Basic info Taxonomic history Classification Relationships
Morphology Ecology and taphonomy   Age range and collections

Hemicidaroidea

Echinoidea - Hemicidaroidea

Taxonomy
Hemicidarina was named by Beurlen (1937).

It was reranked as the order Hemicidaroida by Durham and Melville (1957), Fell and Pawson (1966) and Sepkoski (2002); it was reranked as the order Hemicidaroidea by Berndt (2003).

It was assigned to Echinacea by Durham and Melville (1957) and Fell and Pawson (1966); and to Echinoidea by Sepkoski (2002) and Berndt (2003).

Synonymy list
YearName and author
1957Hemicidaroida Durham and Melville p. 254
1966Hemicidaroida Fell and Pawson p. U381
2002Hemicidaroida Sepkoski, Jr.
2003Hemicidaroidea Berndt p. 78

Is something missing? Join the Paleobiology Database and enter the data

RankNameAuthor
kingdomAnimalia()
Triploblastica
Nephrozoa
Deuterostomia
Ambulacraria
RankNameAuthor
phylumEchinodermata
subphylumEchinozoa
classEchinoidea()
orderHemicidaroidea()
orderHemicidaroidea()

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