Placenticeras meeki

Placenticeras meeki is an ammonite species from the Late Cretaceous. These cephalopods were fast-moving nektonic carnivores. They mainly lived in the American Interior Basin (Western Interior Seaway).

Placenticeras meeki
Temporal range: Late Cretaceous
Fossil shell of Placenticeras meeki on display at the Museo Civico di Storia Naturale di Milano
Scientific classification
Kingdom:
Animalia
Phylum:
Mollusca
Class:
Cephalopoda
Subclass:
Ammonoidea
Order:
Ammonitida
Superfamily:
Hoplitoidea
Family:
Placenticeratidae
Genus:
Placenticeras
Species:
P. meeki
Binomial name
Placenticeras meeki
(Böhm, 1898)

Description

Shells of this species could reach a diameter of about 1 metre (3 ft 3 in). They are discoidal, involute and compressed. Whorls are stout and rounded to diameter of 3 millimeters. The surface of fossils is usually covered by opalized nacre (ammolite).

Etymology

The name honours Fielding Bradford Meek.

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References


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