third abcissaof radius; 2CUb - parallel vein; 1 cu-a - nervulus;
m-cu in hind wing - post nervellus; F1- firstflagellomere; F8 - eight flagellomere;
F1-7 - first to seventh flagellomere; T2 - secondmetasomal tergite; T3 - thirdmetasomal tergite; OOL - ocello-ocular line (distance from the outer edge of a
lateral ocellus to the compound eye); POL - post-ocellar line (distance between the inner edges of the two
lateral ocelli); AOL - anterior-ocellarline (distance between the inner edges of anterior and lateral ocellus); OD - diameter of an ocellus;
ZDAMU - Zoology Department, Aligarh Muslim University.
The genus Bitomus Szepligeti was recently redescri-bed and revised by Fischer (1987, 1994) and
briefly treated by Papp (1978, 1982) and Wharton (1997). Among the opiinegenera, it is the only genus that has metasomal terga 2-3 or 2-4 usually concealing the remainder of terga to form a hard shell (carapace) like structure. The genus is essentially Old World,
mostly tropical with 16 described species, the genus is represented by seven
species from Oriental, six species from Palaearcticand three species from Ethiopian region, (Fischer 1987). Bitomus is represented by a single species Bitomus hemicoriaceus Fischer from India. In the present work one new species is
described under this genus from India. The diagnostic characters of the species isprovided.
The terminology for the various
body parts and wing venation is that of Sharkey & Wharton (1997), while Eady (1968) has been followed for the description of
surface sculpture.
The types of the new species are
deposited in the Insect Collection, Department of Zoology, Aligarh Muslim
University, Aligarh, India.
Bitomus indicus Samiuddin sp. nov.
(Images 1-4)
Material examined:
Holotype: Male, 24.vi.2002, Etawah, Uttar
Pradesh, India, coll. Mohammad Shamim, HYM/BR007.
Paratypes: 1 male, 1 female, 15.ix.1982, Aligarh, Uttar Pradesh, India,
coll. Shujauddin, HYM/BR052-053; 1 female,
19.iv.2005, Baburpur-Auraiya, Uttar Pradesh, India,
coll. Mohammad Shamim, HYM/BR054.
Distribution: Uttar Pradesh,India.
Etymology: The specific name refers to the
country of origin of the species.
Female
Body: length 2.0mm.
Head:
Polished, pubescent, 2.2x wider than long (24.5:11); frons smooth, polished. Eyes large, in the same level
rounded with temple, 2.1x longer than temple (7.5:3.5); temple strongly narrow,
0.5x as long as eye (3.5:7.5). Occiput slightly curved. Ocelli slightly protruded, AOL:POL: OOL: OD = 2:3:5.5:2, stemmaticumdensely punctate, width, 0.16mm., elsewhere sparsely
punctuate and pubescent. Face
evenly convex, quadratic, 1.6x as wide as high (12.5:8), thickly and deeply punctate, pubescent, middle carina visible clearly on top
extinct on bottom; eye margin curved. Clypeus slightly convex, polished; more
sparsely punctate than the face; 1.3x as wide as high
(7:5.5); separated from face by a weak semi-circular suture, anterior margin
protrudes fold like in the middle. Anterior tentorial pit (ATP)
small, inter-tentorial line 2.3x as tentorial-ocular line (7:3). Malar area almost as long as basal mandibular width (3:3.5), mandibles at the base not wide. Oral cavity not visible. Maxillary palpi0.7x as long as head height (12.5:18.5). Antennae filiform, almost as long
as body (78:79.5), 22-segmented (range 20-22 segments), F1 twice as
long as wide (4:2), following flagellomeres (F2-F12)
almost equally long Length (3.5), rest (F13-F19) slightly
short length (3), F18 and penultimate (F19)
1.7x as long as wide (3:1.8), flagellomeres are
clearly separated from each other.
