''Strophiceras'' is an extinct genus of cephalopods from the Order
Nautilida
The Nautilida constitute a large and diverse order of generally coiled nautiloid cephalopods that began in the mid Paleozoic and continues to the present with a single family, the Nautilidae which includes two genera, ''Nautilus'' and ''Allonauti ...
, which includes, in a separate family, ''
Nautilus
The nautilus (, ) is a pelagic marine mollusc of the cephalopod family Nautilidae. The nautilus is the sole extant family of the superfamily Nautilaceae and of its smaller but near equal suborder, Nautilina.
It comprises six living species in ...
'' and ''
Allonautilus
The genus ''Allonautilus'' contains two species of nautiluses, which have a significantly different morphology from those placed in the sister taxon '' Nautilus''. ''Allonautilus'' is now thought to be a descendant of ''Nautilus'', rendering t ...
''.
''Strophioceras'', a gyrogonic form that comes from the Middle
Devonian of Europe and named by Hyatt in 1844 is part of the Trigonoceratacean family
Centroceratidae
The Centroceratidae is the ancestral family of the Trigonoceratoidea and of the equivalent Centroceratina; extinct shelled cephalopods belonging to the order Nautilida
Diagnosis
The Centroceratidae, which range from the Middle Devonian to the ...
which was extant from the Devonian to the
Early Permian. ( 1954. Flower 1950)
Description
See also
*
Nautiloid
Nautiloids are a group of marine cephalopods (Mollusca) which originated in the Late Cambrian and are represented today by the living ''Nautilus'' and '' Allonautilus''. Fossil nautiloids are diverse and speciose, with over 2,500 recorded specie ...
ea
*
Nautilida
The Nautilida constitute a large and diverse order of generally coiled nautiloid cephalopods that began in the mid Paleozoic and continues to the present with a single family, the Nautilidae which includes two genera, ''Nautilus'' and ''Allonauti ...
**
List of nautiloids
This list of nautiloids is a comprehensive listing of all genera that have ever been included in the subclass Nautiloidea, excluding purely vernacular terms. The list includes all commonly accepted genera, but also genera that are now considered in ...
References
* Flower ''and Kummel'' 1950. A Classification of the Nautiloidea; Jour Paleontology, 24(5), 606–616, Nov 1950.
* , B. 1964. Nautiloidea - Nautilida;
Treatise on Invertebrate Paleontology
The ''Treatise on Invertebrate Paleontology'' (or ''TIP'') published by the Geological Society of America and the University of Kansas Press, is a definitive multi-authored work of some 50 volumes, written by more than 300 paleontologists, and co ...
Part K, Mollusca 3; R.C. Moore (ed), Univ. Kans. press.
* Sepkoski, J.J. Jr. 2002. A compendium of fossil marine animal genera. D.J. Jablonski & M.L. Foote (eds.). ''Bulletins of American Paleontology'' 363: 1–560
Sepkoski's Online Genus Database (CEPHALOPODA)
Prehistoric nautiloid genera
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