Kossmaticeratidae is an extinct

ammonoid Ammonoids are a group of extinct marine mollusc animals in the subclass Ammonoidea of the class Cephalopoda. These molluscs, commonly referred to as ammonites, are more closely related to living coleoids (i.e., octopuses, squid and cuttlefish) ...

family belonging to the order

Ammonitida Ammonitida is an order of ammonoid cephalopods that lived from the Jurassic through Paleocene time periods, commonly with intricate ammonitic sutures. Ammonitida is divided into four suborders, the Phylloceratina, Lytoceratina, Ancyloceratina, a ...

Subfamilies and genera

Kossmaticeratidae includes two subfamilies and eight genera: * Kossmaticeratinae Spath, 1922 ** '' Grossouvrites'' Kilian and Reboul, 1909 ** '' Gunnarites'' Kilian and Reboul, 1909 ** '' Kossmaticeras'' de Grossouvre, 1901 ** '' Maorites'' Marshall, 1926 ** '' Pseudokossmaticeras'' Spath, 1922 * Marshallitinae Matsumoto, 1955 ** '' Eomarshallites'' Medina and Rinaldi, 1986 ** '' Marshallites'' Matsumoto, 1955 ** '' Yokoyamaoceras'' Wright and Matsumoto, 1954

Distribution

Fossils of members within this family have been found in the

Cretaceous The Cretaceous ( ) is a geological period that lasted from about 145 to 66 million years ago (Mya). It is the third and final period of the Mesozoic Era, as well as the longest. At around 79 million years, it is the longest geological period of th ...

sediments of Antarctica, Argentina, Australia, Austria, Belgium, Canada, Chile, France, India, Japan, Madagascar, New Zealand, South Africa, United States as well as in the

Jurassic The Jurassic ( ) is a Geological period, geologic period and System (stratigraphy), stratigraphic system that spanned from the end of the Triassic Period million years ago (Mya) to the beginning of the Cretaceous Period, approximately Mya. The J ...

of the United Kingdom.

References

* Arkell ''et al.'', 1957. Mesozoic Ammonoidea, L374; Treatise on Invertebrate Paleontology Part L (Ammonoidea); Geol Soc of America and Univ Kansas Press. Ammonitida families Oxfordian first appearances Maastrichtian extinctions Desmoceratoidea {{Ammonitina-stub