Classification of the genus Ajacicyathus
G. †Ajacicyathus Bedford and Bedford 1939
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†Ajacicyathus crassus Debrenne 1961
†Ajacicyathus nevadensis Okulitch 1943
†Ajacicyathus yukonensis Kawase and Okulitch 1957
Classification of the genus Ajacicyathus