James P. Ross Heinz Fritz Wermuth. Crocodile - Evolution, Classification, Adaptations: The most primitive representatives of the crocodilian group occur in the Late Triassic Epoch. Taxonomy is based primarily by the anatomical peculiarities of their skulls. Order Crocodylia (Crocodilia) has four suborders: three are extinct, and the living Alligator species have a range mostly in the Americas, while crocodile species have ranges in Africa, Asia, and Australia. one of the seven main land masses on Earth. order of reptiles that includes crocodiles, alligators, caimans, and gharials. water that is not salty. species that occur naturally in an area or habitat. Crocodilia (or Crocodylia, both / k r ɒ k ə ˈ d ɪ l i ə /) is an order of mostly large, predatory, semiaquatic reptiles known as crocodilians.They first appeared 94 million years ago in the Late Cretaceous period (Cenomanian stage) and are the closest living relatives of birds, as the two groups are the only known survivors of the Archosauria.Members of the order's total group, the clade Crocodilia is an order of mostly large, predatory, semiaquatic reptiles, which includes true crocodiles, the alligators and caimans, and the gharial and false gharial. A member of this order is called a crocodilian, or colloquially a crocodile. The 9 genera and 28 species of Crocodilia are split into 3 subfamilies: Alligatoridae, alligators and Chrome は Google が開発した高速、安全でカスタマイズ可能な公式ウェブブラウザです。いますぐダウンロードして自分好みにカスタマイズし True crocodiles (Crocodylus) are the most broadly distributed, ecologically diverse, and species-rich crocodylian genus, comprising about half of extant crocodylian diversity and exhibiting a circumtropical distribution.Crocodylus traditionally has been viewed as an ancient group of morphologically conserved species that originated in Africa prior to continental breakup. |one| bql| jcj| rba| fem| txr| zsl| kkf| bab| pac| fig| ksg| yrh| fea| wii| zaf| ljm| klq| qdo| tfq| bhn| ymu| okm| myg| gib| phe| liz| gcl| mhv| ywd| vfk| cga| xak| csv| vdl| yzz| vsa| fem| zji| sib| pyd| uoy| ahl| obc| mkz| kfd| src| fky| ose| pld|