Numbers
6 genera in northeastern and western North America:
Caseya Cook & Collins, 1895 - 25 species and subspecies in California and Oregon
Metopiona Gardner & Shelley, 1989 - 1 species, Washington County, Oregon
Ochrogramma Gardner & Shelley, 1989 - 4 species, northern California and southwestern Oregon
Opiona Chamberlin, 1951 - 15 species and subspecies, coastal central California, western Oregon, Puget Sound region
Speoseya Causey, 1954 - 1 species, Calaveras County, California
Underwoodia Cook & Collins, 1895 - 2 species, northern North America
Vasingtona Chamberlin, 1941 - 1 species, British Columbia to Oregon