Ceratitida

	Ceratitida Ceratitida is an order that contains almost all ammonoid cephalopod genera from the Triassic as well as ancestral forms from the Upper Permian, the exception being the phylloceratids which gave rise to the great diversity of post-Triassic ammonites. Ceratitids overwhelmingly produced planospirally coiled discoidal shells that may be evolute with inner whorls exposed or involute with only the outer whorl showing. In a few later forms the shell became subglobular, in others, trochoidal or uncoiled. Sutures are typically ceratitic, with smooth saddles and serrate or digitized lobes. In a few the sutures are goniatitic while in others they are ammonitic. Taxonomy * Ceratitida Ceratitoidea Choristoceratoidea Clydonitoidea Danubitoidea Dinaritoidea Lobitoidea Meekoceratoidea Megaphyllitoidea Nathorstitoidea Noritoidea Otoceratoidea Pinacoceratoidea Ptychitoidea Sageceratoidea Tropitoidea Xenodiscoidea Only eight superfamilies ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu]
	Ceratitoidea Ceratitoidea, formerly Ceratitaceae, is an ammonite superfamily in order Ceratitida characterized in general by highly ornamented or tubercle, tuberculate shells with ceratitic Suture (anatomy), sutures that may become goniatitic or ammonitic in some offshoots. (Arkell ''et al.'' 1962) Phylo-taxonomy The Ceratitoidea, according to the ''Treatise on Invertebrate Paleontology'' (fig. 149, L104) can be divided into the Lower Triassic Hellenitidae, Dinaritidae, Tirolitidae, and Stephanitidae; the essentially lower Middle Triassic Acrochordiceratidae, Beyrichitidae, and Proteusitidae; and the lower Middle and post lower Middle Triassic Ceratitidae and its descendant families. Families descendent from the Ceratidae are the Aplococeratidae and possibly or coeval, the Balatonitidae, Danubitidae, and Hungaritidae, and from the Hungaritidae, the Carnitidae. Of these the Balatonitidae and Danubitidae are restricted to the Anisian (lower Middle Triassic); the Ceratitidae and Hungaritidae t ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu]
picture info	Ammonoidea Ammonoids are extinct, (typically) coiled-shelled cephalopods comprising the subclass Ammonoidea. They are more closely related to living octopuses, squid, and cuttlefish (which comprise the clade Coleoidea) than they are to nautiluses (family Nautilidae). The earliest ammonoids appeared during the Emsian stage of the Early Devonian (410.62 million years ago), with the last species vanishing during or soon after the Cretaceous–Paleogene extinction event (66 million years ago). They are often called ammonites, which is most frequently used for members of the order Ammonitida, the only remaining group of ammonoids from the Jurassic up until their extinction. Ammonoids exhibited considerable diversity over their evolutionary history, with over 10,000 species having been described. Ammonoids are excellent index fossils, and they have been frequently used to link rock layers in which a particular species or genus is found to specific Geologic time scale, geologic time periods. Their ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu]
	Ceratitida Ceratitida is an order that contains almost all ammonoid cephalopod genera from the Triassic as well as ancestral forms from the Upper Permian, the exception being the phylloceratids which gave rise to the great diversity of post-Triassic ammonites. Ceratitids overwhelmingly produced planospirally coiled discoidal shells that may be evolute with inner whorls exposed or involute with only the outer whorl showing. In a few later forms the shell became subglobular, in others, trochoidal or uncoiled. Sutures are typically ceratitic, with smooth saddles and serrate or digitized lobes. In a few the sutures are goniatitic while in others they are ammonitic. Taxonomy * Ceratitida Ceratitoidea Choristoceratoidea Clydonitoidea Danubitoidea Dinaritoidea Lobitoidea Meekoceratoidea Megaphyllitoidea Nathorstitoidea Noritoidea Otoceratoidea Pinacoceratoidea Ptychitoidea Sageceratoidea Tropitoidea Xenodiscoidea Only eight superfamilies ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu]
	Pinacoceratoidea Pinacoceratoidea, formerly Pinacocerataceae, are generally smooth, compressed, evolute to involute ammonoids from the Triassic, belonging to the Ceratitida, in which the suture is ammonitic, with adventitious and auxiliary elements. As presently conceived, the Pinacoceratoidea, named by Mojsisovics, 1879, combines six families; the: * Pinacoceratidae * Carnitidae Gymnitidae Isculitidae * Klamathitidae * Sagenitidae In ''Treatise on Invertebrate Paleontology'', Part L, the superfamily included only the Pinacoceratidae and Gymnitidae. Of the families more newly included in the Pinacocerataceae, the Carnitidae was removed from the Ceratitaceae and the Isculitidae from the Ptychitaceae. ''Klamathites'' was removed from the Carnitidae as type for the Klamathitidae. The Sagenitidae is based on the subfamily Sagenitinae of the tropitacean family Haloritidae The Haloritidae is a family of subglobular, involute, Triassic Ammonoidea, ammonoids belonging to the ceratitid superfamily Tr ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu]
	Dinaritoidea Dinaritoidea is an extinct superfamily of ammonoids in the order Ceratitida Ceratitida is an order that contains almost all ammonoid cephalopod genera from the Triassic as well as ancestral forms from the Upper Permian, the exception being the phylloceratids which gave rise to the great diversity of post-Triassic ammon .... References External links * * Ceratitida superfamilies {{Ceratitida-stub ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu]
	Otoceratoidea Otoceratoidea, formerly Otocerataceae, is an extinct superfamily of ammonite cephalopod A cephalopod is any member of the molluscan Taxonomic rank, class Cephalopoda (Greek language, Greek plural , ; "head-feet") such as a squid, octopus, cuttlefish, or nautilus. These exclusively marine animals are characterized by bilateral symm ...s in the order Ceratitida. References The Paleobiology DatabaseAccessed on 9/24/07 Otoceratina Ceratitida superfamilies {{Ceratitida-stub ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu]
