Onitis bordati Cambefort, 1988

Karimbumkara, Seena Narayanan & Priyadarsanan, Dharma Rajan, 2024, Study on the genus Onitis (Coleoptera: Scarabaeidae: Scarabaeinae) of the Indian Subcontinent, with three new species from India, European Journal of Taxonomy 956, pp. 1-61 : 11-13

Onitis bordati Cambefort, 1988

Figs 3 , 4G–J , 5A , 17

Onitisbordati Cambefort, 1988: 190 (original description).

Onitis bordati – Kabakov&Napolov1999:70 (distribution).— Hanboonsong et al. 1999:466 (distribution). — Hanboonsong & Masumoto 2000. — 103, 108 (key, distribution). — Schoolmeesters 2022 (online catalogue).

Differential diagnosis

Onitisbordati belongs to Group IX and it resembles species of Group XVIII in having an uninterrupted frontal carina. It resembles O. siva , in the absence of clypeal carina and differs from it in the pronotum being densely granular.

Material examined

Holotype

VIETNAM • ♂; Djiring, Annam ; 11°35ʹ N, 108°05ʹ E; Coll. H. Perrot; Coll. P. Bordat leg.; Y. Cambefort det. 1987; MNHN, EC1187 .

Additional material (8 specimens)

THAILAND • ♀; “ Prov. TAK Region de UMPHANG VI ; 1 Jun. 1991 – 6 Jun. 1991; Y. CAMBEFORT det. 1992”; MNHN, EC1185 .

INDIA • 2 ♂♂, 5 ♀♀; Meghalaya, Nongkhyllem ; 25°54ʹ56.51″ N, 91°46ʹ4.55″ E; elev. 269 m a.s.l.; 20 May 2012; Karimbumkara Seena Narayanan & Rajkamal Goswami leg.; hand-picked, elephant dung; AIMB / Co/Sc1000016 to 1000022 .

Description

MEASUREMENTS (in mm). TL=23.5–32; BW =11.5–15.5; PL=9–12; PW=11.5–15.5; EL=11.5–15; HL=6–9; HW= 7–8.5.

Male ( Fig. 5A )

Body including legs and antennae reddish black, except the antennal club which is reddish yellow; moderately shining, elongate oval, slightly convex, devoid of any setae on the dorsal surface except at the lower margin of the elytra where a few scattered setae are present. Head with clypeus elongate, strongly rounded, slightly reflexed anteriorly, clypeal carina absent; genae strongly curved, extended outwards and upwards anteriorly, with fine granules; vertex significantly depressed, bordered behind, finely, densely granulate. Pronotum smoothly margined on all sides, the sides of pronotum straight anteriorly, slightly sinuate behind; front angles sharp, obtuse, hind angles obsolete; base angulate in the middle; basal foveae shallow, deeper towards the base, with small ovate granules both within and between them; rows of spindle shaped granules present around the foveae which are not very close, closer and longer in the middle of the pronotum, squamiform and closer anteriorly, the granules smaller, ovate, not very close in the lateral margins; a trace of longitudinal groove extends as a slight depression from the front of the foveae to the front margin of the pronotum; lateral foveae with fine close ovate granules; scutellum very small. Elytra finely striate, striae not perceptibly punctured; intervals flat, opaque, with scattered imperceptible punctures. The sutural interval slightly convex, shining with visible fine scattered punctures; the 5th interval with minute, close, slightly rugose punctures. The lateral carina of the elytra sharp. Pygidium without any hair or setae, opaque, rugose with minute scattered granules. Metasternal shield closely granular and densely hairy at the sides, less granular and hairy in the middle, smooth with imperceptible granules anteriorly and at the base. Sides of the metasternum finely, closely and evenly granular with dense hairs; the hairs shorter than those on the shield. Front legs elongate, tibia slender, strongly curved towards the end with the tip produced into a finger-like process, terminal spur absent, teeth short and triangular; lower side of protibia bears a tooth almost halfway from the base, a shorter one near the base and another short sharper one between these two, the inner side serrate. A tuft of short setae is present in an oval groove near the base of profemur, the upper margins of the legs fringed. The mesofemur is with a sharp tooth just beyond the middle of the lower edge, the hind femur without any teeth. The femoral teeth may not be prominent in minor males.

AEDEAGUS (in mm) ( Fig. 4G–J ). LP= 3.5–4.5, Lp=4.5–5; BP=2, BpB =1.5, BpT=0.5. Phallobase straight. Parameres longer than the phallobase, broader at the base and further tapers and bluntly curved above at the tip.

Female ( Fig. 3A–D )

Body oval, not as convex as male; clypeus elongate, strongly elliptical, slightly reflexed anteriorly, closely rugose. The posterior carina curved inwards, with a laterally compressed conical tubercle in the middle behind. Pygidium more shining than in male, rugose with imperceptible scattered granules. Profemur not toothed, tuft of short setae near the base absent. Protibia with an articulated terminal spur; teeth blunt, closer to each other than in male.

Distribution

India: Meghalaya, other countries: Vietnam, Thailand ( Hanboonsong et al. 1999; Kabakov & Napolov 1999; Hanboonsong & Masumoto 2000; Schoolmeesters 2022).

Habitat

In India, this species was collected from bamboo dominated secondary forest near Nonkhyllem Wildlife Sanctuary, Meghalaya.

Remarks

Cambefort (1988) did not describe the female of Onitisbordati, but a female of the species deposited at MNHN was determined by Cambefort (1992) (https://shorturl.at/v4Dlr). In this paper, we provide a description for the female of O. bordati as Hanboonsong & Masumoto (2000) mentioned only some morphological characters. This is a new distribution record of the species from India and the Indian subcontinent.

Figures

Fig. 3. Onitis bordati Cambefort, 1988, ♀, AIMB/Co/Sc1000018. A. Habitus, dorsal view. B. Habitus, ventral view. C. Head, dorsal view. D. Pygidium. (Images: AIMB).

Fig. 4. A–D. Onitis assamensis Biswas, 1980, Aedeagus, lateral, dorsal, ventral and apical views, AIMB/ Co/Sc1000001 (images: AIMB). E–F. O. naviauxi Cambefort, 1988, lateral and dorsal views, MNHN EC4807, (images: Antoine Mantilleri, MNHN). G–J. O. bordati Cambefort, 1988, aedeagus; lateral, dorsal, ventral and apical views, AIMB/Co/Sc1000016, (images AIMB). K–N. O. siva Gillet, 1911, aedagus, lateral, dorsal, ventral and apical views, AIMB/Co/Sc1000704, (images: AIMB).

Fig. 5. A. Onitis bordati Cambefort, 1988, holotype, ♂, MNHN EC1187, (image: Antoine Mantilleri, MNHN). B. O. brahma Lansberge, 1875, ♂, BMNH (E) 1237157, (image: BMNH). C. O.castaneus Redtenbacher, 1848, syntype, (image: Harald Schillhammer, NHMW). D. O. crassus Sharp, 1875, holotype, ♂, MNHN EC4813, (image: Antoine Mantilleri, MNHN). E. O. excavatus Arrow, 1931, lectotype, ♂, BMNH (E) 1237173, (image: BMNH). F. O. falcatus (Wulfen, 1786), ♂, AIMB/Co/ Sc1000070, (image: AIMB).

Fig. 17. Map showing the distribution of OnitisassamensisBiswas, 1980; O. bhomorensis sp. nov.; O. bordatiCambefort, 1988; O. brahma Lansberge, 1875 and O. castaneus Redtenbacher, 1848 in the Indian Subcontinent.