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Helodiadema

Echinoidea - Diadematoida

Taxonomy
Helodiadema is a genus. It is not extant.

It was assigned to Diadematoida by Fell (1966) and Sepkoski (2002).

Synonymy list
YearName and author
1966Helodiadema Fell p. U355
2002Helodiadema Sepkoski, Jr.

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RankNameAuthor
kingdomAnimalia()
Triploblastica
Nephrozoa
Deuterostomia
Ambulacraria
phylumEchinodermata
RankNameAuthor
subphylumEchinozoa
classEchinoidea()
subclassEuechinoideaBronn 1860
superorderAcroechinoidea()
orderDiadematoida
genusHelodiadema

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