Phylloceras

Phylloceras
Temporal range: Early Jurassic–Late Cretaceous[1]
Artist's reconstruction
Fossil shell of Phylloceras species
Scientific classification
Class: Cephalopoda
Subclass: Ammonoidea
Order: Ammonitida
Family: Phylloceratidae
Subfamily: Phylloceratinae
Genus: Phylloceras
Suess 1865[2]

Phylloceras is an extinct genus of ammonoid cephalopods belonging to the family Phylloceratidae. These nektonic carnivores lived from Early Jurassic (Hettangian age) to Late Cretaceous (Maastrichtian age) (from 201.30 to 66.043 Ma). [1][2]

Species

[2]

Description

Shells of Phylloceras can reach a diameter of about 8–10 centimetres (3.1–3.9 in), with a maximun of about 20 centimetres (7.9 in). Thes primitive ammonites had an involute, laterally flattened shell with a regular shell opening. They were almost smooth and the ornamentation was virtually absent or, at most, represented by simple growth lines barely visible. The striking sinuous suture lines were characteristic of this genus. They are reminiscent, in some ways, of the leaves of plants (hence the name Phylloceras, which means " leaf-horn").

Distribution

Fossils of species within this genus have been found all over the world, particularly in Western Europe. [2]

References

  1. 1 2 Sepkoski, Jack (2002). "Sepkoski's Online Genus Database". Retrieved 2014-05-28.
  2. 1 2 3 4 The Paleobiology Database
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