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Porolepiformes
Porolepiformes is an order of prehistoric lobe-finned fish which lived during the Devonian period (about 416 to 359 million years ago). The group contains two families: Holoptychiidae and Porolepididae. Porolepiformes was established by the Swedish paleontologist Erik Jarvik, and were thought to have given rise to the salamanders and caecilians independently of the other tetrapods. He based this conclusion on the shapes of the snouts of the aforementioned groups. This view is no longer in favour in Paleontology. Jarvik also claimed the existence of choanae The choanae (singular choana), posterior nasal apertures or internal nostrils are two openings found at the back of the nasal passage between the nasal cavity and the throat in tetrapods, including humans and other mammals (as well as crocodilia ... in porolepiformes which linked them to tetrapods, but this has remained controversial. Recent phylogenetic reconstruction places porolepiformes close to lungfishes. More r ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Porolepis Spitsbergensis
''Porolepis'' is an extinct genus of porolepiform sarcopterygian fish, from the Early Devonian Dniester Series of Ukraine, which is rich in ''Porolepis'' remains, and also the Nellen Koepfchen Beds of Germany. It lived alongside the dubious lophotrochozoan ''Macrodontophion''. It was first described in 1858 but ''Porolepis'' was not named as a sufficient species until 1891. A. S. Woodward. (1891) Catalogue of the Fossil Fishes in the British Museum (Natural History). Part II. ''Catalogue of the Fossil Fishes in the British Museum (Natural History)'' 2 See also * Sarcopterygii * List of sarcopterygians * List of prehistoric bony fish A ''list'' is any set of items in a row. List or lists may also refer to: People * List (surname) Organizations * List College Albert A. List College of Jewish Studies, known simply as List College, is the undergraduate school of the J ... References Prehistoric lobe-finned fish genera Fossil taxa described in 1891 {{pale ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Porolepis Posnaniensis
''Porolepis'' is an extinct genus of porolepiform sarcopterygian fish, from the Early Devonian Dniester Series of Ukraine, which is rich in ''Porolepis'' remains, and also the Nellen Koepfchen Beds of Germany. It lived alongside the dubious lophotrochozoan ''Macrodontophion''. It was first described in 1858 but ''Porolepis'' was not named as a sufficient species until 1891. A. S. Woodward. (1891) Catalogue of the Fossil Fishes in the British Museum (Natural History). Part II. ''Catalogue of the Fossil Fishes in the British Museum (Natural History)'' 2 See also * Sarcopterygii * List of sarcopterygians * List of prehistoric bony fish A ''list'' is any set of items in a row. List or lists may also refer to: People * List (surname) Organizations * List College Albert A. List College of Jewish Studies, known simply as List College, is the undergraduate school of the J ... References Prehistoric lobe-finned fish genera Fossil taxa described in 1891 {{pale ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Holoptychius Quebecensis -"salamanderfisk"
''Holoptychius'' (from el, όλος , 'whole' and el, πτυχή 'fold') is an extinct genus of porolepiform lobe-finned fish from the Middle Devonian to Carboniferous ( Mississippian) periods. It is known from fossils worldwide. The genus was first described by Louis Agassiz in 1839. Description ''Holoptychius'' was a streamlined predator about long (though largest specimen could grew up to ), which fed on other bony fish. Its rounded scales and body form indicate that it could have swum quickly through the water to catch prey. Similar to other rhipidistians, it had fang-like teeth on its palate in addition to smaller teeth on the jaws. Its asymmetrical tail sported a caudal fin on its lower end. To compensate for the downward push caused by this fin placement, the pectoral fins of ''Holoptychius'' were placed high on the body. Species Of the genus ''Holoptychius'' the following species have been described: * ''H. americanus'' * ''H. andersoni'' * ''H. bergmanni'' (Down ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Porolepis Brevis
