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Ichthyosauria [a] is an order of large extinct marine reptiles sometimes referred to as "ichthyosaurs", although the term is also used for wider clades in which the order resides. Ichthyosaurians thrived during much of the Mesozoic era; based on fossil evidence, they first appeared around 250 million years ago ( Ma ) and at least one species ...
A primitive ichthyosaur that retained a lizard-like body discovered in Chaohu, China. It was also one of the smallest ichthyosaurs, being from 70 to 180 cm long and an estimated weight of 10 kg. Chensaurus [1] [9] Mazin Suteethorn Buffetaut Jaeger Helmcke-Ingavat. 1991. Jr. synonym. N/A N/A Junior synonym of Chaohusaurus. Chonespondylus [9 ...
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 ...
Shonisaurus is a genus of very large ichthyosaurs.At least 37 incomplete fossil specimens of the type species, Shonisaurus popularis, have been found in the Luning Formation of Nevada, USA.
Size comparison. At the time of its discovery, Cartorhynchus was the smallest-known member of the Ichthyosauriformes.The preserved specimen had a length of 21.4 centimetres (8 in); assuming that it had tail proportions comparable to close relatives, Motani and colleagues estimated a full body length of 40 centimetres (1 ft 4 in) and a weight of 2 kilograms (4.4 lb).
The largest extant turtle is the leatherback sea turtle (Dermochelys coriacea), reaching a maximum total length of 3 m (10 ft) and a weight of 961 kg (2,119 lb). [1] [96] The second-largest extant testudine is the Loggerhead sea turtle. It tends to weight slightly more average weight than the green sea turtle, and reaches more massive top sizes.
The Ichthyosauromorpha are an extinct clade of Mesozoic marine reptiles consisting of the Ichthyosauriformes and the Hupehsuchia.. The node clade Ichthyosauromorpha was first defined by Ryosuke Motani et al. in 2014 as the group consisting of the last common ancestor of Ichthyosaurus communis and Hupehsuchus nanchangensis, and all its descendants.
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.