Sphaeroderus Dejean, 1826

Bousquet, Yves, 2012, Catalogue of Geadephaga (Coleoptera, Adephaga) of America, north of Mexico, ZooKeys 245, pp. 1-1722 : 153

Genus Sphaeroderus Dejean, 1826

Sphaeroderus Dejean, 1826: 14. Type species: Sphaeroderus lecontei Dejean, 1826 designated by Hope (1838: 65). Etymology (original). From the Greek sphaera (sphere) and dere (neck, by extension pronotum), alluding to the round or oval shape of the pronota (" corselet ... arrondi, ovale ou orbiculé ") of the species then known to Dejean [masculine].

Diversity.

Six species restricted to the boreal and temperate regions of eastern North America.

Identification.

Lindroth’s (1961a) key covers four of the species currently recognized; Sphaeroderus indianae was not included and Sphaeroderus schaumii was considered a junior synonym of Sphaeroderus nitidicollis . A taxonomic revision of the genus is needed.