Triptognathus pakistanicus, Riedel, 2021

Riedel, Matthias, 2021, A New Contribution to the Knowledge of the East Palaearctic Ichneumoninae (Hymenoptera, Ichneumonidae), Linzer biologische Beiträge 53 (1), pp. 171-240 : 214-215

Triptognathus pakistanicus nov.sp. ( figs 98-101 )

H o l o t y p e: (♀) " Pakistan, Northern areas, Hunza, Aliabad, 2200 m, 36.3152°N 74.6483°E, 4.VI.2007, leg. K. Schönitzer" (ZSM).

D e s c r i p t i o n: ♀: Body length 14.5 mm. Flagellum stout and slightly lanceolate, with 44 flagellomeres; 1 st flagellomere 1.7× longer than wide, 5 th flagellomere square; widest flagellomeres 1.4× wider than long; preapical flagellomere 1.1×longer than wide. Head covered with rather long erected hairs. Temple strongly and almost linearly narrowed behind eyes. OED 1.3× and OOD 1.3× ocellar diameter. Frons and occiput rugose-punctate and granulate, dull. Face densely punctate, finely granulate. Clypeus with rather dense punctures, flat; apical margin sharp and straight. Gena 1.0× as wide as eye, with dense punctures ventrally. Mandible unidentate. MI 0.8. Genal carina reaching hypostomal carina far from mandibular base; hypostomal carina moderately elevated (1.5× width of distal maxillary palp).

Mesosoma covered with brownish hairs. Notaulus not impressed. Mesoscutum with rather dense punctures, smooth and strongly shining between punctures. Mesopleuron rugose-punctate, speculum with fine dense punctures. Metapleuron striate-punctate; juxtacoxal carina present. Scutellum slightly elevated, about as long as wide, finely punctate, without lateral carina. Area superomedia almost rectangular, slightly wider than long; anterior transverse carina absent. Posterior transverse carina with blunt denticular extension at lateral edge. Hind coxa densely punctate, without distinct scopa. Hind femur 3.6× longer than wide, with scattered punctures in ventral 1/4. Tarsi slender, 3 rd mid tarsomere 1.8× longer than wide. Claws not pectinate. Areolet pentagonal, frontal distance between veins 2rs-m and 3rs-m 5× their width; vein 2m-cu distinctly distad its middle. Vein 1cu-a postfurcal (by 1× its width).

Metasoma semi-amblypygous, rather slender; 2 nd and 3 rd sternites with median folds. Metasoma from 3 rd tergite on gradually narrowed to apex (as in Limerodops ). Hypopygium about as long as distance between its hind margin and metasomal apex, at apex with a brush of stiff hairs. Postpetiolus moderately widened, with dorsal carina; lateral field 0.5× as wide as median field, both fields with regular longitudinal striation. 2 nd tergite 0.75× as long as wide. Gastrocoelus moderately impressed, almost triangular, with few ridges. Thyridium small, oblique, 0.4× as wide as the interval. 2 nd and 3 rd tergites with fine and dense punctures, smooth and shining between punctures. Following tergites with superficial punctures. Ovipositor sheath not reaching behind metasomal apex. Color: black. 2nd and 3rd tergites entirely and narrow base of 4th tergite red. 2nd and 3rd

sternites except black median folds red. Wings slightly infuscate; pterostigma ochreous, margins darker.

♁ unknown.

R e m a r k: This new species is characterized by the form of metasoma, erected hairs on head, and black mesosoma and apical tergites. The coloration resembles Triptognathus figulus ERICHSON , but the new species can be distinguished by its different structure of apophyses, slenderer metasoma and larger size. In the key of West Palaearctic Triptognathus ( VALEMBERG 2015) it runs to T. uniguttatus (GRAVENHORST) , but differs by the color pattern and form of metasoma.

Figures

Figs 98-101: Triptognathus pakistanicus nov.sp. ♀: (98) face from frontal, (99) head from dorsal, (100) propodeum from dorsal, (101) basal tergites from dorsal.