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 are sho ... [...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 tuberculate shells with ceratitic 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 to the Anisia ... [...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 are sho ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu]
picture info	Ammonoidea 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) than they are to shelled nautiloids such as the living ''Nautilus'' species. The earliest ammonites appeared during the Devonian, with the last species vanishing during the Cretaceous–Paleogene extinction event. Ammonites are excellent index fossils, and linking the rock layer in which a particular species or genus is found to specific geologic time periods is often possible. Their fossil shells usually take the form of planispirals, although some helically spiraled and nonspiraled forms (known as heteromorphs) have been found. The name "ammonite", from which the scientific term is derived, was inspired by the spiral shape of their fossilized shells, which somewhat resemble tightly coiled rams' horns. Pliny the Elder ( 79 AD nea ... [...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'', 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 The Danubitoidea is a large and diverse superfamily in the order Ceratitida of the Ammonoidea that combines five families removed from the Ceratitaceae, Clydonitaceae, and Ptychitaceae Ptychitoidea, formerly Ptychitacheae, is a superfamily of .... Fossils of Ptychitoidea have been found in the Triassic of Cal ... [...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 ammonoids belonging to the ceratitid superfamily Tropitoidea. ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu]
	Otoceratoidea Otoceratoidea, formerly Otocerataceae, is an extinct superfamily of ammonite cephalopods 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 ammoni .... 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 Ceratitaceae ... [...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 and Ophiceratidae The Ophiceratidae is a family in the ammonoid order Ceratitida from the Lower Triassic, previously included in the Otocerataceae but now placed in the Noritiaceae as revised. The Ophiceratidae produced sepenticones with compressed elliptical who .... 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 t ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu]
	Choristoceratoidea Choristoceratoidea, formerly Choristocerataceae, is a superfamily of Late Triassic ceratitidan ammonites 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) .... 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]
	Clydonitoidea Clydonitoidea, formerly Clydonitaceae, is a superfamily in the ammonoid cephalopod order Ceratitida characterized by generally costate and turberculate shells with smooth, grooved, or keeled venters and sutures that are commonly ceratitic or ammonitic but goniatic 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 and ... [...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 The Haloritidae is a family of subglobular, involute, Triassic ammonoids belonging to the ceratitid superfamily Tropitoidea. Their shells may be smooth or may have ribs that cross or are interrupted on the venter, and may have nodes. Keels and ve ... Juvavitidae * Parathisbitidae * Thisbitidae * Tropiceltidae * Tropiceltitidae * Tropitidae References The Paleobiology DatabaseAccessed on 1/14/12 Ceratitida superfamilies {{Ceratitida-stub ... [...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 ammoni .... References External links * * Ceratitida superfamilies {{Ceratitida-stub ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu]