Anthobium Leach, 1819

Anthobium Leach, 1819: 175

Lathrimaeum Erichson, 1839: 624

Deliphrum Erichson, 1839: 627 syn.; Moore 1966: 55

Arpediopsis Ganglbauer, 1895 syn.

Prionothorax Luze, 1905: 68; Shavrin & Smetana 2019: 469

Eudeliphrum Champion, 1920: 244

Other references see in Herman (2001)

Type species: Omalium atrocephalum Gyllenhal, 1827 (= Silpha melanocephalum sensu Marsham, 1802), for details see Herman (2001).

Remarks. The genus Deliphrum was established by Erichson (1839), who included one available species “ Staphylinis tectus Paykull ”, the type species by original designation and monotypy. Erichson (1840) described D. algidum Erichson, 1840 . Based on the long and slender maxillary palpomeres and the shape of the head with elongate and rounded temples, Ganglbauer (1895) described Arpediopsis as a subgenus of Deliphrum and included D. algidum . According Herman (2001), five species in two subgenera ( Arpediopsis and sensu stricto) of Deliphrum are known. Some years ago, D. alticola Coiffait, 1977 and D. nepalicum Coiffait, 1977, both of them described from Nepal (Coiffait 1977), were transferred to Anthobium ( nigrum group) and Olophrum Erichson, 1839, respectively (Shavrin & Smetana 2017, Shavrin 2018). Based on external morphological features, D. tectum and D. frigidum are similar to some species of Anthobium and insignificantly differ from them by the development of spines on the outer and inner edges of meso- and metatibiae. The study of East Palaearctic species related to D. tectum revealed that these spines vary in density and length, sometimes they may be finer on the metatibia than in species of the atrocephalum and consanguineum groups of Anthobium . Consequently, D. tectum and D. frigidum are here assigned to the tectum group of Anthobium, resulting in new combinations. A comparison of the external and internal morphological features of D. algidum with those of species of Anthobium and other taxa of the Anthobium group (Shavrin & Smetana 2020b) revealed that it is congeneric with Anthobium too. Thus, in the present study it is regarded as a member of the algidum group. In the present study, I follow Moore (1966), who proposed the synonymy of Deliphrum with Anthobium . Moore did not find pronounced differences between the spinose edges of tibiae of Anthobium and Deliphrum and, as a result, transferred several North American species to Anthobium, which were originally described as Deliphrum by LeConte (1879) and Casey (1894). Newton et al. (2000) treated Deliphrum as a junior synonym of Anthobium and noted that the placement of some Nearctic species within the genus requires confirmation.