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Morphology Ecology and taphonomy   Age range and collections

Quadragnostus

Trilobita - Agnostida - Metagnostidae

Taxonomy
Quadragnostus was named by Howell (1966) [Sepkoski's age data: Cm uMid]. It is not extant.

It was assigned to Agnostida by Sepkoski (2002); and to Metagnostidae by Jell and Adrain (2003).

Synonymy list
YearName and author
1966Quadragnostus Howell
2002Quadragnostus Sepkoski, Jr.
2003Quadragnostus Jell and Adrain p. 437

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RankNameAuthor
kingdomAnimalia()
Bilateria
EubilateriaAx 1987
Protostomia
Ecdysozoa
Panarthropoda
RankNameAuthor
phylumArthropodaLatreille 1829
subphylumMandibulata
classTrilobitaWalch 1771
orderAgnostidaSalter 1864
familyMetagnostidaeJaekel 1909
genusQuadragnostusHowell 1966

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