Eurytyloides Nakanishi 1978

Klopfstein, Seraina, 2014, Revision of the Western Palaearctic Diplazontinae (Hymenoptera, Ichneumonidae), Zootaxa 3801 (1), pp. 1-143 : 55-56

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Eurytyloides Nakanishi 1978


Eurytyloides Nakanishi 1978

Type species. Eurytyloides kusigematii Nakanishi 1978

Diagnosis. Female Eurytyloides can easily be diagnosed by the location of the spiracle of the second tergite on the laterotergite in combination with concave hind margins of tergites 3 to 6, which distinguishes it from Sussaba , and short ovipositor sheaths, which distinguish it from Episemura . The propodeums of the European and the Russian species are unique in that the lateral longitudinal carinae and the carinae surrounding the petiolar area do not meet as in other diplazontines but are parallel and very close to each other until the apex of the propodeum. The male of the European species is not known, but male Eurytyloides kusigematii Nakanishi from Japan have unique, polished and plate-like tyloids on flagellomeres 1 to 2 or 3.

Face coriaceous and matt, more polished below, without vertical impressions, in females entirely black or with a yellow central patch (male of the European species unknown). Clypeus with apical margin thin, with a basal elevation that makes it slightly concave in profile. Female antenna stout, preapical flagellomere quadrate. Mesoscutum with notauli indicated as rugose sculpture; smooth with very small punctures around seta roots, yellow shoulder marks absent; mesopleuron entirely smooth and shining; epicnemial carina complete ventrally. Propodeum with a full set of carinae enclosing basal, petiolar and lateral areas; propodeal spiracle inconspicuous; scutellum carinate only on basal third. Fore wing areolet absent; hind wing with 1 basal hamulus. Hind tibia orange-brown with apex slightly dark. Female metasoma strongly compressed from third segment, tergites 3 to 6 with hind margins strongly concave, extending much further back laterally than dorsally; tergites without transverse impressions. First tergite without median dorsal carinae. Second and third tergites with spiracles on the laterotergites, below lateral fold. Metasoma black or obscurely brown to reddish. Ovipositor sheaths 0.5 times as long as hind tibia, parallel-sided and fully enclosing ovipositor, smooth, apically and ventrally with setae. Male apical scerites unknown.

Distribution. Palaearctic. The genus Eurytyloides was described based on two species from Japan ( Nakanishi 1978), and an additional species was later described from the Russian Far East ( Manukyan 1995). In Europe, a single female was found in a Malaise trap set up in Savernake forest in South West England.

Biology. Nothing is known about the biology of this genus.