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Nucleolites (Pygorhynchus)

Echinoidea - Disasteridae

Taxonomy
Pygorhynchus was named as a genus. It is not extant.

It was reranked as Nucleolites (Pygorhynchus) by Forbes (1846); it was reranked as Cassidulus (Pygorhynchus) by Clark and Twitchell (1915).

It was assigned to Nucleolites by Forbes (1846); to Cassidulus by Clark and Twitchell (1915); to Nucleolitidae by Kier (1966); and to Cassiduloida by Sepkoski (2002).

Synonymy list
YearName and author
1846Nucleolites (Pygorhynchus) Forbes p. 161
1915Cassidulus (Pygorhynchus) Clark and Twitchell p. 171
1966Pygorhynchus Kier p. U506
2002Pygorhynchus Sepkoski, Jr.

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RankNameAuthor
kingdomAnimalia()
Triploblastica
Nephrozoa
Deuterostomia
Ambulacraria
phylumEchinodermata
subphylumEchinozoa
classEchinoidea()
RankNameAuthor
subclassEuechinoideaBronn 1860
superorderAcroechinoidea()
Carinacea
Irregularia()
Atelostomata
familyDisasteridae
genusNucleolites
subgenusPygorhynchus()

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