Orthoceratacea M'Coy, 1844

Kröger, Björn, 2004, Revision of Middle Ordovician orthoceratacean nautiloids from Baltoscandia, Acta Palaeontologica Polonica 49 (1), pp. 57-74 : 59

publication ID

https://doi.org/ 10.5281/zenodo.13272378

persistent identifier

https://treatment.plazi.org/id/03F28786-B171-FF92-FFE4-FD486E81DDA2

treatment provided by

Felipe

scientific name

Orthoceratacea M'Coy, 1844
status

 

Superfamily Orthoceratacea M'Coy, 1844 [nom.

transl. Sweet 1964 ex Orthoceratidae M’Coy, 1844 ]

Diagnosis.—The shell of the Orthoceratacea is straight or slightly curved and smooth or ornamented and has a circular cross section. The siphuncle is central or subcentral with ortho− suborthochoanitic and seldom secondarily cyrtochoanitic, septal necks. Endosiphuncular and cameral deposits may occur.

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