Pleuroceras spinatum

Pleuroceras spinatum is a species of ammonite from the lower Jurassic, upper Pliensbachian period (189.6 ± 1.5 – 183.0 ± 1.5 Mya). Species of this genus were fast-moving nektonic carnivore.^[1]

Pleuroceras spinatum Temporal range: Lower Jurassic, 189.6–183 Ma PreꞒ Ꞓ O S D C P T J K Pg N [1]
Fossil shells of Pleuroceras spinatum from Lyme Regis (England), on display at Galerie de paléontologie et d'anatomie comparée in Paris
Scientific classification
Kingdom:	Animalia
Phylum:	Mollusca
Class:	Cephalopoda
Subclass:	†Ammonoidea
Order:	†Ammonitida
Family:	†Amaltheidae
Genus:	†Pleuroceras
Species:	†P. spinatum
Binomial name
†Pleuroceras spinatum Bruguière 1789
Synonyms
Ammonites costatus Schlotheim, 1820 Ammonites franconicus Schlotheim, 1813

Description

Shell of Pleuroceras spinatum can reach a diameter of about 45–54 millimetres (1.8–2.1 in).These ammonites have a planulate shell with a quadrate whorl section, bearing strong radial ribs ending in ventro-lateral tubercles. The venter is tabulate with a strong serrated keel. ^[1]

Distribution

Fossils of this species have been found in the Jurassic of France, Germany, Hungary, Italy, Serbia and Montenegro, Spain and United Kingdom.^[1]