Stereus Wollaston, 1857

Peck, Stewart B. & Cook, Joyce, 2009, Review of the Sogdini of North and Central America (Coleoptera: Leiodidae: Leiodinae) with descriptions of fourteen new species and three new genera, Zootaxa 2102 (1), pp. 1-74 : 25-26

Genus Stereus Wollaston, 1857

Stereus Wollaston, 1857: 148 . Type species: Stereus cercyonides Wollaston, 1857 , by monotypy. Revised by Daffner (1983), Perkovsky (1991).

Deltocnemis J. Sahlberg, 1886: 87 . Type species: Deltocnemis humatus J. Sahlberg, 1886 , by monotypy. As genus, Daffner (1983); as subgenus of Stereus, Perkovsky (1991) .

Pseudotriarthron Normand, 1938: 346 . Type species: Pseudotriarthron numidicum Normand, 1938 , by monotypy. Synonymized by Daffner (1983).

Diagnosis. Antennal club large, 3-segmented; mandibles elongate, strongly protruding, apices entire; labrum emarginate; epistomal suture not carinate, strongly marked laterally, faintly indicated medially; clypeus lightly sclerotized; eyes not protuberant; post-ocular tempora not developed; gular sutures widely separated at base, convergent to base of submentum, narrowly separated apically, with a suture separating gula and submentum; mesoventrite weakly oblique, not carinate; mesocoxae narrowly separated by mesoventral process; tarsi very slender.

Distribution and diversity. The genus is known to contain four Palearctic species ( Daffner 1983, Newton 1998), and the following new species from the Nearctic.