Cyrtusa, Erichson, 1842

Peck, Stewart B. & Cook, Joyce, 2013, Systematics and distributions of the genera Cyrtusa Erichson, Ecarinosphaerula Hatch, Isoplastus Horn, Liocyrtusa Daffner, Lionothus Brown, and Zeadolopus Broun of the United States and Canada (Coleoptera: Leiodidae: Leiodinae: Leiodini), Insecta Mundi 2013 (310), pp. 1-32 : 3

The Cyrtusa genus-group

The Cyrtusa genus group is defined as Leiodini having a mesosternum that rises vertically between the mesocoxae ( Brown 1937a: 158; Newton 1998: 86; Peck 2001: 252). In the continental United States and Canada the “ Cyrtusa genus group” is composed of the genera Anogdus LeConte , Cyrtusa Erichson , Isoplastus Horn , Liocyrtusa Daffner , Lionothus Brown , and Zeadolopus Broun. This is in contrast to members of the “ Leiodes genus-group” that have the anterior margin of the mesosternum lying obliquely between the mesocoxae, and whose North American members are Ecarinosphaerula Hatch and Leiodes Latreille.