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Please note that the content of this book primarily consists of articles available from Wikipedia or other free sources online. Dolichosaurus is an extinct genus of marine squamate of the Upper Cretaceous Cenomanian chalk deposits of England. Sister-group relationships between coniasaurs, dolichosaurs, Aigialosauridae and Mosasauridae are an unresolved polytomy. The paleobiology of Dolichosaurus is reconstructed as similar to coniasaurs, nothosaurs, and modern sea snakes. Squamata, or the scaled reptiles, is the largest recent order of reptiles, including lizards and snakes. Members of the order are distinguished by their skins, which bear horny scales or shields. They also possess movable quadrate bones, making it possible to move the upper jaw relative to the braincase. This is particularly visible in snakes, which are able to open their mouths very wide to accommodate comparatively large prey. They are the most variably-sized order of reptiles, ranging from the 16-millimetre (0.63 in) Jaragua Sphaero (Sphaerodactylus ariasae) to the 8-metre (26 ft) Green Anaconda (Eunectes murinus) and the now-extinct mosasaurs, which reached lengths of 14 metres (46 ft).

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