Dolichurus chareshi Anagha and Girish Kumar, 2020

Anagha, S., Kumar, P. Girish & Sureshan, P. M., 2020, Additions to the knowledge of the genus Dolichurus Latreille (Hymenoptera Ampulicidae) from India with the description of two new species, Zootaxa 4821 (1), pp. 121-134 : 123-125

Dolichurus chareshi Anagha and Girish Kumar sp. nov.

( Figs. 1–7 )

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Diagnosis. The new species D. chareshi runs close to D. taprobanae and D. venkataramani in the key, but differs from these species as follows: the mesopleuron is shiny with distinct coarse setaceous punctures and the punctures in the median region have widened interspaces ( Fig. 5 ) (in D. taprobanae and D. venkataramani , mesopleuron shiny with scattered tiny setaceous punctures); frontal platform as broad as long ( Fig. 2 ) (in D. taprobanae and D. venkataramani , frontal platform broader than long); lateral pronotal surface with scattered fine punctures and with rugae posteriorly ( Fig. 5 ) (in D. taprobanae and D. venkataramani , lateral pronotal surface with scattered fine punctures, but without rugae posteriorly). Additionally, D. chareshi have dense coarse punctures on T1-T3, especially on T1, punctures separated by less than twice puncture diameter ( Fig. 7 ), while in D. venkataramani , the punctures of T1-T3, especially on T1 are scattered and, at the median region, they are separated by more than 2–3× the average puncture diameter.

Description. MALE ( Fig. 1 ). Head. rounded in frontal view, vertex slightly arched above eyes; clypeus hairy, clypeal lobe convex with median carina, lobe emarginated on either side of median tooth ending in a weak rounded angle ( Fig. 3 ); head 1.96× as wide as IOD at anterior ocellus; ocelli forming low triangle; POL 1.45× LOL and 0.83× OOL; frontal platform broad as long, with apical margin rounded, sides slightly converging towards top, surface concave and smooth with few scattered punctures near margin; frons with rugulose reticulations ( Fig. 2 ), eyes converging below; vertex with scattered punctures; F1 0.6× combined length of F2 and F3.

Mesosoma . Pronotal collar margined anteriorly with few transverse rugulae ( Fig. 4 ), dorsally with scattered setaceous punctures, dorso-lateral tubercle raised, median pronotal groove shallow or virtually lacking, pronotum smooth laterally with scattered fine setaceous punctures and rugae on posterior half; scutum and scutellum with scattered setaceous punctures; mesopleuron shiny with distinct coarse setaceous punctures and the punctures in median region is with widened interspaces ( Fig. 5 ), sternaulus present as shallow pitted groove; metanotum coarsely longitudinally to obliquely carinate; dorsal surface of propodeal enclosure subrectangular, areolate with certain longitudinal and few oblique carina or rugulae, surface between the carina smooth; posterior surface irregularly rugose, propodeal sides with irregular rugulae and punctures that partly diminishes anteriorly.

Metasoma. Coarse punctures densely on three exposed terga, mainly on T1, separated by less than twice the diameter of punctures ( Fig. 7 ).

Color. Black; apex and base of mandible reddish brown, tegula brownish, flagellomeres dark brown, tibial spurs light brown to ivory; following white to ivory: apical margin of frontal platform and dorso-lateral tubercles on pronotal collar; forewings evenly and slightly infumated.

Vestiture. Whitish vestiture mostly decumbent on clypeus, between antennal sockets and posterior internal margins of eyes, erect on head and mesosoma , short and decumbent on metasomal tergum.

BL. 5.3 mm.

Female. Unknown.

Type material. Holotype ♂, INDIA: Tamil Nadu, Nilgiris district, Coonoor , (11°21’10.8’’N, 76°47’45.24’’E), 7.i.2019, Coll. C. Charesh, ZSI/WGRC/I.R–INV.13585 . Paratypes: 2 ♂, same as holotype, ZSI/WGRC/ I.R.–INV.13586 and 13587. Other individuals: 1 ♂, Rajasthan, Sirohi district, Mount Abu , (24°35’33.36’’N, 72°42’56.16’’E), 28.iii.2019, Coll. P. Girish Kumar, ZSI/WGRC/I.R.–INV.13588 .

Distribution. India: Tamil Nadu, Rajasthan.

Etymology. The species name is named after C. Charesh (Laboratory Assistant at Western Ghat Regional Centre, Zoological Survey of India, Kozhikode), who collected the type specimens.

Figures

FIGURES 1–7. Dolichurus chareshi Anagha and Girish Kumar sp. nov. Holotype ♂. 1. Habitus, lateral view; 2. Head, frontal view; 3. Lower half of head, frontal view; 4. Mesosoma, dorsal view; 5. Mesosoma, lateral view; 6. Fore wing; 7. Metasoma, dorsal view.