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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 .
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) Hydrophis bituberculatus (Peters' sea snake) Hydrophis brooki
The earliest documented case of viviparity in reptiles is the Early Permian mesosaurs, [121] although some individuals or taxa in that clade may also have been oviparous because a putative isolated egg has also been found. Several groups of Mesozoic marine reptiles also exhibited viviparity, such as mosasaurs, ichthyosaurs, and Sauropterygia, a ...
As their habitats are mostly defined by ocean currents, [1] many species have a cosmopolitan distribution, with some like Oikopleura dioica being found in all of the world's oceans. [27] Larvaceans have been reported as far as the Southern Ocean , where they are estimated to comprise 10.5 million tonnes of wet biomass.
Currently, of the approximately 12,000 extant reptile species and sub-species, only about 100 of are classed as marine reptiles. [30] Except for some sea snakes, most extant marine reptiles are oviparous and need to return to land to lay their eggs. Apart from sea turtles, the species usually spend most of their lives on or near land rather ...
A fossil jawbone found by a British girl and her father on a beach in Somerset, England belongs to a gigantic marine reptile dating to 202 million years ago that appears to have been among the ...
A massive jawbone found by a father-daughter fossil-collecting duo on a beach in Somerset along the English coast belonged to a newfound species that’s likely the largest known marine reptile to ...
The last two to three pairs of ribs are not connected and hang freely in the body wall. The stable lumbar and tail include the other vertebrae. Below the caudal vertebrae is the chevron bone. The front limbs are paddle-shaped with shortened arms and elongated finger bones, to support movement. They are connected by cartilage.