Placenticeras meeki

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

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

Description

Shells of this species could reach a diameter of about 20 to 50 centimetres (7.9 to 19.7 in), although largest specimen could reach 1 metre (3 ft 3 in). [1] 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 American Palaeontologist Fielding Bradford Meek.

References

  1. ↑ Tsujita, Cameron J; E.G. Westermann, Gerd (1998-11-15). "Ammonoid habitats and habits in the Western Interior Seaway: a case study from the Upper Cretaceous Bearpaw Formation of southern Alberta, Canada" . Palaeogeography, Palaeoclimatology, Palaeoecology. 144 (1): 135–160. doi:10.1016/S0031-0182(98)00090-X. ISSN   0031-0182.


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