''Porolepis'' is an extinct genus of porolepiform sarcopterygian fish, from the Early Devonian Dniester Series of Ukraine, which is rich in ''Porolepis'' remains, and also the Nellen Koepfchen Beds of Germany. It lived alongside the dubious lophotrochozoan ''Macrodontophion''. It was first described in 1858 but ''Porolepis'' was not named as a sufficient species until 1891. A. S. Woodward. (1891) Catalogue of the Fossil Fishes in the British Museum (Natural History). Part II. ''Catalogue of the Fossil Fishes in the British Museum (Natural History)'' 2 See also * Sarcopterygii * List of sarcopterygians * List of prehistoric bony fish A ''list'' is any set of items in a row. List or lists may also refer to: People * List (surname) Organizations * List College Albert A. List College of Jewish Studies, known simply as List College, is the undergraduate school of the J ... References Prehistoric lobe-finned fish genera Fossil taxa described in 1891 {{pale ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Porolepis Elongata
''Porolepis'' is an extinct genus of porolepiform sarcopterygian fish, from the Early Devonian Dniester Series of Ukraine, which is rich in ''Porolepis'' remains, and also the Nellen Koepfchen Beds of Germany. It lived alongside the dubious lophotrochozoan ''Macrodontophion''. It was first described in 1858 but ''Porolepis'' was not named as a sufficient species until 1891. A. S. Woodward. (1891) Catalogue of the Fossil Fishes in the British Museum (Natural History). Part II. ''Catalogue of the Fossil Fishes in the British Museum (Natural History)'' 2 See also * Sarcopterygii * List of sarcopterygians * List of prehistoric bony fish A ''list'' is any set of items in a row. List or lists may also refer to: People * List (surname) Organizations * List College Albert A. List College of Jewish Studies, known simply as List College, is the undergraduate school of the J ... References Prehistoric lobe-finned fish genera Fossil taxa described in 1891 {{pale ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Holoptychius
''Holoptychius'' (from el, όλος , 'whole' and el, πτυχή 'fold') is an extinction, extinct genus of porolepiform lobe-finned fish from the Middle Devonian to Carboniferous (Mississippian (geology), Mississippian) periods. It is known from fossils worldwide. The genus was first described by Louis Agassiz in 1839. Description ''Holoptychius'' was a streamlined predator about long (though largest specimen could grew up to ), which fed on other bony fish. Its rounded scales and body form indicate that it could have swum quickly through the water to catch prey. Similar to other rhipidistians, it had fang-like teeth on its palate in addition to smaller teeth on the jaws. Its asymmetrical tail sported a caudal fin on its lower end. To compensate for the downward push caused by this fin placement, the pectoral fins of ''Holoptychius'' were placed high on the body. Species Of the genus ''Holoptychius'' the following species have been described: * ''H. americanus'' * ''H. ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Laccognathus
''Laccognathus'' is an extinct genus of amphibious lobe-finned fish from Europe and North America. They existed from the Middle Devonian to the Late Devonian (around 397.5 to 360 mya). The name comes from Greek for 'pitted jaw'. Description Species of ''Laccognathus'' were characterized by the presence of three large pits (fossae) on the external surface of the lower jaw which may have had sensory functions. It is the origin of the genus name, from Greek λάκκος ('pit') and γνάθος ('jaw'). ''Laccognathus'' grew to approximately in length. They had very short dorsoventrally flattened heads, less than one-fifth the length of the body. Like other sarcopterygians, their fins arise from pairs of fleshy lobes. The skeleton of ''Laccognathus'' was structured such that large areas of the skin were stretched out over solid plates of bone. This bone was composed of particularly dense fibers—so dense that cutaneous respiration (exchange of oxygen through the skin) was not a ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Porolepis Siegenensis
