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Ptychodus was a large shark, previously estimated at 10 meters (33 feet) long based on extrapolation from teeth. [ 13 ] [ 14 ] The subadult specimen with the largest vertebra showed that it could reach lengths of 4.3–7.07 m (14.1–23.2 ft), so a 10 m (33 ft) length is possible, but more analysis is required for verification.
As the name implies, they are a type of cladodont, primitive sharks with teeth designed to snag fish and swallow them whole, instead of sawing off chunks to swallow. Fossils of Cladodus have been found in Barkip, Scotland, [1] Bundock and Laurel Formations, Australia [2] and in the Pitkin Formation (Carboniferous period) in Arkansas, United States.
Galagadon (/ ɡ æ l ʌ ɡ ə d ɒ n /) is an extinct genus of small carpet shark that lived during the Late Cretaceous period. It contains one species, G. nordquistae. It was named after the video game Galaga due to a resemblance between its teeth and the spaceships in the game, [1] and Field Museum volunteer Karen Nordquist.
Hunting Island scavengers have found everything from the teeth of lemon sharks to those of megalodons ... an oyster shell that many people may think is a shark tooth on Thursday, March 14, 2024 at ...
This is a typical Cladodont tooth, of a shark called Glikmanius. Cladodont (from Latin cladus, meaning branch and Greek Odon, meaning tooth) is the term for a common category of early Devonian shark known primarily for its "multi-cusped" tooth consisting of one long blade surrounded by many short, fork-like tines, designed to catch food that was swallowed whole, instead of being used to saw ...
The first shark-like chondrichthyans appeared in the oceans 400 million years ago, [1] developing into the crown group of sharks by the Early Jurassic. [2] Listed below are extant species of shark. Sharks are spread across 512 described and 23 undescribed species in eight orders. The families and genera within the orders are listed in ...
The shark specimen is small with a brown and tan striped pattern and two fins on top, photos show. Its head has a square-like shape with a blunt nose. A researcher holds one specimen of the newly ...
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