Anthobium hydraenoides, Shavrin & Smetana, 2017

Shavrin, Alexey V. & Smetana, Aleš, 2017, A revision of Eastern Palaearctic Anthobium Leach, 1819 (Coleoptera: Staphylinidae: Omaliinae: Anthophagini). I. Gracilipalpe, morchella and nigrum groups, Zootaxa 4365 (1), pp. 1-39 : 13

3.2. Morchella group

Diagnosis. Body moderately convex, very glossy, glabrous; pronotum and elytra with coarse, large and deep punctation; apical segment of maxillary palp three to four times as long as preceeding segment; pronotum markedly narrowed from middle posteriad, with anterior angles indistinctly protruded anteriad, lateral margin with large or small irregular crenulation; elytra about as long as wide, markedly widened posteriad, each elytron with indistinct irregular elevations between punctures or with three indistinct longitudinal elevations.

Species included: A. hydraenoides sp.n., A. morchella sp.n., A. puetzi sp.n.

Remarks. By the body size, elongated mouthparts and legs, species of the morchella group are similar to those of gracilipalpe and nigrum groups. From gracilipalpe group they differ by more glossy body, less deep impressions on head and pronotum, wider forebody with apical angles of pronotum indistinctly protruded anteriad, and in some species by the characteristic irregular elevations between punctures on the elytra. From nigrum group they differ by more convex body and by the presence of small or elongated longitudinal elevations on the elytra. From both groups they differ by the absence of erect elongated irregular setation on the forebody, by the stronger punctation and sculpture of the forebody, markedly more elongated maxillary palpomeres and larger lateral crenulation of the pronotum.