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Dicellopyge
''Dicellopyge'' is an extinct genus of freshwater ray-finned fish from the Triassic of South Africa. It is characterized by characteristics such as a short, blunt snout and a deeply cleft tail. Two species are known, ''D. macrodentata'' and ''D. lissocephalus'', which were contemporaries and differed in scale and tail morphology. It was initially classified in its own family, the Dicellopygidae, but has subsequently been referred to the Palaeoniscidae as a close relative of ''Acrolepis'', ''Cornuboniscus'', '' Belichthys'', and the Amblypteridae. It coexisted with fish such as ''Lissodus'', ''Elonichthys'', ''Ceratodus'', '' Coelacanthus'', ''Helichthys ''Helichthys'' is an extinct genus of prehistoric bony fish that lived during the Early Triassic epoch (geology), epoch in what is now South Africa. Although several species of ''Helichthys'' have been erected (''H. elegans'', ''H. stegopyge'', ...'', '' Meidiichthys'', and '' Atopocephale''. References Prehistoric fish ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Palaeoniscidae
Palaeoniscidae is an extinct family of ray-finned fishes (Actinopterygii) ascribed to the order Palaeonisciformes. The family includes the genus '' Palaeoniscum'' and potentially other Palaeozoic and Mesozoic early actinopterygian genera. The name is derived from the Ancient Greek words παλαιός (''palaiós'', ancient) and ὀνίσκος (''oniskos'', 'cod-fish' or woodlouse). Historic background The family was first named "Palaeoniscini" by Charles Lucien Bonaparte in 1846, and "Palaeonisciden" by Carl Vogt in 1851. Later, the family name was standardized to Palaeoniscidae. The authorship of the family Palaeoniscidae is variably attributed to either Bonaparte or Vogt in the literature. Vogt ascribed the following genera to Palaeoniscidae: ''Palaeoniscum'', '' Platysomus'' (misspelled as ''Platysemius''), '' Amblypterus'', '' Eurynotus'', '' Pygopterus'', and '' Acrolepis''. With the exception of ''Palaeoniscum'', these genera were later placed in separate families ( ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Helichthys
''Helichthys'' is an extinct genus of prehistoric bony fish that lived during the Early Triassic epoch (geology), epoch in what is now South Africa. Although several species of ''Helichthys'' have been erected (''H. elegans'', ''H. stegopyge'', ''H. obesus'', ''H. ctenipteryx'', ''H. grandipennis''), they were later all synonymized with the type species, ''H. browni''. Fossils were recovered from the Cynognathus Assemblage Zone, Lower ''Cynognathus'' Assemblage Zone of Bekker's Kraal. Synonyms *''Helichthys draperi'' (Arthur Smith Woodward, Woodward, 1893) → ''Dicellopyge draperi'' (Woodward, 1893) *''Helichthys tenuis'' Broom, 1909 → ''Dicellopyge tenuis'' (Broom, 1909) See also * Prehistoric fish * List of prehistoric bony fish References Redfieldiiformes Early Triassic fish Triassic South Africa Fossils of South Africa {{Paleo-rayfinned-fish-stub ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Anisian
In the geologic timescale, the Anisian is the lower stage or earliest age of the Middle Triassic series or epoch and lasted from million years ago until million years ago. The Anisian Age succeeds the Olenekian Age (part of the Lower Triassic Epoch) and precedes the Ladinian Age. Stratigraphic definitions The stage and its name were established by Austrian geologists Wilhelm Heinrich Waagen and Carl Diener in 1895. The name comes from ''Anisus'', the Latin name of the river Enns. The original type locality is at Großreifling in the Austrian state of Styria. The base of the Anisian Stage (also the base of the Middle Triassic series) is sometimes laid at the first appearance of conodont species '' Chiosella timorensis'' in the stratigraphic record. Other stratigraphers prefer to use the base of magnetic chronozone MT1n. There is no accepted global reference profile for the base, but one ( GSSP or golden spike) was proposed at a flank of the mountain Deşli Caira in the Roman ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Ceratodus
''Ceratodus'' (from el, κέρας , 'horn' and el, ὀδούς 'tooth') was a wide-ranging genus of extinct lungfish. Fossil evidence dates back to the Early Triassic. A wide range of fossil species from different time periods have been found around the world in places such as the United States, Argentina, Greenland, England, Germany, Egypt, Madagascar, China, and Australia.Agnolin, F. L., Mateus O., Milàn J., Marzola M., Wings O., Adolfssen J. S., & Clemmensen L. B. (2018). Ceratodus tunuensis, sp. nov., a new lungfish (Sarcopterygii, Dipnoi) from the Upper Triassic of central East Greenland. Journal of Vertebrate Paleontology. e1439834 ''Ceratodus'' is believed to have become extinct sometime around the beginning of the Eocene Epoch. The closest living relative of ''Ceratodus'' is thought to be the Queensland lungfish, ''Neoceratodus forsteri'', which means "new ''Ceratodus''" in Greek. Species * ''C. latissimus'' Agassiz, 1837 ( type) * ''C. eruciferus'' Cope, 1876 (''nom ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Triassic Fish Of Africa
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] |
