Trachyceratidae

Trachyceratidae
Temporal range: Devonian - Triassic
Fossil of Protrachyceras psaeudoarchelonus
Scientific classification
Kingdom: Animalia
Phylum: Mollusca
Class: Cephalopoda
Subclass: Ammonoidea
Order: Ceratitida
Superfamily: Clydonitaceae
Family: Trachyceratidae
Haug,1894

The Trachyceratidae is an extinct family of ceratitid ammonoid cephalopods.

The Trachyceratidae makes up part of the superfamily Clydonitaceae along with such families as the Clydonitidae and Arpaditidae. The Clydonitaceae is also known by the junior synonym Trachycerataceae.

Description

Trachyceratid shells are more or less involute and highly ornamented. They have their whorl sides covered with flexious ribs that are usually tuberculate. The venters generally have a median furrow bordered by rows of tubercles or continuous keels.

Selected genera

Fossil record

Fossils of Trachyceratidae are found in marine strata from the Devonianto the Triassic (age range: from : 409.1 to 212.0 million years ago.). Fossils are known from many localities in Afghanistan, Canada, China, Europe, India, Japan, the Russian Federation, Slovenia, Spain, Switzerland, Thailand, Ikraine and United States. [1]

References

This article is issued from Wikipedia - version of the 8/18/2016. The text is available under the Creative Commons Attribution/Share Alike but additional terms may apply for the media files.