Dasyproctus tsunekii Binoy, Girish Kumar & Santhosh, 2021

Binoy, C., Kumar, P. Girish & Santhosh, S., 2021, Review of Indian Dasyproctus Lepeletier & Brullé 1835 (Hymenoptera Crabronidae) with description of four new species, Zootaxa 4991 (3), pp. 467-498 : 494

13. Dasyproctus tsunekii Binoy, Girish Kumar & Santhosh , sp. nov.

( Figs 111–120 )

urn:lsid:zoobank.org:act:840505BD-857F-4F0F-AD8E-5EB8D22C30E3

Diagnosis. The new species can be identified by the following combination of characters: distinct furrow beyond IOC on frons, almost reaching anterior ocellus; scape yellow with baso-ventral brown patch; mesosoma black with pronotal lobe and pair of oblong antero-submedial maculae on pronotal collar, pale yellow; metasoma black with faint yellow patch on Gt 5. It resembles D. attenboroughi sp. nov. in having: clypeus antero-medially narrower than antennal torulus; prepectus black; hind femur completely brown; Gt 3 immaculate. It differs from D. attenboroughi sp. nov., however, in having the area beyond IOC declivous, distinct furrow beyond IOC onto frons, almost reaching anterior ocellus (in D. attenboroughi sp. nov., no declivity or furrow present beyond IOC); Gt 2, Gt 4 and Gt 6 immaculate (in D. attenboroughi sp. nov., Gt 2, Gt 4 and Gt 5 maculate); supra orbital fovea well defined, longer than broad (in D. attenboroughi sp. nov., supra orbital fovea indistinct); Gt 5 with an indistinct yellow spot laterally (in D. attenboroughi sp. nov., Gt 5 with a pair of non- continuous yellow streak medially).

Description: Holotype ♂ ( Figs 111–120 ). Body length 4.86 mm; fore wing length 2.93 mm.

Colour. Body matt black with following parts variously coloured: scape pale yellow with dorso-basal brown patch; pedicel and fu 1 brown with apical edge pale, remaining antennomeres brown; mandible reddish brown with base and apex black, pronotal collar black with a pair of oblong pale yellow anteriorly; pronotal lobe pale yellow; all coxae and trochanters deep brown; all femora brown with apical yellow spot; fore and mid tibiae brown dorsally, bright yellow ventrally up to apex, hind tibia brown with irregular small yellow streaks, all tarsi yellowish brown ( Fig. 111 ).

Pubescence. Thick silvery bristles on clypeus, comparatively fainter setosity on outer side of scapal basin, fainter on gena; scattered pale brown setae on vertex; scattered long setae on mesoscutum, mesopleuron and scutellum, propodeum with longer setae; legs moderately setose; Gt 1 with moderately long setae at base, remaining metasomal terga with thicker and stouter brown setae.

Head. As seen from above transverse, 1.43 × as long as wide ( Fig. 115 ); mandible bidentate with identical teeth; clypeus markedly setose with surface well-hidden below thick silvery bristles, apico-medially produced forward (more so than in D. attenboroughi sp. nov.), forming slightly emarginated margin, longitudinal carina indistinct; antennal toruli almost touching one another and inner eye margin; scapal basin rugose reticulate, smooth just above antennal torulus; IOC distinct; distinct deep furrow present just above IOC, distinct longitudinal grove running from furrow towards anterior ocellus; frons matt, with well imprinted setigerous pits ( Fig. 113 ); vertex with similar sculpture and thick short setae, gena with minute setigerous punctures; supra orbital furrow distinct; POD 1.1 × OOD ( Fig. 115 ); scape with two carinae ventrally; relative lengths of scape: pedicel: flagellomeres I to XI (last) = 17: 3: 4: 3: 3: 3: 3: 3: 2: 2: 2: 2: 4.

Mesosoma . Pronotum with conspicuous transverse carina dorsally and few rugulae laterally; pronotal collar with lateral corner rounded, medial notch indistinct, medio-posterior ridge conspicuous; mesoscutum and scutellum matt with scattered setigerous micropunctures; lateral mesoscutellar margin explanate, posterior margin finely sinuate; scutellum with apical margin coarsely foveolate; metanotum rugose, not separated from propodeum ( Fig. 78 ); propodeum with coarse distinct rugae, interspaces smooth; hind femur of usual shape, as wide as basal width of Gt 1; hind tibia with four stout spines; mesopleuron matt with scattered setigerous micropunctures; metapleuron rugose ( Fig. 117 ); fore wing moderately setose, with brown tinge apically ( Fig. 118 ).

Metasoma. Petiolate, with Gt 1 stout, width at stigmata narrower than width of hind femur; all terga matt black, immaculate, except Gt 5 with faint yellow spot laterally; Gt 1 4.07 × as long as wide, anterior third polished with distinct rugae, remainder matt, with very few setigerous micropunctae ( Figs 119 & 120 ).

Variability. Paratype body length 4.2 mm; posterior margin of clypeus truncate; macula on pronotal collar wide; Gt 5 with larger macula.

Female. Unknown.

Prey. Unknown.

Etymology. The specific epithet is a commemorative, genitive noun in apposition taken from patronym Tsuneki after the late Dr. Katsuji Tsuneki in honour of his prodigious contributions to aculeate hymenopteran taxonomy.

Distribution. India: Kerala.

Material Examined. Holotype ♂, mounted on triangular card, India: Kerala, Kannur dt., Meloor paddy field (11°05’33.9”N 76°47’13.0”E, 28m), 30.i.2018, Coll. P. Girish Kumar, ZSIK Regd. No. ZSI/ WGRC /IR/INV.16511 ; Paratype ♂, pinned, India: Kerala, Kannur dt., Madayipara , 01.ix.2018, Coll. Tessy Rajan, ZSIK Regd. No. ZSI/ WGRC /IR/INV.16512 .

Figures

FIGURES 111–118. Dasyproctus tsunekii Binoy, Girish Kumar & Santhosh, sp. nov. Holotype ♂. 111. Habitus, lateral view; 112. Head and pronotum, lateral view; 113. Head, frontal view; 114. Clypeus; 115. Head, dorsal view; 116. Mesosoma, dorsal view; 117. Mesosoma, lateral view; 118. Fore wing.

FIGURES 119–120. Dasyproctus tsunekii Binoy, Girish Kumar & Santhosh, sp. nov. Holotype ♂. 119. Gt1 & Gt2, dorsal view; 120. Metasoma, lateral view.

FIGURES 73–80. Dasyproctus niger Binoy, Santhosh & Girish Kumar, sp. nov. Holotype ♂. 73. Habitus, lateral view; 74. Head, lateral view; 75. Head, frontal view; 76. Clypeus; 77. Head, dorsal view; 78. Mesosoma, dorsal view; 79. Mesosoma, lateral view; 80. Fore wing.