''Porolepis'' is an extinct genus of porolepiform sarcopterygian fish, from the Early Devonian Dniester Series of Ukraine, which is rich in ''Porolepis'' remains, and also the Nellen Koepfchen Beds of Germany. It lived alongside the dubious lophotrochozoan ''Macrodontophion''. It was first described in 1858 but ''Porolepis'' was not named as a sufficient species until 1891. A. S. Woodward. (1891) Catalogue of the Fossil Fishes in the British Museum (Natural History). Part II. ''Catalogue of the Fossil Fishes in the British Museum (Natural History)'' 2 See also * Sarcopterygii * List of sarcopterygians * List of prehistoric bony fish A ''list'' is any set of items in a row. List or lists may also refer to: People * List (surname) Organizations * List College Albert A. List College of Jewish Studies, known simply as List College, is the undergraduate school of the J ... References Prehistoric lobe-finned fish genera Fossil taxa described in 1891 {{pale ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Porolepis
''Porolepis'' is an extinct genus of porolepiform sarcopterygian fish, from the Early Devonian Dniester Series of Ukraine, which is rich in ''Porolepis'' remains, and also the Nellen Koepfchen Beds of Germany. It lived alongside the dubious lophotrochozoan ''Macrodontophion''. It was first described in 1858 but ''Porolepis'' was not named as a sufficient species until 1891. A. S. Woodward. (1891) Catalogue of the Fossil Fishes in the British Museum (Natural History). Part II. ''Catalogue of the Fossil Fishes in the British Museum (Natural History)'' 2 See also * Sarcopterygii * List of sarcopterygians * List of prehistoric bony fish A ''list'' is any set of items in a row. List or lists may also refer to: People * List (surname) Organizations * List College Albert A. List College of Jewish Studies, known simply as List College, is the undergraduate school of the J ... References Prehistoric lobe-finned fish genera Fossil taxa described in 1891 {{pale ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Glyptolepis (fish)
''Glyptolepis'' is an extinct genus of porolepiform lobe-finned fish which lived during Devonian Period, from the early Eifelian to Frasnian Age Age or AGE may refer to: Time and its effects * Age, the amount of time someone or something has been alive or has existed ** East Asian age reckoning, an Asian system of marking age starting at 1 * Ageing or aging, the process of becoming older .... References Porolepiformes Prehistoric lobe-finned fish genera Devonian bony fish Fossil taxa described in 1841 Fossils of Russia {{paleo-lobefinned-fish-stub ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Duffichthys
''Duffichthys'' is a genus of prehistoric lobe-finned fish which lived during the Late Devonian period. Fossils have been found at the locality of Scat Craig, Scotland.Ahlberg, P. E., 1992: ''A new holoptychiid porolepiform fish from the Upper Frasnian of Elgin, Scotland''. ''Palaeontology Paleontology (), also spelled palaeontology or palæontology, is the scientific study of life that existed prior to, and sometimes including, the start of the Holocene epoch (roughly 11,700 years before present). It includes the study of fossi ...'', 35. 813-828. References Porolepiformes Prehistoric lobe-finned fish genera Devonian bony fish Late Devonian animals Late Devonian fish Fossils of Great Britain {{paleo-lobefinned-fish-stub ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Lobe-finned Fish
Sarcopterygii (; ) — sometimes considered synonymous with Crossopterygii () — is a taxon (traditionally a class or subclass) of the bony fishes known as the lobe-finned fishes. The group Tetrapoda, a mostly terrestrial superclass including amphibians, sauropsids (reptiles, including dinosaurs and therefore birds) and synapsids (with mammals being the only extant group), evolved from certain sarcopterygians; under a cladistic view, tetrapods are themselves considered a subgroup within Sarcopterygii. The known extant non-tetrapod sarcopterygians include two species of coelacanths and six species of lungfishes. Characteristics Early lobe-finned fishes are bony fish with fleshy, lobed, paired fins, which are joined to the body by a single bone. The fins of lobe-finned fishes differ from those of all other fish in that each is borne on a fleshy, lobelike, scaly stalk extending from the body. The scales of sarcopterygians are true scaloids, consisting of lamellar bone surro ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
