Skirroceras macrum

Skirroceras macrum is a Stephanoceratacean (ammonite) species belonging to the family Stephanoceratidae.

Skirroceras macrum
Temporal range: Jurassic (Bajocian), 171.6–167.7 Ma
[1]
Fossil of Skirroceras macrum from France, on display at the Museo Civico di Storia Naturale di Milano
Fossil
Scientific classification
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S. macrum
Binomial name
Skirroceras macrum
(von Quenstedt)

These fast-moving nektonic carnivores lived during the Jurassic period, in the Bajocian age.[2]

Description

Skirroceras macrum has an evolute shell reaching about 11.5 centimetres (4.5 in) of diameter. These ammonites are heavily ribbed, with characteristic nodes.

Distribution

Fossils of Skirroceras macrum are found in the Middle Jurassic Bajocian age marine strata of England and France.[3]

References


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