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Total: 3

genus valid

Genus Arthraria Billings Canad. Naturalist & Quart. J. Sci., 6(4): 467. Sep 1872

genus valid

Genus Beatricea Billings Rep. Progr. Geol. Survey Canada, 1853-1856 343. 1857

genus valid

Genus Pasceolus Billings Rep. Progr. Geol. Survey Canada, 1853-1856 342. 1857