original description
Clark, A. H. (1909). Comatilia, a remarkable new genus of unstalked crinoids. Proc. U.S. Natl. Museum 36: 361-367. [details]
From editor or global species database
Diagnosis Comasteridae with IBr2 and first two arm ossicles joined by synarthry; arms 10, up to 30 mm long; first syzygy at br3+4; ray length <30 mm; P3, Pb and Pc always, and P2, P4 and Pd[details]