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Erixanium

Trilobita - Asaphida - Aphelaspididae

Taxonomy
Erixanium was named by Opik (1963) [Sepkoski's age data: Cm Dres-u Cm Fran-l Sepkoski's reference number: 16,489]. It is not extant. Its type is Erixanium sentum.

It was assigned to Ptychopariida by Sepkoski (2002); and to Aphelaspididae by Jell and Adrain (2003).

Synonymy list
YearName and author
1963Erixanium Opik
2002Erixanium Sepkoski, Jr.
2003Erixanium Jell and Adrain p. 374

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RankNameAuthor
kingdomAnimalia()
Bilateria
EubilateriaAx 1987
Protostomia
Ecdysozoa
Panarthropoda
phylumArthropodaLatreille 1829
RankNameAuthor
subphylumMandibulata
classTrilobitaWalch 1771
subclassLibristomaFortey 1990
orderAsaphidaSalter 1864
familyAphelaspididaePalmer 1960
genusErixaniumOpik 1963

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