Mesosoma: 1.2x as long as high (30.5:24.5), 1.3x as high as head
(24.5:18.5) and 1.1x as wide as head (27.5:24.5) dorsally slightly convex. Mesonotumsparsely punctate, polished, pubescent, 0.8x as wide
as long (22:25), equally rounded before the tegulae,
densely setose on anterior declivity; notauli impressed anteriorly,
finely crenulate, absent on disc; mid-pit oval; rest
of the disc sparsely setose. Scutellar sulcus deep, strongly crenulate. Scutellumsparsely punctate, polished, 1.7x as wide as long
(13.5:8). Post axillae,
side field of metanotum crenulate.Propodeum reticulate on anterior half, finely rugose posteriorly with a short
mid-longitudinal carina anteriorly. Side of pronotum overall crenulate, more
prominent below. Mesopleuron smooth, polished, anterior marginal furrow
finely crenulate below, posterior marginal furrow
finely crenulate above clearly crenulatebelow; sternaulus deeply impressed, wide, strongly crenulate; extends from anterior to ventral margin. Metapleuronreticulate, epimerum crenulate. Legs short, broad, hind femur 3.5x as
long as wide (17.5:5).
Wings:Stigma wide, wedge shaped length 0.55mm, width 0.15mm; r arising from basal
third of stigma (22:7), 0.4x as long as width of stigma (2.5:6), a slight angle
with 3RSa formed; 3RSa 1.3x as long as 2RS (12.25:9.5); 3RSb slightly outwardly
curved, 1.9x longer than 3RSa (23:12.25). Marginal cell extends clearly upto wing apex;
m-cu postfurcal; second submarginal cell slightly narrow apically almost
rectangular. 1CU 1.5x as long as
m-cu (9:6); 1 cu-a postfurcal; first sub-discal cell closed, 2CUb arising slightly below middle of
first subdiscal cell; m-cu absent in hind wing.
Metasoma: Wide and roundish, 1.3x as long as wide (38:29.5), suture
between T2 and T3 is not clearly visible; petiole
strongly striated, 0.7x as long as its apical width (11.5:16.5), apex 2.3x
wider than its base (16.5:7), side margin of apical third parallel, basal
carina visible until apical margin widely separated from each other, merged in
the striations, the space between basal carina clearly striated; more than 2/3
of the carapace granulate, extreme apex of carapace smooth and polished, the
spiracles on carapace are considerably far from its margin; rest of the tergites concealed beneath carapace. Ovipositor short,
length = 0.09mm, sheath with 8-8 setae arranged on either side.
Colour: Body black; legs yellow, palpi pale;
antennae from F8 to apex, tegulae brown;
F1-7, scape, pedical,
mandible brown; mandibular tip and tarsal claw dark
brown; wings infuscate, stigma and veins brown.
Male: Similar to the female.
Host: Unknown.
Remarks
The new species, Bitomus indicus Samiuddin, sp.nov., closely resembles Bitomus hemicoriaceus Fischer but differs in having
clypeus 1.3x as wide as high (clypeus twice as wide as high in hemicoriaceus), mesonotum 0.8x as wide as long (mesonotum 1.5x as wide as long in hemicoriaceus), propodeum with a short
mid-longitudinal carina anteriorly (propodeum with a curved cross carina in hemicoriaceus), vein r arising from basal third of stigma (vein r arising from
middle of stigma in hemicoriaceus).
References
Eady, R.D. (1968). Some illustrations
of microsculpture in the Hymenoptera. Proceeding of Royal
entomological Society London (A) 43(4-6): 66-72.
Fischer, M. (1987). Hymenoptera, OpiinaeIII: Äthiopische, orientalische,australische und ozeanischeRegion. Das Tierreich., 104. Verlag
Walter de Gruyter Berlin, New York, XV+734pp.
Fischer,
M. (1994). The genus Bitomus Szépligeti (Hymenoptera: Braconidae, Opiinae). Zeitschrift
der Arbeitsgemeinschaft Öster Entomologen 46(1-2):
21-29.
Papp, J.
(1978). Braconidae (Hymenoptera) from Korea. III. Acta Zoologica Academiae Scientiarum Hungaricae 24: 133-148.
Papp, J. (1982). Taxonomical and faunistical novelties of the Opiinaein the Arctogaea (Hymenoptera, Braconidae). Annales Historico-Naturales Musei Nationalis Hungarici 74: 241-253.
Sharkey,
M.J. & R.A. Wharton (1997). Morphology and Terminology, pp.19-37.In: Wharton, R.A., P.M. Marsh & M.J. Sharkey(eds.). ‘Manual of the New World Genera of the Family Braconidae (Hymenoptera)’. The International Society
of Hymnenopterists: Washington D.C.
Wharton, R.A. (1997). Generic relationships of Opiine Braconidae Hymenoptera)
parasitic on fruit-infesting Tephritidae (Diptera). Contributions of the American Entomological Institute 30: 1-53.