Nannolytoceras
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Nannolytoceras is an extinct genus of lytoceratid ammonite, family Lytoceratidae, with a stratigraphic range extending from the Bajocian age to Bathonian age (Medium Jurassic).[1]
Description
Shells of Nannolytoceras species reach a diameter of about Script error: No such module "convert"..[2][3] The shell is evolute, smooth, tubular to compressed, with a variable number of more or less regularly spaced deep constrictions.[3] The very thin ribs crossing the ventral region are barely visible. Umbilicus is relatively large. The suture line is of ammonitic type.[4] These cephalopods were fast-moving nektonic carnivores.[5]
Distribution
Fossils of species within this genus have been found in the Jurassic rocks of Italy, Spain,[5] Slovakia,[6] and France.[7]
References
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- ↑ Script error: No such module "Citation/CS1".
- ↑ Ammonites Nannolytoceras - Nannolytoceras tripartitum
- ↑ a b Ammonites.fr
- ↑ Redjaen
- ↑ a b Paleobiology Database - Nannolytoceras. 2017-10-19.
- ↑ Schlögl Ján (2001). Sedimentológia a biostratigrafia červených hľuznatých vápencov čorštýnskeho súvrstvia ("Ammonitico Rosso") v pieninskom bradlovom pásme.
- ↑ Script error: No such module "Citation/CS1".
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