Classification of the genus Beltanacyathus
G. †Beltanacyathus
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†Beltanacyathus biserialis Gravestock 1984
†Beltanacyathus bowmani Gravestock 1984
†Beltanacyathus digitus Gravestock 1984
Invalid names: Bayleicyathus Gravestock 1984 [synonym], Fridaycyathus Gravestock 1984 [synonym]