Epomiator, Riedel, 2022

Riedel, Matthias, 2022, Contribution to the knowledge of the Ichneumoninae (Hymenoptera, Ichneumonidae) of Yemen, Linzer biologische Beiträge 54 (1), pp. 275-286 : 276

Epomiator gen. nov.

Type species: Epomiator yemeniticus , new species

Diagnosis: Body length 5 mm. Flagellum slender and filiform, slightly widened beyond middle. Temple strongly narrowed behind eye. Ocelli large. Clypeus flat, very wide, with straight apical margin. Genal carina reaching hypostomal carina far from mandibular base. Mandible with two teeth; lower tooth much smaller than upper one, not bent inwards. Epomia very long and almost reaching hind margin of pronotum. Notaulus indistinct. Mesoscutum punctate and granulate, dull. Mesopleuron densely punctate; speculum almost smooth. Juxtacoxal carina present. Scutellum slightly convex, with lateral carina. Propodeum with clearly differentiated basal horizontal and apical descending parts, similar to Microlongichneumon (see Heinrich 1968: 1234, fig. 219), but anterior transverse carina (costula) present in frontal half of area superomedia. Area basalis without median tubercle. Propodeal spiracle oval. Hind coxa without scopa. Claws simple. Areolet of fore wing strongly narrowed frontally. Vein 1cu-a interstitial. Metasoma clearly oxypygous. Postpetiolus almost entirely smooth and shining. Gastrocoelus weak. Thyridium small, 0.5× as wide as interval between thyridia. Ovipositor sheath slightly reaching behind metasomal apex. Male unknown so far.

Remark: This new genus belongs to the tribe Ichneumonini , subtribe Cratichneumonina as defined by HEINRICH (1968). In the key for the African genera of Cratichneumonina provided by HEINRICH (1968: 792-798), this genus runs to couple 45: Microlongichneumon HEINRICH.

It resembles that genus in most morphological features, especially the structure of the mandible and propodeum, but differs by its smaller size, very wide clypeus with straight apical margin, and white marks on apical tergites. Especially, the epomia is unusually long and reaches almost the hind border of pronotum ( fig. 8 ).

Figures

Figs 8-9: Face of: (8) Stenaoplus harteni nov.sp. ♀ and (9) Spilothyrateles arabicus nov.sp. ♀. Figs 10-11: Spilothyrateles arabicus nov.sp.: (10) basal tergites of ♁, (11) propodeum of ♀.