Tropitidae

	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 furrows. The surface may have ribs, nodes, or spines, or may be smooth. The Ammonitic suture, suture is generally ammonitic, but may be ceratitic to goniatitic. The derivation of the Tropitidae is uncertain but they seem to form a group along with the Tropiceltitidae and Haloritidae within the superfamily. Genera Tropididae genera included: ''Acanthotropites'' ''Anatropites'' ''Arctotropites'' ''Arietoceltites'' ''Discotropites'' ''Euisculites'' ''Gymnotropites'' ''Homerites'' ''Homeroceras'' ''Hoplotropites'' ''Indonesites'' ''Jovites'' ''Margaritropites'' ''Microtropites'' ''Paratropites'' ''Paulotropites'' ''Platotropites'' ''Pleurotropites'' ''Sibyllites'' ''Tritropidoceras'' ''Tropites'' References Arkell ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu]
	Anatropites ''Anatropites'' is a genus of ammonite in the ceratitid family Tropitidae with spines instead of nodes on the umbilical shoulder, at least in early whorls.Arkell et al. Mesozoic Ammonoidea. Treatise on Invertebrate Paleontology, Part L, Ammonoidea. 1957 Ceratitids are mostly Triassic ammonoid cephalopods 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 .... ''Anatropites'' comes from British Columbia in Canada, Oregon and California in the United States, and Indonesia. The shell is in general evolute, but deeply impressed along the inner, or dorsal, margin. The whorl section is broad with flanks converging on a gently arched venter that bears a median keel. References Tropitidae Ceratitida genera Triassic ammonites of North America Late Triassic life Fossil taxa describe ... [...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]
	Arietoceltites ''Arietoceltites'' is an extinct genus of cephalopod belonging to the 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 ... subclass. References Tropitidae Ceratitida genera {{Ceratitida-stub ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu]
picture info	Triassic The Triassic ( ; sometimes symbolized 🝈) is a geologic period and system which spans 50.5 million years from the end of the Permian Period 251.902 million years ago ( Mya), to the beginning of the Jurassic Period 201.4 Mya. The Triassic is the first and shortest period of the Mesozoic Era and the seventh period of the Phanerozoic Eon. Both the start and end of the period are marked by major extinction events. The Triassic Period is subdivided into three epochs: Early Triassic, Middle Triassic and Late Triassic. The Triassic began in the wake of the Permian–Triassic extinction event, which left the Earth's biosphere impoverished; it was well into the middle of the Triassic before life recovered its former diversity. Three categories of organisms can be distinguished in the Triassic record: survivors from the extinction event, new groups that flourished briefly, and other new groups that went on to dominate the Mesozoic Era. Reptiles, especially archosaurs, were the ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu]