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Marine reptile. 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]
The Plesiosauria[ a ][ 4 ] or plesiosaurs are an order or clade of extinct Mesozoic marine reptiles, belonging to the Sauropterygia. Plesiosaurs first appeared in the latest Triassic Period, possibly in the Rhaetian stage, about 203 million years ago. [ 5 ] They became especially common during the Jurassic Period, thriving until their ...
Fordonia leucobalia (White-bellied mangrove snake) Myron. Myron karnsi. Myron resetari. Myron richardsonii. Hydrophiinae (Sea snakes) Aipysurus. Aipysurus eydouxii (Spine-tailed sea snake) Aipysurus laevis (Olive sea snake)
Uncovering the history of marine reptiles is crucial to understanding ancient ocean ecosystems because the creatures filled various niches and shaped ocean food chains, Perillo said, creating ...
See text. 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 ...
Plesiosaurus (Greek: πλησίος (plesios), near to + σαῦρος (sauros), lizard) is a genus of extinct, large marine sauropterygian reptile that lived during the Early Jurassic. It is known by nearly complete skeletons from the Lias of England. It is distinguishable by its small head, long and slender neck, broad turtle-like body, a ...
Plesiosauroidea. Plesiosauroidea (/ ˈpliːsiəsɔːr /; Greek: πλησιος plēsios 'near, close to' and σαυρος sauros 'lizard') is an extinct clade of carnivorous marine reptiles. They have the snake -like longest neck to body ratio of any reptile. Plesiosauroids are known from the Jurassic and Cretaceous periods.
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 ...