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Fishes are a paraphyletic group and for this reason, the class Pisces seen in older reference works is no longer used in formal taxonomy.Traditional classification divides fish into three extant classes (Agnatha, Chondrichthyes, and Osteichthyes), and with extinct forms sometimes classified within those groups, sometimes as their own classes: [1]
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As of September 2016, the International Union for Conservation of Nature (IUCN) lists 65 extinct fish species, 87 possibly extinct fish species, and six extinct in the wild fish species. [ 1 ] [ 2 ] Cartilaginous fish
The property erf −z) = −erf z ... there is a unique real number denoted erf −1 x satisfying ... This allows one to choose the fastest approximation suitable for ...
Xiphactinus (from Latin and Greek for "sword-ray") is an extinct genus of large predatory marine ray-finned fish that lived during the late Albian to the late Maastrichtian. [4] The genus grew up to 5–6 metres (16–20 ft) in length, and superficially resembled a gargantuan, fanged tarpon .
Only three sedimentary beds bearing manta ray fossils are known, one from the Oligocene in South Carolina and two from the Miocene and Pliocene in North Carolina. [1] M. hynei is a fossil species dating to Early Pliocene North America. [18] Remains of an extinct species have been found in the Chandler Bridge Formation of South Carolina.
WikiProject Fishes aims to help organise our rapidly growing collection of articles about fish taxa.Issues outside the scope of this WikiProject include fishkeeping (fish aquarium topics), fishing, fisheries, fish cuisine topics, fish farm topics, fish market topics, fish processing topics, fish product sales topics, fish products topics, and fish trap topics.
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