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Total: 12

genus valid

Genus Allantodiopsis Knowlt., Maxon in Knowlt. Profess. Pap. U.S. Geol. Surv., (155): 24. 19 Jun 1930

genus invalid

Genus Allantodiopsis Knowlt., Maxon in Knowlt. Bull. U.S. Geol. Surv., 1919, (696): 61. 13 Feb 1920

genus valid

Genus Ampelophyllites Knowlt. Bull. U.S. Geol. Surv., 1919, (696): 67. 13 Feb 1920

genus valid

Genus Archaeomnium E. Britton in Knowlt. Profess. Pap. U.S. Geol. Surv., 140(A): 24. 19 Feb 1926

genus valid

Genus Florissantia Knowlt. Proc. U. S. Natl. Mus., 51(2151): 270. 24 Nov 1916

genus valid

Genus Meibomites Knowlt. Profess. Pap. U.S. Geol. Surv., 140(A): 44. 19 Feb 1926

genus valid

Genus Microtaenia Knowlt. Profess. Pap. U.S. Geol. Surv., 108(F): 81. 22 Aug 1917

genus valid

Genus Palaeopotamogeton Knowlt. Proc. U. S. Natl. Mus., 51(2151): 251. 24 Nov 1916

genus invalid

Genus Plataeanthus Newb. in Knowlt. Bull. U.S. Geol. Surv., (152): 168. Oct 1898

genus valid

Genus Polytrichites E. Britton in Knowlt. Profess. Pap. U.S. Geol. Surv., 140(A): 24. 19 Feb 1926

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