Kingdom Animalia Family Placenticeratidae Genus Placenticeras Order Ammonitida | Superfamily Hoplitaceae Phylum Mollusca Rank Species Subclass Ammonites | |
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Similar Placenticeras, Ammonites, Pseudothurmannia, Pleuroceras solare, Progeronia | ||
gem ammonite placenticeras meeki late cretaceous bearpaw formation st mary s river alberta
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).
Contents
gem ammonite placenticeras meeki late cretaceous bearpaw formation st mary s river alberta
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.
References
Placenticeras meeki Wikipedia(Text) CC BY-SA