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Keyserlingitinae
Keyserlingitinae is a subfamily of the Sibiritidae, Early Triassic Ammonoidea. Shells tend to have subquadrate whorl sections as in ''Durgaites'' and ''Kyserlingites'' and to be strongly ribbed or nodose or both. Genera The Keyserlingitinae includes *'' Kyserlingites'' *'' Durgaites'' *''Goricanites'' *''Olenekoceras ''Olenekoceras'' is an ammonoid cephalopod from the Lower Triassic included in the ceratitid family Sibiritidae, once included in the Noritaceae but now in the Ceratitaceae Ceratitoidea, formerly Ceratitaceae, is an ammonite superfamily in o ...'' *'' Pseudokeyserlingites'' *'' Subolenekites'' References * W.J. Arkell, et al., 1957. Mesozoic Ammonoidea; Treatise on Invertebrate Paleontology, Part L. Geological Society of America and University of Kansas Press. Keyserlingitinae Paleod Triassic ammonites Ceratitoidea {{ceratitida-stub ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Goricanites
''Goricanites'' is a ceratitid ammonoid cephalopod known only from the Lower Triassic Union Wash formation of California (USA). This fossil is included in the family Sibiritidae Sibiritidae constitutes a family of ceratitid ammonites described in the Treatise, Part L, 1957, as ribbed or teberculate derivatives of Meekoceritidae with modification of the venter from mere widening and transverse ribbing to sulcation (bein ... and subfamily Keyserlingitinae References''Goricanites'' Paleodb Triassic ammonites Ceratitida genera Ceratitoidea {{ceratitida-stub ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Sibiritidae
Sibiritidae constitutes a family of ceratitid ammonites described in the Treatise, Part L, 1957, as ribbed or teberculate derivatives of Meekoceritidae with modification of the venter from mere widening and transverse ribbing to sulcation (being grooved). The Sibiritidae have been removed from the Noritaceae where 8 genera were included to the Ceratitaceae 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 ' ... with some 14 genera within three defined subfamilies, as indicated. Keyserlingitinae :'' Goricanites'' :'' Olenekoceras'' :'' Pseudokeyserlingites'' :'' Subolenekites'' Olenikitinae :'' Kazakhstanites'' :'' Olenikites'' :'' Prohungarites'' :'' Pseudosvalbardiceras'' :'' Svalbardiceras'' :'' Timoceras'' :'' Tjururpites'' Silberlingitinae :'' Silberlingites'' ''Refere ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Olenekoceras
''Olenekoceras'' is an ammonoid cephalopod from the Lower Triassic included in the ceratitid family Sibiritidae, once included in the Noritaceae but now in the Ceratitaceae 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 ' .... Distribution Japan and the Russian Federation. References ;Notes ;Bibliography * W.J. Arkell, et al., 1957. Mesozoic Ammonoidea; Treatise on Invertebrate Paleontology, Part L. Geological Society of America and University of Kansas Press. Triassic ammonites Fossils of Russia Olenekian life Ceratitida genera Ceratitoidea {{ceratitida-stub ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Triassic
The Triassic ( ) is a geologic period and system which spans 50.6 million years from the end of the Permian Period 251.902 million years ago ( Mya), to the beginning of the Jurassic Period 201.36 Mya. The Triassic is the first and shortest period of the Mesozoic Era. 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 chief terrestrial vertebrates during this time. A specialized subgroup of archo ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
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] |
Triassic Ammonites
The Triassic ( ) is a geologic period and system which spans 50.6 million years from the end of the Permian Period 251.902 million years ago ( Mya), to the beginning of the Jurassic Period 201.36 Mya. The Triassic is the first and shortest period of the Mesozoic Era. 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 chief terrestrial vertebrates during this time. A specialized subgroup of archosaurs ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
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