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Hemistreptacron

Crinoidea - Cladida

Taxonomy
Hemistreptacron was named by Yakovlev (1926) [Sepkoski's age data: P l P Guad-u]. It is not extant.

It was assigned to Cladida by Sepkoski (2002).

Synonymy list
YearName and author
1926Hemistreptacron Yakovlev
2002Hemistreptacron Sepkoski, Jr.

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RankNameAuthor
kingdomAnimalia()
Triploblastica
Nephrozoa
Deuterostomia
Ambulacraria
phylumEchinodermata
RankNameAuthor
classCrinoideaMiller 1821
subclassPentacrinoideaJaekel 1918
infraclassInadunata(Wachsmuth and Springer 1897)
orderCladida(Moore and Laudon 1943)
genusHemistreptacronYakovlev 1926

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