''Thamnoseris'' is an extinct genus of
stony corals
Scleractinia, also called stony corals or hard corals, are marine animals in the phylum Cnidaria that build themselves a hard skeleton. The individual animals are known as polyps and have a cylindrical body crowned by an oral disc in which a mo ...
in the family
Latomeandridae.
References
Scleractinia
{{Scleractinia-stub