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While the earliest known sharks are cladodont, there is some evidence that they evolved from a common ancestor with "diplodonts", sharks whose teeth have two larger blades poking out, plus a small middle tine that could have become the main blade in cladodont teeth.
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were thought to be living descendants of cladodonts, but they are now believed to simply be unrelated, curiously shaped sharks, despite similarly pointy, snagging teeth.
259:"New chondrichthyans characterised by cladodont-like tooth morphologies from the Early Cretaceous of Austria, with remarks on the microstructural diversity of enameloid"
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shark known primarily for its "multi-cusped" tooth consisting of one long blade surrounded by many short, fork-like
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also begins to appear in the fossil record. Also a cladodont, it survived from the late
Devonian to the early
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Feichtinger, Iris; Engelbrecht, Andrea; Lukeneder, Alexander; Kriwet, Jürgen (2020-07-02).
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period, based on cladodont teeth found in deep water deposits of Early
Cretaceous (
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Guinot, Guillaume; Adnet, Sylvain; Cavin, Lionel; Cappetta, Henri (2013-10-29).
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306:"Cretaceous stem chondrichthyans survived the end-Permian mass extinction"
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Some cladodonts appear to have been in existence as recently as the
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Physiology of
Elasmobranch Fishes: Structure and Interaction
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120:Learn how and when to remove this message
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23:This is a typical Cladodont tooth, of a
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102:adding citations to reliable sources
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16:Early Devonian shark tooth structure
212:Tooth retention in cladodont sharks
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188:) age in Austria and France.
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39:(from Latin cladus, meaning
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436:Early Devonian fish
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263:Historical Biology
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228:. ReefQuest
186:Valanginian
425:Categories
232:2006-09-09
199:References
182:Cretaceous
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340:2041-1723
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