Basic info Taxonomic history Classification Relationships
Morphology Ecology and taphonomy   Age range and collections

Ptychagnostidae

Trilobita - Agnostida - Ptychagnostidae

Synonymy list
YearName and author
1939Ptychagnostidae Kobayashi
1996Ptychagnostidae Westrop et al. pp. 812, 816
1997Ptychagnostidae Whittington et al. p. 350
2003Ptychagnostidae Hong et al.

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RankNameAuthor
kingdomAnimalia()
Bilateria
EubilateriaAx 1987
Protostomia
Ecdysozoa
Panarthropoda
RankNameAuthor
phylumArthropodaLatreille 1829
subphylumMandibulata
classTrilobitaWalch 1771
orderAgnostidaSalter 1864
familyPtychagnostidaeKobayashi 1939
familyPtychagnostidaeKobayashi 1939

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