Gnathochorisis species

Varga, Oleksandr, 2021, First record of the genus Gnathochorisis Förster, 1869 (Hymenoptera: Ichneumonidae: Orthocentrinae) from the Afrotropical region, with descriptions of two new species from Kenya, Zootaxa 5052 (3), pp. 441-446 : 442

A key to Afrotropical Gnathochorisis species

1. Face, clypeus, meso- and metapleuron black. Second metasomal tergite black, distinctly granulate except apex. Third tergite and propodeum smooth................................................................. G. malavensis sp. n.

- Face, clypeus, meso- and metapleuron yellow/ivory. Second metasomal tergite largely yellow, granulate to apex. Third tergite basally and propodeum centrally granulate................................................... G. ventralis sp. n.

Genus Gnathochorisis Förster, 1869

Diagnosis. Humula (2021) recently defined the genus Gnathochorisis , which can be distinguished from other orthocentrine genera in the tribe Helictini by the following combination of characters: antenna with a scape subcylindrical, elongate, not inflated, and its hind margin of apical truncation not membranous; male flagellomeres without tyloids; female eye inner orbits subparallel or slightly divergent downwards; sternaulus present, but short; propodeum usually with well defined carination; fore wing areolet usually present, if absent, then vein 2 rs-m moderately long; hind femur usually stout; first metasomal segment tergite and sternite fused; glymmae absent; ovipositor up-curved, with a subapical notch, 0.5–1.1 × length of hind tibia.

The African members of the genus can be recognized by the rather stout body and hind legs; clypeus strongly separated from face; short temples; distinct subocular sulcus; well-developed carinae on propodeum; fore wing with areolet present (absent is some Holarctic and Oriental species, e.g. Gnathochorisis flavipes Förster, 1871 , G. fuscipes Humala & Lee, 2016 and G. leleji Humala, 2021 ); distinctly sculptured metasomal tergites 1–2; and up-curved ovipositor. Unlike other species, Gnathochorisis malavensis sp. n. and G. ventralis sp. n. are characterized by the widely absent dorsally occipital carina and relatively wide clypeus.