Triarthron Märkel, 1840

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 : 8

Genus Triarthron Märkel, 1840

Triarthron Märkel, 1840: 141 . Type species: Triarthron maerkelii Märkel, 1840 , by monotypy.

Triarthrum Agassiz, 1847: 375 (unjustified emendation of Triarthron ).

Diagnosis. Antennal club large, 3-segmented; mandibles conspicuous, elongate, apices entire; labrum emarginate; clypeus sexually dimorphic, lightly sclerotized and deeply concave in male, in female short, strongly sclerotized basally and lightly sclerotized apically; epistomal suture curved, a raised carina in male; eyes large, protuberant; gular sutures widely separated at base, convergent to base of submentum, with a suture separating gula and submentum; mesoventrite (mesosternum of other authors) weakly oblique, not carinate; mesocoxae narrowly separated by mesoventral process; all tibiae slender; male with several teeth on posterior margin of metafemur.

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