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 : 4

Key to species of male Cyrtusa of the continental United States and Canada

1. Aedeagus ( Fig. 1 ) with median lobe broad; parameres short, with only membranous apices extending beyond median lobe. Widespread Holarctic species...................... C. subtestacea Gyllenhal

– Aedeagus with median lobe slender; parameres large, elongate, with apices extending beyond median lobe. California and Oregon ........................................... C. grossepunctata Daffner

Figures

Figures 1–6. Aedeagi, dorsal, of Cyrtusa and Isoplastus species. 1) Cyrtusa subtestacea. 2) Isoplastus fossor. 3) I. floridanus. 4) L. luggeri. 5) L. nigriclavis. 6) L. stephani. Scale line = 0.3 mm.