PBDB Taxon

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Homocrinida

Crinoidea - Homocrinida

Taxonomy

Homocrinida was named by Ausich (1998).

It was assigned to Disparida by Ausich (1998), Ausich and Copper (2010); to Disparida by Wright et al. (2017); and to Disparida by Ausich et al. (2018).

Subtaxa

Anomalocrinidae, Atopocrinidae, Cincinnaticrinidae, Columbicrinidae, Homocrinidae (syn. Tunguskocrinidae, Apodasmocrinidae), Ramacrinidae

Synonymy list

Year	Name and author
1998	Homocrinida Ausich p. 26
2010	Homocrinida Ausich and Copper p. 63
2017	Homocrinida Wright et al. p. 842
2018	Homocrinida Ausich et al.

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Rank	Name	Author
kingdom	Animalia	()
—	Bilateria
—	Eubilateria	Ax 1987
—	Deuterostomia
—	Ambulacraria
phylum	Echinodermata
subphylum	Blastozoa

Rank	Name	Author
class	Crinoidea	Miller 1821
subclass	Pentacrinoidea	Jaekel 1918
infraclass	Inadunata	(Wachsmuth and Springer 1897)
—	Disparida	(Moore and Laudon 1943)
order	Homocrinida
order	Homocrinida

If no rank is listed, the taxon is considered an unranked clade in modern classifications. Ranks may be repeated or presented in the wrong order because authors working on different parts of the classification may disagree about how to rank taxa.

Or. †Homocrinida Ausich 1998

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Fm. †Anomalocrinidae Wachsmuth and Springer 1886

G. †Anomalocrinus Meek and Worthen 1868

†Anomalocrinus astrictus Ausich et al. 2018

Fm. †Atopocrinidae Warn and Strimple 1977

G. †Othneiocrinus Lane 1978

†Othneiocrinus priscus Lane 1970

Invalid names: Atopocrinus Lane 1970 [replaced]

Fm. †Cincinnaticrinidae Warn and Strimple 1977

Subfm. †Cincinnaticrininae Warn and Strimple 1977

G. †Cincinnaticrinus Warn and Strimple 1977

†Cincinnaticrinus varibrachialus Warn and Strimple 1977

Invalid names: Heterocrinus heterodactylus Hall 1847 [synonym]

G. †Dystactocrinus Ulrich 1924

†Dystactocrinus constrictus Hall 1871

G. †Serendipocrinus Donovan 1992

†Serendipocrinus lamonti Donovan 1992

G. †Doliocrinus Warn 1982

G. †Glaucocrinus Parks and Alcock 1912

G. †Isotomocrinus Ulrich 1925

†Isotomocrinus apheles Ausich et al. 1998

†Isotomocrinus typicalus Ulrich 1925

†Isotomocrinus typus Ulrich 1925

G. †Ohiocrinus Wachsmuth and Springer 1886

†Ohiocrinus brauni Ulrich 1925

†Ohiocrinus laxus Hall 1871

†Ohiocrinus oehanus Ulrich 1925

G. †Tenuicrinus Kallmeyer and Donovan 1998

†Tenuicrinus longibasalis Kallmeyer and Donovan 1998

G. †Tryssocrinus Guensburg 1984

Invalid names: Tryssocrininae Guensberg 1984 [empty]

Fm. †Columbicrinidae Ausich 1998

G. †Columbicrinus Ulrich 1924

†Columbicrinus crassus Ulrich 1925

G. †Geraocrinus Ulrich 1924

†Geraocrinus sculptus Ulrich 1925

G. †Praecursoricrinus Frest et al. 1979

†Praecursoricrinus sulphurensis Frest et al. 1979

Fm. †Homocrinidae Kirk 1914

G. †Apodasmocrinus Warn and Strimple 1977

G. †Bodacrinus Donovan 1986

†Bodacrinus columnus Donovan 1986

G. †Cataraquicrinus Kolata 1983

G. †Daedalocrinus Ulrich 1924

†Daedalocrinus bellevillensis Billings 1883

†Daedalocrinus kirki Ulrich 1925

G. †Difficilicrinus Fres et al. 1979

†Difficilicrinus coneyi Frest et al. 1979

G. †Drymocrinus Ulrich 1924

†Drymocrinus geniculatus Ulrich 1879

†Drymocrinus manitoulinensis Foerste 1924

G. †Ectenocrinus Miller 1889

†Ectenocrinus simplex Hall 1847

Invalid names: Ectenocrinus canadensis Billings 1857 [synonym]

G. †Homocrinus Hall 1852

†Homocrinus parvus Hall 1852

G. †Ibexocrinus Lane 1970

G. †Kastorcrinus Ausich and Copper 2010

†Kastorcrinus chattertoni Ausich and Copper 2010

G. †Penicillicrinus Warn 1982

G. †Sygcaulocrinus Ulrich 1924

†Sygcaulocrinus typus Ulrich 1925

G. †Tunguskocrinus Arendt 1963

Invalid names: Apodasmocrinidae Frest et al. 1979 [synonym], Daedalocrininae Warn and Strimple 1977 [empty], Homocrininae Kirk 1914 [empty], Tunguskocrinidae Arendt 1963 [synonym]

Fm. †Ramacrinidae Prokop 1977

G. †Heracrinus Prokop 1977

G. †Junocrinus Prokop 1977

Diagnosis

Reference	Diagnosis
W. I. Ausich 1998	Disparids with aboral cup composed primi- tively of five lintels, five infrabasals, and three radials (B, C, and E rays), derived forms may lose radials; plate circlets symmetrical about oral-aboral axis; aboral cup cone or bowl shaped, radial facets primitively plenary, and free arms branch.