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• Sea snake (bottom right) 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. [1]
Mosasaurs became extinct 66 million years ago, at the same time as the dinosaurs. A modern semi-aquatic lizard: the marine iguana. Modern squamates which have made their own adaptions to allow them to spend significant time in the ocean include marine iguanas and sea snakes. Sea snakes are extensively adapted to the marine environment, giving ...
Although they were reptiles and descended from egg-laying, oviparous, ancestors, viviparity is not as unexpected as it first appears. Air-breathing marine creatures must either come ashore to lay eggs , like turtles and some sea snakes , or else give birth to live young in surface waters, like whales and dolphins.
A = Anapsid, B = Synapsid, C = Diapsid. It was traditionally assumed that first reptiles were anapsids, having a solid skull with holes only for the nose, eyes, spinal cord, etc.; [10] the discoveries of synapsid-like openings in the skull roof of the skulls of several members of Parareptilia, including lanthanosuchoids, millerettids, bolosaurids, some nycteroleterids, some procolophonoids and ...
Disteira major (Olive-headed or greater sea snake) Disteira nigrocincta Disteira walli (Wall's sea snake) Enhydrina schistosa (Beaked sea snake, hook-nosed sea snake, common sea snake, Valakadyn sea snake) Enhydrina zweifeli (Sepik or Zweifel’s beaked seasnake) Hydrophis; Hydrophis belcheri (Faint-banded sea snake, Belcher's sea snake)
The fossil has been identified as a new silesaurid, an extinct group of reptiles. Paleontologists debate whether silesaurids were true dinosaurs or possibly a precursor to the creatures that once ...
The diapsid reptiles (a subgroup of the sauropsids) strongly diversified during the Triassic, giving rise to the turtles, pseudosuchians (crocodilian ancestors), dinosaurs, pterosaurs, and lepidosaurs, along with many other reptile groups on land and sea. Some of the new Triassic reptiles would not survive into the Jurassic, but others would ...
They can be found in elevations from sea level to 5,000 m (16,000 ft). They prefer warmer, tropical climates but are adaptable and can live in all but the most extreme environments. Lizards also exploit a number of habitats; most primarily live on the ground, but others may live in rocks, on trees, underground and even in water.