Species

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Total: 60

species valid

Azollopsis tomentosa J.W. Hall Amer. Fern J., 58(2): 83. 24 Jun 1968

species valid

Buthotrephis antiquata J. Hall Palaeontol. New York, 1(unknown): 8. 1847

species valid

Buthotrephis flexuosa (Emmons) J. Hall Palaeontol. New York, 1(unknown): 263. 1847

species valid

Buthotrephis gracilis J. Hall Palaeontol. New York, 1(unknown): 62. 1847

species valid

Buthotrephis subnodosa J. Hall Palaeontol. New York, 1(unknown): 262. 1847

species valid

Buthotrephis succulens J. Hall Palaeontol. New York, 1(unknown): 62. 1847

species valid

Callandrium callistophytoides Stidd, J.W. Hall Amer. J. Bot., 57(4): 398. 30 Apr 1970

species valid

Costatheca dakotaensis (Schemel) J.W. Hall J. Paleontol., 41(5): 1298. 22 Sep 1967

species valid

Costatheca dentata (Dijkstra) J.W. Hall J. Paleontol., 41(5): 1298. 22 Sep 1967

species valid

Costatheca diskoensis (E.L. Miner) J.W. Hall J. Paleontol., 41(5): 1298. 22 Sep 1967

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