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

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).

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

Is something missing? Join the Paleobiology Database and enter the data

RankNameAuthor
kingdomAnimalia()
Bilateria
EubilateriaAx 1987
Protostomia
Spiralia
Schizocoela
phylumMollusca
classCephalopodaCuvier 1797
RankNameAuthor
subclassAmmonoidea(Zittel 1884)
orderAmmonitidaHyatt 1889
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.

Diagnosis
No diagnoses are available