Peltoceratinae
| Peltoceratinae Temporal range: Middle Jurassic–Upper Jurassic | |
|---|---|
 | |
| Fossil shell of Peltoceras arduennense from Calvados (France), on display at Galerie de paléontologie et d'anatomie comparée in Paris | |
| Scientific classification | |
| Kingdom: | Animalia |
| Phylum: | Mollusca |
| Class: | Cephalopoda |
| Subclass: | Ammonoidea |
| Order: | Ammonitida |
| Suborder: | Ammonitina |
| Superfamily: | Perisphinctoidea |
| Family: | Aspidoceratidae |
| Subfamily: | Peltoceratinae Spath, 1924 |
The Peltoceratinae comprise a subfamily in the Aspidoceratidae, (middle and upper Jurassic perisphinctacean ammonites).
Genera in the Peltoceratinae have sharply ribbed inner whorls and outer whorls that bear spines or tubercles, or have coarse simple ribs. Among these are giant forms with simple peristomes (aperture openings) that occur along with smaller forms with lappets.
Derivation of the Peltoceratinae seems most likely to be from the Pseudoperisphinctinae.
References
- Arkell et al., 1957. Mesozoic Ammonoidea. Treatise on Invertebrate Paleontology, Part L (Ammonoidea). Geol Soc of America and Univ Kansas Press.
This article is issued from Wikipedia - version of the Friday, June 06, 2014. The text is available under the Creative Commons Attribution/Share Alike but additional terms may apply for the media files.