Megalytoceras
| Megalytoceras Temporal range: Toarcian–Bajocian[1] | |
|---|---|
| Scientific classification | |
| Kingdom: | Animalia |
| Phylum: | Mollusca |
| Class: | Cephalopoda |
| Subclass: | Ammonoidea |
| Order: | Ammonitida |
| Suborder: | Lytoceratina |
| Family: | Lytoceratidae |
| Genus: | Megalytoceras Buckman, 1905 |
| Species [2] | |
| |
Megalytoceras is an extinct ammonite cephalopod from the middle Jurassic, belonging to the suborder Lytoceratina.
The shell of Megalytoceras is evolute and grew be fairly large, to as much as 24.5 cm. (8 3/4 in.) in diameter in M. amplum, from the Aalenian of France. Early whorls are elliptical in section and bear periodic flares. Later, or outer, whorls are smooth with convergent sides. The outer rim, or venter, is rounded. Embracement of previous whorls by the next is slight to mild. The umbilicus is rather wide, with an abrupt edge.
Megalytoceras and its close relative Metrolytoceras are included in the Megalytoceratinae
Distribution
Jurassic of Spain. [2]
External Links
- Megalytoceras BUCKMAN, 1905 (in French)
- Megalytoceras amplum (in French)
References
- Notes
- ↑ Sepkoski, Jack (2002). "Sepkoski's Online Genus Database". Retrieved 2014-05-28.
- ↑ 2.0 2.1 "Paleobiology Database - Megalytoceras". Retrieved 2014-05-28.
- Bibliography
- Arkell, W.J.; Kummel, B.; Wright, C.W. (1957). Mesozoic Ammonoidea. Treatise on Invertebrate Paleontology, Part L, Mollusca 4. Lawrence, Kansas: Geological Society of America and University of Kansas Press.