Lytoceras
| Lytoceras Temporal range: from Sinemurian to Cenomanian[1]196.5–99.7 Ma | |
|---|---|
 | |
| Lytoceras fimbriatum | |
| Scientific classification | |
| Kingdom: | Animalia |
| Phylum: | Mollusca |
| Class: | Cephalopoda |
| Order: | Lytoceratida |
| Family: | Lytoceratidae |
| Genus: | Lytoceras Suess, 1865 |
Lytoceras is an ammonite genus that was extant during most of the Jurassic and Cretaceous periods, and is the type genus for the family Lytoceratidae. These cephalopods were fast-moving nektonic carnivores.
Species
- Lytoceras aulaeum Anderson 1938
- Lytoceras baconicum Vadasz 1910
- Lytoceras batesi Trask
- Lytoceras belliseptatiforme Collignon 1962
- Lytoceras cornucopia Young and Bird 1822
- Lytoceras crenatum Buckman 1926
- Lytoceras eudesianum (Orbigny 1845)
- Lytoceras fimbriatoides Gemmellaro 1884
- Lytoceras fimbriatum Sowerby 1817
- Lytoceras fraasi Dacqué 1910
- Lytoceras francisci Oppel 1865
- Lytoceras fuggeri Geyer 1893
- Lytoceras furcicrenatum Buckman 1928
- Lytoceras juillieti (Orbigny 1841)
- Lytoceras ovimontanum Geyer 1893
- Lytoceras polycyclum Neumayr 1873
- Lytoceras polyanchomenum (Gemellaro 1872)
- Lytoceras praesublineatum Fucini 1899
- Lytoceras richei Sayn 1901
- Lytoceras saturnale Anderson 1938
- Lytoceras sepositum Meneghini 1875
- Lytoceras subfimbriatum (Orbigny 1841)
- Lytoceras sutile Oppel 1868
- Lytoceras trompianum Hauer 1861
- Lytoceras villae Meneghini 1874
Description
Shells of Lytoceras are evolute, round or quadrate in section, covered with crinkled growth lines or riblets, and may have slight constrictions on internal molds. Some have fine strigations, (parallel grooves running longitudinally along the flanks).
Distribution
Fossils of species within this genus have been found in the Jurassic and Cretaceous rocks all over the world, particularly in Western Europe, in Madagascar, South Africa and United States. [2]
References
- ↑ Sepkoski, Jack (2002). "Sepkoski's Online Genus Database". Retrieved 2014-05-28.
- 1 2 3 The Paleobiology Database
- Systematic descriptions, Mesozoic Ammonoidea, by W.J Arkell, Bernhard Kummel, and C.W. Wright. 1957. Treatise on Invertebrate Paleontology, Part L. Geological Society of America and University of Kansas press.
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