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Hungaritidae
The Hungaritidae comprises a family of ceratitid ammonites described in the Treatise,(Arkell et al. 1957), as involute compressed, discoidal, with keeled or sharpened venter, smooth to weakly costate. Sutures ceratitid, usually with numerous elements. Hungaritids are Middle Triassic in age spanning a range from about 247 Ma to 235 Ma. By current assessment six genera are included. :'' Hungarites'', type genus :'' Gevanites'' :'' Iberites'' :'' Negebites'' :'' Paraceratitoides'' :'' Perrinoceras'' Arkell, et al. 1957, in Part L of the original treatise lists instead: ''Hungarites'', ''Noetlingites'', ''Longobardites'', ''Neodalmanites'', ''Groenlandites'', ''Perrinoceras'', ''Arctohungarites'', ''Dalmanites'', and ''Prohungarites''. Only two have remained, Hungarites and Perrinoceras. ''Longobardites'' has been removed as type genus for the Longobarditidae Longobarditidae is a family of ceratitd ammonoids known from the early Triassic, included in the Danubitaceae The ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Longobarditidae
Longobarditidae is a family of ceratitd ammonoids known from the early Triassic, included in 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. Taxonomy Superfamily Danubitoidea * Family Aplococeratidae .... Longobarditidae includes genera formerly placed in Hungaritidae by the American Treatise on Invertebrate Paleontology, Part L, 1957 as well as genera that have been described since. Taxonomy Longobarditidae includes 17 genera, 16 distributed among 4 subfamilies plus one unassigned. Six genera were named prior to the first publication of part L of the Treatise on Invertebrate Paleontology in 1957, the remaining 11 since. ''Arctohungerites'', ''Groenlandites'', ''Longobardites'', and ''Noetingites'' were previously included in the Hungeritidae, ''Czekanowskites'' in the Meekoceritidae, and ''Pearylandites'' in the Sibe ... [...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 arch ... [...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 Permian ( ) is a geologic period and stratigraphic system which spans 47 million years from the end of the Carboniferous Period million years ago (Mya), to the beginning of the Triassic Period 251.9 Mya. It is the last period of the Pale ..., 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 ** Clydonitoide ... [...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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