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Marine reptiles are reptiles which have become secondarily adapted for an aquatic or semiaquatic life in a marine environment. Only about 100 of the 12,000 extant reptile species and subspecies are classed as marine reptiles, including marine iguanas , sea snakes , sea turtles and saltwater crocodiles .
A study in 2009, which examined 94 living species of reptiles, birds and mammals, found that the genetic control of sex appears to be crucial to live birth. It was concluded that with marine reptiles such control predated viviparity and was an adaptation to the stable sea-climate in coastal regions. [ 147 ]
Restoration of Mosasaurus hoffmannii, an extinct marine lizard. Squamata is the largest order of reptiles, comprising lizards, snakes, and amphisbaenians (worm lizards). There are many examples of aquatic squamates, both living and extinct; a secondarily aquatic lifestyle has evolved multiple times.
The evolution of tetrapods began about 400 million years ago in the Devonian Period with the earliest tetrapods evolved from lobe-finned fishes. [1] Tetrapods (under the apomorphy-based definition used on this page) are categorized as animals in the biological superclass Tetrapoda, which includes all living and extinct amphibians, reptiles, birds, and mammals.
Grayia smythii (Smith's African water snake) Homalopsidae (Bockadams) [1] Bitia hydroides (Keel-bellied water snake) Cantoria violacea (Cantor's water snake) Cerberus (Dog-faced water snakes) Cerberus australis Cerberus dunsoni Cerberus microlepis Cerberus rynchops Cerberus schneiderii. Djokoiskandarus annulata (Banded water snake) Myrrophis
A new type of Archaeopteryx fossil helps build the case for this creature being called 'the first bird'. How we discovered a new species of the 'missing link' between dinosaurs and birds Skip to ...
Reptiles, from Nouveau Larousse Illustré, 1897–1904, notice the inclusion of amphibians (below the crocodiles). In the 13th century, the category of reptile was recognized in Europe as consisting of a miscellany of egg-laying creatures, including "snakes, various fantastic monsters, lizards, assorted amphibians, and worms", as recorded by Beauvais in his Mirror of Nature. [7]
SAO JOAO DO POLESINE, Brazil (Reuters) -Scientists in Brazil announced the discovery of one of the world's oldest fossils believed to belong to an ancient reptile dating back some 237 million ...