Kossmaticeratidae
Kossmaticeratidae is an extinct ammonoid family belonging to the order Ammonitida. 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 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 ...
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Kossmaticeras
''Kossmaticeras'' is an extinct ammonoid genus belonging to the desmoceratacean family Kossmaticeratidae. Species in this genus were fast-moving nektonic carnivores. They lived during the Late Cretaceous, from upper Turonian to upper Maastrichtian age.Sepkoski, JacSepkoski's Online Genus Database – Cephalopoda/ref> The type species of the genus is ''Ammonites theobaldianus''. Subgenera and species * ''Kossmaticeras (Karapadites)'' Collignon, 1954 ** ''Kossmaticeras (Karapadites) besairieri'' Collignon, 1954 ** ''Kossmaticeras (Karapadites) karapadensis'' Kossmat, 1897 ** ''Kossmaticeras (Karapadites) madrasinus'' Stoliczka, 1865 ** ''Kossmaticeras (Karapadites) planissimus'' Collignon, 1966 * ''Kossmaticeras (Kossmaticeras)'' de Grossouvre, 1901 ** ''Kossmaticeras (Kossmaticeras) inornatum'' Collignon, 1966 ** ''Kossmaticeras (Kossmaticeras) jeletzkyi'' Collignon, 1965 ** ''Kossmaticeras (Kossmaticeras) jonesi'' Collignon, 1965 ** ''Kossmaticeras (Kossmaticeras) kilenensis ...
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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 Jurassic constitutes the middle period of the Mesozoic, Mesozoic Era and is named after the Jura Mountains, where limestone strata from the period were first identified. The start of the Jurassic was marked by the major Triassic–Jurassic extinction event, associated with the eruption of the Central Atlantic magmatic province, Central Atlantic Magmatic Province. The beginning of the Toarcian Stage started around 183 million years ago and is marked by an extinction event associated with widespread Anoxic event, oceanic anoxia, ocean acidification, and elevated temperatures likely caused by the eruption of the Karoo-Ferrar, Karoo-Ferrar large igneous provinces. The end of the Jurassic, however, has no clear boundary with the Cretaceous and i ...
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Oxfordian First Appearances
Oxfordian may refer to: *Oxfordian (stage), a geological time interval in the Jurassic period *Oxfordian theory of Shakespeare authorship, the view that Edward de Vere wrote under Shakespeare's name *A person or thing associated with Oxford or Oxford University Oxford () is a city in England. It is the county town and only city of Oxfordshire. In 2020, its population was estimated at 151,584. It is north-west of London, south-east of Birmingham and north-east of Bristol. The city is home to the ...

Ammonitida Families
Ammonitida is an order of Ammonoidea, 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, and Ammonitina. The Phylloceratina is the ancestral stock, derived from the Ceratitida near the end of the Triassic. The Phylloceratina gave rise to the Lytoceratina near the beginning of the Jurassic which in turn gave rise to the highly specialized Ancyloceratina near the end of the Jurassic. Both the Phylloceratina and Lytoceratina gave rise to various stocks combined in the Ammonitina. These four suborders are further divided into different stocks, comprising various families combined into superfamilies. Some like the Hildoceratoidea and Stephanoceratoidea are restricted to the Jurassic. Others like the Hoplitoidea and Acanthoceratoidea are known only from the Cretaceous. Still others like the Perisphinctoidea are found ...
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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 the entire Phanerozoic. The name is derived from the Latin ''creta'', "chalk", which is abundant in the latter half of the period. It is usually abbreviated K, for its German translation ''Kreide''. The Cretaceous was a period with a relatively warm climate, resulting in high eustatic sea levels that created numerous shallow inland seas. These oceans and seas were populated with now- extinct marine reptiles, ammonites, and rudists, while dinosaurs continued to dominate on land. The world was ice free, and forests extended to the poles. During this time, new groups of mammals and birds appeared. During the Early Cretaceous, flowering plants appeared and began to rapidly diversify, becoming the dominant group of plants across the Earth b ...
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