	Noritoidea Noritoidea, formerly Noritaceae, is an extinct superfamily of cephalopods belonging to the Ammonite order Ceratitida. Noritoidea, defined by Karpinsky in 1889, combines ceratitids with "typically smooth, more or less discoidal shells with rounded or truncate peripheries and ceratitic sutures,...." Keeled or ribbed offshoots may have simpler or more complex sutures. Taxonomy Noritoidea as revised (Tozer 1981) is composed of the Noritidae, Inyoitidae, Lanceolitidae, Ophiceratidae, Stephanitidae, Ussuriidae Noritidae is the type family of the Noritoidea and may have been derived from the Dieneroceratidae through the Xenoceltitidae. The Inyoitidae is based on the Inyoitinae, which was removed from the Xenoceltitidae and elevated in rank. The Lanceolitidae, containing '' Lanceolites'' as the sole representative, was included in the Hedenstroemiidae as the Lanceolitinae. The Ophiceratidae and the Stephanoceratidae were removed from the Otocerataceae and the Ceratitacea ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu]
	Tropitoidea Tropitoidea, formerly Tropitaceae, is an extinct superfamily of ammonite cephalopods in the order Ceratitida, containing the following families: * Didymitidae * Episculitidae * Haloritidae * Juvavitidae * Parathisbitidae * Thisbitidae * Tropiceltidae * Tropiceltitidae Tropitidae The Tropitidae is a family of Upper Triassic Ammonoidea belonging to the Tropitoidea, a superfamily of the Ceratitida Tropitidae have subspherical to discoidal, involute to evolute shells with long body chambers and a ventral keel bordered by fur ... References The Paleobiology DatabaseAccessed on 1/14/12 Ceratitida superfamilies {{Ceratitida-stub ... [...More Info...] [...Related Items...] OR:* [Wikipedia] [Google] [Baidu]
	Xenodiscoidea Xenodiscoidea, formerly Xenodiscaceae, is a superfamily within the ammonoid order Ceratitida. The superfamily was named by Frech in 1902, presently contains ten families, only one of which was included in the original Otocerataceae of Hyatt, 1900, the remaining having been added. The Xenodiscoidea has its origins in the Middle Permian in the prolecanitid Daraelitidae through the ancestral Xenodiscidae. According to Kummel (1952) and Arkell et al. (1957) the Xenodiscidae gave rise to the Otoceratidae Otoceratidae is an extinct family of cephalopods belonging to the Ammonite subclass in the order Ceratitida Ceratitida is an order that contains almost all ammonoid cephalopod genera from the Triassic as well as ancestral forms from the Upper ... and Ophiceratidae. The Ophiceratidae in turn gave rise to the Dieneroceratidae which is considered the source for all remaining ceratitid stocks. All four families made up the original Otocerataceae The Xenodiscidae is removed from ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu]
	Clydonitoidea Clydonitoidea, formerly Clydonitaceae, is a superfamily in the ammonoid cephalopod order Ceratitida characterized by generally costate and tuberculate shells with smooth, grooved, or keeled venters and sutures that are commonly ceratitic or ammonitic but goniatitic in a few offshoots. Taxonomy Clydonitoidea unites 14 families (Arkell et al. 1962) (12 in Kummel 1952) derived from two ancestral stocks within, the Arpaditidae and the Trachyceratidae, which are derived from the Ceratitaceae. The Trachycerataceae, Haug 1894, used by Kummel, 1952 and more recently by Tozer, was originally equivalent to the Clydonitaceae, Mojsisovics 1879, of the Treatise, Part L; Kummel perhaps because the Trachyceratidae is one of two ancestral families while the Clydonitidae comprise a derived group. Tozer separated Trachycerataceae from Clydonitoidea, rearranging both, leaving Clydonitoidea with the original Clydonitidae, Clionititidae, and Metasibiritidae to which are added the Sandlingitidae a ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu]
	Ptychitoidea Ptychitoidea, formerly Ptychitacheae, is a superfamily of typically involute, subglobular to discoidal Ceratitida in which the shell is smooth with lateral folds or striations, inner whorls are globose, and the suture is commonly ammonitic. Their range is Middle_ and Upper Triassic. In its present configuration the Ptychitoidea includes three families, the: * Ptychitidae * Eosagenitidae * Sturiidae This differs from the taxonomy in the ''Treatise on Invertebrate Paleontology The ''Treatise on Invertebrate Paleontology,'' published from 1953–2007 by the Geological Society of America and the University of Kansas, then 2009–present by the University of Kansas Paleontological Institute, is a definitive multi-authore ...'', Part L, in which the Ptychitoidea included the Ptychitidae Isculitidae * Nannititdae The Isculitidae have since been removed to the Pinacocerataceae and the Nannitidae to the Danubitaceae. Fossils of Ptychitoidea have been found in the Triassic of C ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu]
	Choristoceratoidea Choristoceratoidea, formerly Choristocerataceae, is a superfamily of Late Triassic ceratitid ammonite Ammonoids are extinct, (typically) coiled-shelled cephalopods comprising the subclass Ammonoidea. They are more closely related to living octopuses, squid, and cuttlefish (which comprise the clade Coleoidea) than they are to nautiluses (family N ...s. They can be characterized by their simple, four-lobed suture lines and unusual heteromorph shell shapes, which can resemble straight rods or twisting cones rather than the flat coils typical of other ammonites. The shells are usually small (less than 3 cm long) and ornamented with prominent ribbing. References Ceratitida superfamilies Late Triassic first appearances Late Triassic extinctions {{Ceratitida-stub ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu]