The lophophore support is loop shaped in contrast to the spiralia of similar looking spiriferids. Terebratulids are also distinguished by a very short hinge line, and the shell is punctate in microstructure.
The lophophore structure of these organisms differs from that of similar-looking spiriferids, which have a spiral shape. Terebratulids also possess a distinctive short hinge line and a shell with punctate microstructure.