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Morphology Ecology and taphonomy   Age range and collections

Ellesmerocerida

Cephalopoda - Ellesmerocerida

Synonymy list
YearName and author
1950Ellesmeroceratida Flower and Kummel, Jr. p. 606
1956Ellesmeroceratida Unklesbay and Young p. 483
1964Ellesmeroceratida Flower p. 28
1964Ellesmerocerida Teichert et al. p. 100
2002Ellesmerocerida Sepkoski, Jr.
2005Ellesmerocerida Evans p. 9
2005Ellesmerocerida Kröger and Mutvei
2011Ellesmerocerida Evans
2011Ellesmerocerida Kröger and Evans
2012Ellesmerocerida Kröger and Lefebvre

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RankNameAuthor
kingdomAnimalia()
Bilateria
EubilateriaAx 1987
Protostomia
Spiralia
RankNameAuthor
Schizocoela
phylumMollusca
classCephalopodaCuvier 1797
orderEllesmerocerida()
orderEllesmerocerida()

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
B. Kröger and H. Mutvei 2005Small cyrto-, ortho- and gomphoceracones, usually laterally compressed or rounded in cross-section, mostly with short chambers. Siphuncle marginal or submarginal, mostly ventral, comparatively wide, sometimes with diaphragms. Siphuncular segments concave with largest diameter at septal necks. Connecting ring of a thick spherulitic–prismatic outer layer. Multiple paired muscle scars located at base of living chamber.