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Asthenoceras

Cephalopoda - Ammonitida - Sonniniidae

Taxonomy
Asthenoceras is a genus. It is not extant. Its type is Grammoceras nannodes.

It was assigned to Grammoceratinae by Westermann (1969); to Ammonoidea by Sepkoski (2002); and to Witchelliinae by Howarth (2013).

Species

Synonymy list
YearName and author
1969Asthenoceras Westermann p. 58
2002Asthenoceras Sepkoski
2013Asthenoceras Howarth p. 119

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RankNameAuthor
kingdomAnimalia()
Bilateria
EubilateriaAx 1987
Protostomia
Spiralia
superphylumLophotrochozoa
phylumMollusca
classCephalopodaCuvier 1797
RankNameAuthor
subclassAmmonoidea()
orderAmmonitida
suborderAmmonitinaHyatt 1889
superfamilyHildoceratoidea(Hyatt 1867)
familySonniniidaeBuckman 1892
subfamilyWitchelliinaeCallomon and Chandler 2006
genusAsthenoceras

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.

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Asthenoceras nannodes Buckman 1890
Diagnosis
No diagnoses are available