Triptognathops HEINRICH, 1978

A. M, 2011, Illustrated key to the genera of the subtribe Amblytelina of Palaearctic (Hymenoptera, Ichneumonidae, Ichneumoninae, Ichneumonini), Linzer biologische Beiträge 43 (1), pp. 597-711 : 684-686

16. Triptognathops HEINRICH

Triptognathops HEINRICH 1978 - East. Pal. Ichn.: 63.

Type species: Amblyteles bicolor KRIECHBAUMER.

Triptognathops: RASNITSYN 1981 - Opr. Faun. SSSR 3 (3): 567-568, 623.

D i s t r i b u t i o n: Palaearctic.

I n t r o d u c t i o n:

The genus is characterized by combination of following characters: always slender flagellum, unidentate mandibles, sharp and high elevated and bent dorsally occipital carina, propodeum with strong teeth, long slender legs, weak gastrocoeli and undeveloped thyridia, amblypygous abdomen of females with more or less flattened hypopygium and trapeziform hypopygium of males with cut apex. From relative genus Triptognathus BERTHOUMIEU , it is distinguished by elevated and bent upwards dorsally occipital carina, by absence of sharp tooth between antennal fossae, by presence of weak but distinct impressions at place of base of notauli, by absence of coxal carina, by presence of strong flat teeth on propodeum, by long slender legs, tibiae and tarsi of which covered by long spinules, by absence of longitudinal fold on 3rd and sometimes on 2nd sternites of abdomen, by hypopygium of females without of more long bristles at apex and by hypopygium of males without of long process at apex. Females of the genus in comparison with Triptognathus BERTHOUMIEU have more long and appreciable pubescence. Tyloides on the males flagellum, in case of their presence are not narrow, but elongated-oval.

M o r p h o l o g y:

F l a g e l l u m: Bristle-shaped, always slender, with elongated basal segments, with white annulus or without it, practically not flattened behind middle; in males with elongated-oval tyloides or without them.

H e a d: Head contour from front quite strongly narrowed downwards; vertex from lateral straightly sloping behind ocelli to sharp occipital carina; temples from above strongly almost straightly narrowed behind eyes. Occipital carina from above sharp, high elevated and bent, merged with hypostomal one not reaching mandible base; mandibles rather narrow with one tooth, gradually narrowed from base to pointed apex, from base to middle strongly bordered from below; clypeus slightly convex with strongly impressed, thinned front margin; tubercle between antennal fossae very weak; ocellar triangle from slightly to sharply elevated and spreading on vertex almost to occipital carina; ocelli from normal to very big when diameter of lateral ocellus almost two times more than distance from ocellus to eye.

T h o r a x: Mesonotum slightly convex, only just longer than width, notauli slightly marked at base in a form of impressions more developed in males; surface of mesonotum densely punctured, shining; subalarum narrow, not sharpened; mesopleurae at the bottom with distinct bend; sternauli from distinct to only just marked in a form of triangular impression; scutellum from lateral moderately elevated above postscutellum, from above slightly convex, almost flat, laterally not carinated, in males more convex and higher elevated above postscutellum. Hind margin of metanotum with projections. Length of horizontal part of propodeum always less than length of area posteromedia in middle; basal area short and deep; costulae and coxal carinae absent; area superomedia rectangular, sometimes narrowed backwards; areae dentiparae at apex with strong flat teeth (in contrast to Triptognathus KRIECHBAUMER ); spiracles long, slit-shaped.

L e g s: Long and slender, first segment of hind tarsus compressed from sides, all tibiae and tarsi with long thin spinules. Hind coxae of females elongated, without scopa. Claws long thin, slightly curved.

W i n g s: Areolet pentagonal with narrow base; nervulus slightly postfurcal; radius slightly sinuous; ramulus rather long. Membrane of wing darkened.

A b d o m e n Of females amblypygous, from above broadly-oval, rather strongly narrowed to apex, apical tergites not hidden, sheath of ovipositor not visible from above. Middle and lateral fields of postpetiolus sharply longitudinally striated. Gastrocoeli small, not deep, in females without thyridia, in males with more or less distinct thyridia, many narrower than interval between them; surface of second tergite of females densely indistinctly punctured, in males sculpture of tergites 2-3 rough, dull. Hypopygium of females more or less uniformly covered by long dark bristles; only sternite 2 with fold. Hypopygium of males at apex without long process, with cut apex, but with tendency to narrowing, trapeziform.

C o l o r a t i o n: Body black, tergites 2-3 red, to fully black. Males with white pattern: margins of face and clypeus, scutellum. Legs of females black, of males with red pattern.

S i z e: Body length 14-20 mm.

There are two species in the genus. Differences between them are presented in table 4:

Triptognathops bicolor (KRIECHB.) Triptognathops gobiensis nov.sp.

Flagellum

Without white annulus. With white annulus. Head

Temples in middle 1,2 times longer than Temples in middle 1,2 times shorter than longitudinal diameter of an eye. longitudinal diameter of an eye.

Malar space equal by length to mandible base Malar space 1,4 times shorter than mandible width. base width.

Clypeus with distinct medio-apical impression. Clypeus without medio-apical impression.

Ocelli of normal size, diameter of lateral ocellus Ocelli strongly convex and large, diameter of 1,2 times less than distance from ocellus to eye; lateral ocellus 2 times more than distance from ocellar triangle slightly expressed, not spread on ocellus to eye; ocellar triangle strongly elevated vertex up to occipital carina. and bordered laterally by impression, on vertex expressed up to occipital carina. Thorax

Mesopleural fovea without narrow sharp Mesopleural fovea with narrow sharp impression longitudinal impression around. around.

Sternauli in a shape of broad triangle impression. Sternauli sharp in a shape of narrow cellular furrow up to hind third of mesopleurae, situated on broad triangle impression.

Mesosternal suture deep, not strongly broadened Mesosternal suture evenly broadened backwards, backwards, without distinct triangle impression forming triangle impression before middle coxae. before middle coxae.

Length of horizontal part of propodeum 1,9 times Length of horizontal part of propodeum 1,5 less than length of area posteromedia in middle. times less than length of area posteromedia in middle. Abdomen

2nd tergite medially more roughly sculptured. 2nd tergite medially more smoothly sculptured.

All sternites without distinct fold, only sternite 2 Sternite 2 with distinct longitudinal fold. only just visible less sclerotized than subsequent ones.