Crinoid genera

Antedon is a genus of sessile, stemless crinoids found in shallow tropical and temperate marine environments worldwide. The genus first appears in the fossil record during the Cretaceous period.

Promachocrinus is a genus of free-swimming, stemless crinoids. It was a monotypic genus, with the only species in the genus being Promachocrinus kerguelensis, until the discovery of four new species, establishment of two others previously described and the transfer of another species to the genus in 2023. Known for being coldwater crinoids, members of Promachocrinus are typically found in the seas around Antarctica and surrounding island groups, including under the sea ice. Previously known for having 20 arms, two of the species now included in the genus have 10 arms. Many of the species are c

Comanthus is a genus of crinoid echinoderms (feather stars) belonging to the family Comatulidae.

Leptometra is a genus of free-swimming, stemless crinoids.

Endoxocrinus is a genus of echinoderms belonging to the family Balanocrinidae.

Bathycrinus is a genus of crinoids.

Comaster is a genus of crinoids.

Metacrinus is a genus of stalked crinoids in the family Isocrinidae. Members of this genus live on hard surfaces in deeper parts of the ocean. The genus has extant species and is also represented in the fossil record. Members of the genus grow to a maximum height of and are found in the eastern Pacific Ocean from Japan to Australia.

Comactinia is a genus of crinoids, characteristically with 10 arms, belonging to the family Comatulidae. There are three described species, two from the western Atlantic and one, Comactinia titan, recently described from the western Pacific.

Neocrinus is a genus of crinoids in the family Balanocrinidae, which is otherwise extinct (this genus being a relict). Members of this genus appeared in the fossil record 23.03 million years ago in the Miocene Epoch, and currently contains three known extant species.

Tropiometra is a genus of crinoids in the monotypic family Tropiometridae.

Capillaster is a genus of crinoids. It contains the following species:

Ptilometra is a genus of echinoderms belonging to the monotypic family Ptilometridae.

Notocrinus is a genus of crinoids, which contains two species, both endemic to the seas around Antarctica.

Colobometra is a genus of echinoderms.

Dichrometra is a genus of echinoderms belonging to the family Mariametridae.

Holopus is a genus of echinoderms belonging to the family Holopodidae.

Eudiocrinidae is a family of echinoderms belonging to the order Comatulida. The only genus is Eudiocrinus.

Clarkcomanthus is a genus of echinoderms belonging to the family Comatulidae.

Conocrinus is a genus of sea lilies in the family Bourguticrinidae, containing 6 species.

Aporometridae is a monotypic family of crinoids, the only genus being Aporometra, which contains three species, all endemic to the seas around Australia.