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Morphology Ecology and taphonomy   Age range and collections

Hadrocystis

Rhombifera - Cheirocrinidae

Taxonomy
Hadrocystis was named by Sprinkle (1974) [Sepkoski's age data: O Llvi-u O Cara-m Sepkoski's reference number: 325,532]. It is not extant.

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

Species lacking formal opinion data

View classification of included taxa

Synonymy list
YearName and author
1974Hadrocystis Sprinkle
2002Hadrocystis Sepkoski, Jr.
2016Hadrocystis 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
genusHadrocystisSprinkle 1974

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
No diagnoses are available