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Aphelaeceras

Cephalopoda - Nautilida - Trigonoceratidae

Taxonomy
Aphelaeceras was named by Hyatt (1884) [Sepkoski's age data: C Tour-u C Serp-l Sepkoski's reference number: 524].

It was assigned to Nautilida by Sepkoski (2002); and to Trigonoceratidae by Hyatt (1894), Teichert et al. (1964) and Niko and Mapes (2007).

Synonymy list
YearName and author
1884Aphelaeceras Hyatt
1894Apheleceras Hyatt p. 539
1964Aphelaeceras Teichert et al. p. 428
2002Aphelaeceras Sepkoski, Jr.
2007Aphelaeceras Niko and Mapes p. 294

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RankNameAuthor
kingdomAnimalia()
Bilateria
EubilateriaAx 1987
Protostomia
Spiralia
Schizocoela
phylumMollusca
RankNameAuthor
classCephalopodaCuvier 1797
subclassNautiloideaAgassiz 1847
orderNautilidaAgassiz 1847
superfamilyTrigonoceratoidea(Hyatt 1884)
familyTrigonoceratidae
genusAphelaecerasHyatt 1884

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
ReferenceDiagnosis
S. Niko and R. H. Mapes 2007Like Epistroboceras, but its flanks in adoral whorls are non-angulated because of the obsolescence of the ventrolateral grooves that are present in the earlier ontogenetic growth stages.