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Extinct order of fishes From Wikipedia, the free encyclopedia
Porolepiformes is an order of prehistoric lobe-finned fish which lived during the Devonian period (about 416 to 359 million years ago). They are thought to represent the sister group to lungfish (class Dipnoi).[1] The group contains two families: Holoptychiidae and Porolepididae.
Porolepiformes Temporal range: Devonian and Carboniferous | |
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Various genera | |
Scientific classification | |
Domain: | Eukaryota |
Kingdom: | Animalia |
Phylum: | Chordata |
Clade: | Sarcopterygii |
Clade: | Rhipidistia |
Clade: | Dipnomorpha |
Class: | †Porolepimorpha |
Order: | †Porolepiformes Jarvik 1942 |
Genera | |
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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.[2] He based this conclusion on the shapes of the snouts of the aforementioned groups. This view is no longer in favour in Paleontology.[3]
Jarvik also claimed the existence of choanae in porolepiformes which linked them to tetrapods, but this has remained controversial.[4] Recent phylogenetic reconstruction places porolepiformes close to lungfishes.[5]
More recent evidence has shown that at least one genus Laccognathus was most likely amphibious.[6]
Mikko's Phylogeny Archive [7]
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