Trigerastraea
Diagnostic description:
Colonial, massive, cerioid, subplocoid, submeandroid. Budding predominantly intracalicular. Calices monocentric or arranged in discontinuous series, separated by tectiform to tholiform collines. Ambulacra present or absent. Costosepta generally compact, confluent to nonconfluent. Septal flanks have fine dentations, flattened and rounded granules, and small ?pennulae. Columella spongy-papillose or made of irregular segments. Synapticulae numerous. Wall parasynapticulothecal, incomplete or absent. Endothecal dissepiments abundant.
Remarks:
In contrast to the original documentation by Alloiteau (1957, p. 287), the septal structures of genus Trigerastrea seem to be more closely related to types seen in genera like Dimorphomeandra, but correspond less to the genus Vallimeandra. Therefore, the genus Trigerastrea is grouped with the former taxon.
Look alikes:
Like Dimorphomeandra but forms subplocoid-subcerioid to submeandroid colonies.