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Baby Reptiles Cute and Funny Reptile Videos Compilation 2018 Reptiles Adorables Video Recopilación Animal Planet VideosBaby reptiles are cute and funny Baby reptiles are awesome Check out these cute baby reptiles and funny baby reptiles in this cute and funny baby reptiles videos compilation Los reptiles bebes son lindos y adorables Los reptiles bebes son increíbles Vea esta divertida recopilación graciosa de vídeos de reptiles bebes VIDEO PLAYLISTS Reptiles are tetrapod animals in the class Reptilia comprising today s turtles crocodilians snakes amphisbaenians lizards tuatara and their extinct relatives The study of these traditional reptile orders historically combined with that of modern amphibians is called herpetology Because some reptiles are more closely related to birds than they are to other reptiles e g crocodiles are more closely related to birds than they are to lizards the traditional groups of reptiles listed above do not together constitute a monophyletic grouping or clade For this reason many modern scientists prefer to consider the birds part of Reptilia as well thereby making Reptilia a monophyletic class The earliest known proto reptiles originated around 312 million years ago during the Carboniferous period having evolved from advanced reptiliomorph tetrapods that became increasingly adapted to life on dry land Some early examples include the lizard like Hylonomus and Casineria In addition to the living reptiles there are many diverse groups that are now extinct in some cases due to mass extinction events In particular the Cretaceous Paleogene extinction event wiped out the pterosaurs plesiosaurs ornithischians and sauropods as well as many species of theropods including troodontids dromaeosaurids tyrannosaurids and abelisaurids along with many Crocodyliformes and squamates e g mosasaurids Modern non avian reptiles inhabit every continent with the exception of Antarctica If birds are classed as reptiles then all continents are inhabited Several living subgroups are recognized Testudines turtles and tortoises approximately 400 species Rhynchocephalia tuatara from New Zealand 1 species Squamata lizards snakes and worm lizards over 9 600 species Crocodilia crocodiles gavials caimans and alligators 25 species and Aves birds 10 000 species Reptiles are tetrapod vertebrates creatures that either have four limbs or like snakes are descended from four limbed ancestors Unlike amphibians reptiles do not have an aquatic larval stage Most reptiles are oviparous although several species of squamates are viviparous as were some extinct aquatic clades the fetus develops within the mother contained in a placenta rather than an eggshell As amniotes reptile eggs are surrounded by membranes for protection and transport which adapt them to reproduction on dry land Many of the viviparous species feed their fetuses through various forms of placenta analogous to those of mammals with some providing initial care for their hatchlings Extant reptiles range in size from a tiny gecko Sphaerodactylus ariasae which can grow up to 17 mm 0 7 in to the saltwater crocodile Crocodylus porosus which may reach 6 m 19 7 ft in length and weigh over 1 000 kg 2 200 lb
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もうすでに2年になりました。LAYLAのカバンの中身紹介!果たして2年前とはどう変わったでしょうか?持ち物は?服は?新しいLAYLAのカバンの中身一気に紹介です It's of been two years now since the last What's ...
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Мастер-класс по лепке розы - самый быстрый и легкий способ создания цветка, где за 1 минуту можно создать 20-30 и больше лепестков...
We've made Pikachu-themed ice cream, with an emphasis on look and overall visual impression. Just take a quick glance and let your...
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