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Ptychagnostus (Acidusus)

Trilobita - Agnostida - Ptychagnostidae

Taxonomy
Ptychagnostus (Acidusus) was named by Opik (1979) [Sepkoski's age data: Cm uMid-l Cm uMid-u]. Its type is Agnostus atavus.

It was reranked as Acidusus by Sepkoski (2002) and Weidner and Nielsen (2014).

It was assigned to Ptychagnostus by Opik (1979); to Agnostida by Sepkoski (2002); and to Ptychagnostidae by Weidner and Nielsen (2014).

Synonymy list
YearName and author
1979Ptychagnostus (Acidusus) Opik
2002Acidusus Sepkoski, Jr.
2014Acidusus Weidner and Nielsen p. 32

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RankNameAuthor
kingdomAnimalia()
Bilateria
EubilateriaAx 1987
Protostomia
Ecdysozoa
Panarthropoda
phylumArthropodaLatreille 1829
RankNameAuthor
subphylumMandibulata
classTrilobitaWalch 1771
orderAgnostidaSalter 1864
familyPtychagnostidaeKobayashi 1939
genusPtychagnostusJaekel 1909
subgenusAcidususOpik 1979

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