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Pachyaspis

Trilobita - Ptychopariida - Ptychopariidae

Taxonomy
Pachyaspis was named by Resser (1938) [Sepkoski's age data: Cm Tojo Cm mMid-l Sepkoski's reference number: 16,81]. It is not extant.

It was assigned to Ptychopariida by Eddy and McCollum (1998) and Sepkoski (2002); and to Ptychopariidae by Jell and Adrain (2003).

Synonymy list
YearName and author
1938Pachyaspis Resser
1998Pachyaspis Eddy and McCollum p. 881
2002Pachyaspis Sepkoski, Jr.
2003Pachyaspis Jell and Adrain p. 416

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RankNameAuthor
kingdomAnimalia()
Bilateria
EubilateriaAx 1987
Protostomia
Ecdysozoa
Panarthropoda
RankNameAuthor
phylumArthropodaLatreille 1829
subphylumMandibulata
classTrilobitaWalch 1771
orderPtychopariidaSwinnerton 1915
familyPtychopariidaeMatthew 1887
genusPachyaspisResser 1938

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