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Earlier, ichthyosaurs were commonly divided into "longipinnate" and "latipinnate" forms, according to the long or wide shape of the front flippers, but recent research has shown that these are not natural groups; ichthyosaur clades often contain species with and without elongated forelimbs. [72] The ichthyosaur pelvis is typically rather reduced.
They were the largest ichthyosaurs, with even some of the smaller species like Guanlingsaurus measuring over 8 metres (26 ft) in length. [7] One of the largest specimens was discovered in England in May 2016, [ 8 ] when researcher and fossil collector Paul de la Salle discovered a partial jawbone measuring 96 centimeters (3.15 ft) long which ...
One of the largest ichthyosaurs, adults ranged in length from 6 m (20 ft) up to 10 m (33 ft) long. It was one of the least fish-like of the ichthyosaurs, lacking a dorsal fin and fluked tail. Consequently, Cymbospondylus probably swam by wriggling its body from side to side like a modern sea snake. Dearcmhara [19] Brusatte et al. 2015
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Cast of the first known complete Ichthyosaurus specimen (originally referred to as Proteosaurus), which was destroyed during WW2. Ichthyosaurus was the first complete fossil to be discovered in the early 19th century by Mary Anning in England; [9] the holotype of I. communis, no coll. number given, [10] was a fairly complete specimen discovered by Mary and Joseph Anning around 1814 in Lyme ...
Other ichthyosauriforms were the Ichthyopterygia, containing the Ichthyosauria and allies. The last ichthyosaurs probably became extinct in the middle Cretaceous . Their relationships with other reptiles are unresolved, due to their highly derived morphology and presumed ancient origins, even in their earliest known representatives, [ 3 ...
The ichthyosaurs, described as highly specialized aquatic reptiles, were distant relatives of lizards. They had an elongated snout, with four fins (two front and two rear) and a dorsal fin.
Ophthalmosaurus (Greek ὀφθάλμος ophthalmos 'eye' and σαῦρος sauros 'lizard') is a genus of ichthyosaur known from the Middle-Late Jurassic. Possible remains from the earliest Cretaceous, around 145 million years ago, are also known. It was a relatively medium-sized ichthyosaur, measuring 4 m (13 ft) long and weighing 940 kg ...