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).
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
- ^ 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.
- Ammonites
- J.B. Reeside A comparison of the genera Metaplacenticeras Spath and Platcenticeras Meek Professional Paper - United States Geological Survey
- Sepkoski, Jack Sepkoski's Online Genus Database – Cephalopodes
You must be logged in to post a comment.