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Total: 21
genus
valid
Genus
Arthrophycus
J. Hall
Palaeontol. New York, 2(unknown):
4.
1852
genus
valid
Genus
Azollopsis
J.W. Hall
Amer. Fern J., 58(2):
81.
24 Jun 1968
genus
valid
Genus
Buthograptus
J. Hall
19.
genus
valid
Genus
Buthotrephis
J. Hall
Palaeontol. New York, 1(unknown):
8.
1847
genus
valid
Genus
Callandrium
Stidd, J.W. Hall
Amer. J. Bot., 57(4):
398.
30 Apr 1970
genus
valid
Genus
Costatheca
J.W. Hall
J. Paleontol., 41(5):
1298.
22 Sep 1967
genus
unavailable
Genus
Dictyonema
J. Hall
401.
genus
valid
Genus
Discophyllum
J. Hall
Palaeontol. New York, 1(unknown):
277.
1847
genus
valid
Genus
Ichnophycus
J. Hall
Palaeontol. New York, 2(unknown):
26.
1852
genus
valid
Genus
Palaeophycus
J. Hall
Palaeontol. New York, 1(unknown):
7.
1847
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