Asthenoceras
| Asthenoceras Temporal range: Bajocian[1] | |
|---|---|
| Scientific classification | |
| Kingdom: | Animalia |
| Phylum: | Mollusca |
| Class: | Cephalopoda |
| Subclass: | Ammonoidea |
| Order: | Ammonitida |
| Superfamily: | Hildocerataceae |
| Family: | Hildoceratidae |
| Genus: | Asthenoceras Buckman, 1899 |
| Species | |
|
See text. | |
Asthenoceras is a dwarfish, Middle Jurassic (Lower Bajocian) ammonoid with an evolute, smooth, compressed, discoidal, strongly keeled shell. Asthenoceras belongs to the Hildoceratidae (subfamily Grammoceratinae) and may be a subgenus of the Lower Jurassic (Upper Toarcian) Grammoceras.
References
- ↑ Sepkoski, Jack (2002). "Sepkoski's Online Genus Database". Retrieved 2014-05-28.
- 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.
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