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Hadragnostus

Trilobita - Agnostida - Agnostidae

Taxonomy
Hadragnostus was named by Opik (1967) [Sepkoski's age data: Cm uMid-u Cm Dres-l Sepkoski's reference number: 16]. It is not extant.

It was assigned to Agnostidae by Whittington et al. (1997); to Agnostida by Sepkoski (2002); and to Ammagnostidae by Jell and Adrain (2003).

Synonyms
Synonymy list
YearName and author
1967Hadragnostus Opik
1984Kunshanagnostus Qian and Zhou
1997Hadragnostus Whittington et al. p. 344
2002Hadragnostus Sepkoski, Jr.
2003Hadragnostus Jell and Adrain p. 381

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RankNameAuthor
kingdomAnimalia()
Bilateria
EubilateriaAx 1987
Protostomia
Ecdysozoa
Panarthropoda
RankNameAuthor
phylumArthropodaLatreille 1829
subphylumMandibulata
classTrilobitaWalch 1771
orderAgnostidaSalter 1864
familyAgnostidaeM'Coy 1849
genusHadragnostusOpik 1967

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