Dicranorhina sreeramani Mawadda, Girish Kumar & Sureshan

Mawadda, N. V. Ayisha, Kumar, P. Girish, Sureshan, P. M. & Rajan, Tessy, 2019, A taxonomic review of the genus Dicranorhina Shuckard (Hymenoptera: Crabronidae: Crabroninae) from the Indian subcontinent with the description of three new species from Southern Western Ghats, Zootaxa 4629 (1), pp. 109-121: 117-120

publication ID

https://doi.org/10.11646/zootaxa.4629.1.8

publication LSID

lsid:zoobank.org:pub:130C61ED-067E-4FDC-A1CE-B773B749AE1D

persistent identifier

http://treatment.plazi.org/id/AE34155A-5512-C154-82BA-FCE5FC4DFC92

treatment provided by

Plazi

scientific name

Dicranorhina sreeramani Mawadda, Girish Kumar & Sureshan
status

sp. nov.

Dicranorhina sreeramani Mawadda, Girish Kumar & Sureshan  sp. nov.

( Figs. 30–41View FIGURES 25–32View FIGURES 33–41)

urn:lsid:zoobank.org:act:B9E396B6-BAEF-4545-920B-07D798B4D368

Diagnosis. Within Dicranorhina  , this new species can be separated from all other species by the following character combination: Hind femur near the base beneath without any distinct tooth or preapical thickening ( Fig. 39View FIGURES 33–41). Glossy median fovea not present above posterior ocelli on vertex ( Fig. 34View FIGURES 33–41). Apex of clypeus with distinct, strong inverted U-shaped incision medially ( Fig. 32View FIGURES 25–32). Median area of clypeus weakly raised with indistinct median carina ( Fig. 32View FIGURES 25–32) Forewing recurrent vein 1 and 2 not united anteriorly, they are distinctly separated ( Fig. 36View FIGURES 33–41). Interocular distance at vertex 1.30 × as long as F1.

Description. Holotype ♀ ( Fig. 30View FIGURES 25–32). Head. Head width 1.30 × its median height in frontal view ( Fig. 31View FIGURES 25–32); clypeus not tripartite, apex of clypeus with distinct, strong inverted U-shaped incision medially ( Fig. 32View FIGURES 25–32); clypeus medially weakly raised with indistinct median carina; distance between antennal toruli 0.29 × distance between antennal torulus and inner eye margin; posterior ocelli opaque, scar-like, thin and oval-shaped ( Fig. 34View FIGURES 33–41), its maximum diameter as long as POL; POL 0.20 × OOL; glossy median fovea not present above posterior ocelli on vertex; interocular distance at vertex 0.46 × interocular distance at clypeus, 1.3 × as long as F1. Antenna ( Fig. 35View FIGURES 33–41) with scape 4.25 × as long as wide, F1 3.4 × as long as wide, 1.08 × as long as F2; F2 1.09 × as long as F3.

Mesosoma  . Pronotal collar with deep transverse grove anteriorly, thick and roundly swollen at lateral areas; but medially obliquely inclined and then raised anteriorly, median length of mesoscutum as long as its maximum width, with a depression at medioanterior area, anterior margin strongly emarginated in middle; mesoscutum with two weak submedian and two lateral carina up to ¼ to half of mesoscutum basally ( Fig. 38View FIGURES 33–41); scutellum convex; propodeum with dense silvery setae on anterior and posterior aspects; propodeal dorsum transversely, finely and closely rugosostriate; forewing ( Fig. 36View FIGURES 33–41) with recurrent vein 1 and 2 not united anteriorly, distinctly separated; hind femur near base beneath without tooth or preapical thickening ( Fig. 39View FIGURES 33–41).

Metasoma. T1 12.43 × as long as its maximum width, 0.99 × as long as T2 ( Fig. 40View FIGURES 33–41); T2 0.75 × as long as its maximum width; T7 somewhat largely densely and subcontiguously punctured, but punctures slightly sparser towards base; pygidial plate as in figure 41.

Colouration. Black, with following ferruginous markings: clypeus except base and apex, mandible except base and apex, scape to F6, posterolateral corner of pronotum, mesoscutum entirely, tegula, mesopleuron anteriorly, metapleuron, propodeum entirely, T1, apex of T6 and S1. Legs mostly ferruginous to reddish brown with following black markings: fore and mid coxae mostly and hind coxae almost entirely, all trochanters and femora, most of hind tibia, mid and hind tibial spurs. Wings slightly yellowish hyaline, forewing with stigma strongly and adjacent areas lightly infumated. Body setae silvery, short setae on apical part of pygidial area yellowish brown.

Size (measured from head to second tergite). 7.61 mm.

♂. Unknown.

Material examined. Holotype, ♀, INDIA: Kerala, Wayanad district, Moolankavu paddy field (11.6729°N, 76.2892°E), yellow pan trap collection, 7.i.2018, Coll. S. Sreeraman, ZSIK Regd. No. ZSI/ WGRC /IR/INV/1 1601.GoogleMaps 

Distribution. India: Kerala.

Etymology. The species is named after Mr. S. Sreeraman, former GSDP Scholar, Western Ghat Regional Centre, Zoological Survey of India, Kozhikode, who collected the holotype.

Discussion. In Tsuneki (1983), females of this new species key out as D. ruficornis ( Cameron, 1889)  in having antenna extensively ferruginous; hind femur near base beneath without distinct tooth. But, it differs from D. ruficornis  in having: (1) interocular distance at vertex 1.30 × as long as F1 (in D. ruficornis  , interocular distance at vertex as long as F1); (2) base of T2 black (in D. ruficornis  , base of T2 ferruginous).

This new species differs from D. dinesani Mawadda, Girish Kumar & Sureshan  sp. nov., in having: (1) glossy median fovea not present above posterior ocelli on vertex (in D. dinesani  sp. nov., distinct glossy median fovea present above posterior ocelli on vertex); (2) apex of clypeus with distinct, strong inverted U-shaped incision medially (in D. dinesani  sp. nov., apex of clypeus with distinct but weak incision (flattened inverted V-shaped) medially; (4) clypeus medially weakly raised with indistinct median carina (in D. dinesani  basal area of clypeus medially strongly raised with distinct median carina; (5) posterolateral corner of pronotum, mesoscutum and propodeum entirely ferruginous (in D. dinesani  , pronotum entirely ferruginous, mark on both sides of mesoscutum anteriorly and propodeum except median part of dorsal side and posterior side ferruginous).