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Holdenia

Trilobita - Ptychopariida - Isocolidae

Taxonomy

Synonymy list
YearName and author
1953Holdenia Cooper
1956Holdenia Whittington
2002Holdenia Sepkoski, Jr.
2003Holdenia Jell and Adrain p. 384

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RankNameAuthor
kingdomAnimalia()
Bilateria
EubilateriaAx 1987
Protostomia
Ecdysozoa
Panarthropoda
RankNameAuthor
phylumArthropodaLatreille 1829
subphylumMandibulata
classTrilobitaWalch 1771
orderPtychopariidaSwinnerton 1915
familyIsocolidaeAngelin 1854
genusHoldenia

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