Spilomena tuberculata Tessy, Sureshan et Girish Kumar, 2021

Rajan, Tessy, Kumar, P. Girish, Sureshan, P. M. & Binoy, C., 2021, A review of the genus Spilomena Shuckard (Hymenoptera: Crabronidae) with the description of six new species from India, Zootaxa 5068 (2), pp. 263-276 : 273-275

Spilomena tuberculata Tessy, Sureshan et Girish Kumar , sp. nov.

( Figs 45–52 )

Type material: Holotype, ♀, India: Karnataka, Kodagu dt., Perumbadi (12°08’31’’N & 75°47’44’’E, Alt. 877 m), 03.v.2019, Coll. P. Girish Kumar, ZSIK Regd. No. ZSI/ WGRC /IR/INV/17141 . Paratypes, all col lected by P. Girish Kumar 1 ♀, Karnataka, Kodagu dt., Perumpadi , 03.v.2019, ZSIK Regd. No. ZSI/ WGRC / IR/INV/17144 ; 1 ♀, Karnataka, Kodagu dt., Bettoli, 07.iii.2016, ZSIK Regd. No. ZSI/ WGRC /IR/INV/17145; Karnataka, Kodagu dt., Bettoli , Ayyappa temple, 05.v.2019, ZSIK Regd. No. ZSI/ WGRC /IR/INV/17146 ; 1 ♀, Karnataka, Kodagu dt., Madikeri, Kohinoor , 05.v.2019, ZSIK Regd. No. ZSI/ WGRC /IR/INV/17147 ; 1 ♀, Karnataka, Kodagu dt., Makutta Forest, Heggala , 08.iv.2016, ZSIK Regd. No. ZSI/ WGRC /IR/INV/17148 .

Diagnosis. Spilomena tuberculata sp. nov. differs from its congeners by the following combination of characters: mesosoma brownish yellow with few black patches; relative length to breadth of scape = 23:6; relative length to breadth of stigma = 56:17; propodeal dorsum rugose, postereo-lateral surface with transverse ridges, posteriorly with median longitudinal carina.

Description. Holotype ♀. Body length 5.6 mm; fore wing length 3.6 mm.

Colour. Head black; mandible (except apical tip brown), clypeus, antenna, pronotal lobe, tegula and legs pale yellow; mesoscutum, scutellum, metanotum and metasoma yellowish brown; propodeum brown with yellow patches laterally; mesopleuron yellow; metapleuron brown; fore wing veins and stigma light brown.

Vestiture. Scattered sparse setae on clypeus and mandible; T3–T6 each with scattered setae; ventral margin of T6 with apical suberect setae; remaining body with sparse vestiture.

Head. Clypeus shiny, with scattered setae, markedly convex ( Fig. 46 ); interantennal tubercle prominent, acutely pointed and extending into median carina up to mid frons; mandible bidentate apically, inner mandibular tooth short and blunt; relative length to breadth of scape = 23:6; frons and vertex reticulate with dense setigerous micropunctures; inner eye margin straight; gena imbricate, impunctate.

Mesosoma. Pronotum dull, with longitudinal rugae; anterior carina of pronotal collar conspicuous and straight; mesoscutum reticulate with dense micropunctures; admedian line and parapsidal line lacking; scutellum reticulate with dense micropunctures, anterior groove of scutellum not broadened by crenulation; metanotum reticulate, longitudinally rugose laterally; mesopleuron reticulate with scattered setigerous punctures posteriorly ( Fig. 48 ); metapleuron with irregular ridges; stigma elongate, relative length to breadth = 56:17; recurrent vein of fore wing received well within first submarginal cell; propodeal dorsum rugose ( Fig. 49 ), lateral surface finely aciculate, with scattered transverse ridges, posterior surface with irregular transverse ridges and longitudinal carina medially.

Metasoma. T1 and T2 shiny, impunctate; T3–T6 with scattered setigerous punctures on entire surface; T6 apically with dense brush of short setae.

Male. Unknown.

Etymology. The species name is derived from a distinctively conspicuous interantennal tubercle.

Distribution. India (Karnataka).

Figures

FIGURES 45–52. Spilomena tuberculata Tessy, Sureshan & Girish Kumar, sp. nov., Holotype ♀. 45. Habitus, lateral view; 46. Head, frontal view; 47. Head and mesosoma (in part), dorsal view; 48. Mesosoma, lateral view; 49. Propodeum, dorsal view; 50. Metasoma, dorsal view; 51. Fore wing; 52. Hind wing.