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Cheirocystis

Rhombifera - Cheirocrinidae

Taxonomy
Cheirocystis was named by Paul (1972) [Sepkoski's age data: O Aren-u O Cara-l Sepkoski's reference number: 326]. Its type is Echinoencrinites anatiformis.

It was assigned to Rhombifera by Sepkoski (2002); and to Cheirocrinidae by Paul (1972), Sumrall and Schumacher (2002) and Paul and Rozhnov (2016).

Synonymy list
YearName and author
1972Cheirocystis Paul p. 36
2002Cheirocystis Sepkoski, Jr.
2002Cheirocystis Sumrall and Schumacher p. 848
2016Cheirocystis Paul and Rozhnov p. 270

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RankNameAuthor
kingdomAnimalia()
Triploblastica
Nephrozoa
Deuterostomia
Ambulacraria
phylumEchinodermata
RankNameAuthor
subphylumBlastozoaSprinkle 1973
classRhombiferaZittel 1879
superfamilyGlyptocystitoidaBather 1899
familyCheirocrinidaeJaekel 1899
genusCheirocystis

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.

Diagnosis
ReferenceDiagnosis
C. R. C. Paul 1972A genus of Cheirocrinidae with all plate circlets closed, six radial plates; short ambulacra confined to flat oral surface; 8-16 disjunct pectinirhombs.