Classification of the genus Billingsastraea
G. †Billingsastraea Grabau 1917
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†Billingsastraea billingsi Calvin 1893
†Billingsastraea nevadensis Stumm 1937
†Billingsastraea nevadensis arachne Merriam 1974
Invalid names: Asterocycles Van-Uxem 1842 [synonym]