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  2. List of perissodactyls - Wikipedia

    en.wikipedia.org/wiki/List_of_perissodactyls

    Perissodactyla is an order of placental mammals composed of odd-toed ungulates – hooved animals which bear weight on one or three of their five toes with the other toes either present, absent, vestigial, or pointing backwards. Members of this order are called perissodactyls, and include rhinoceroses, tapirs, and horses.

  3. Convergent evolution - Wikipedia

    en.wikipedia.org/wiki/Convergent_evolution

    Convergent evolution is the independent evolution of similar features in species of different periods or epochs in time. Convergent evolution creates analogous structures that have similar form or function but were not present in the last common ancestor of those groups. The cladistic term for the same phenomenon is homoplasy.

  4. List of artiodactyls - Wikipedia

    en.wikipedia.org/wiki/List_of_artiodactyls

    Artiodactyla is an order of placental mammals composed of even-toed ungulates – hooved animals which bear weight equally on two of their five toes with the other toes either present, absent, vestigial, or pointing posteriorly – as well as their descendants, the aquatic cetaceans. Members of this order are called artiodactyls.

  5. Lists of animals - Wikipedia

    en.wikipedia.org/wiki/Lists_of_animals

    Over 1.5 million living animal species have been described—of which around 1 million are insects—but it has been estimated there are over 7 million in total. Animals range in size from 8.5 millionths of a metre to 33.6 metres (110 ft) long and have complex interactions with each other and their environments, forming intricate food webs.

  6. History of Animals - Wikipedia

    en.wikipedia.org/wiki/History_of_Animals

    History of Animals (Greek: Τῶν περὶ τὰ ζῷα ἱστοριῶν, Ton peri ta zoia historion, "Inquiries on Animals"; Latin: Historia Animalium, "History of Animals") is one of the major texts on biology by the ancient Greek philosopher Aristotle, who had studied at Plato's Academy in Athens. It was written in the fourth century BC ...

  7. Evolution of cetaceans - Wikipedia

    en.wikipedia.org/wiki/Evolution_of_cetaceans

    It is possible that some protocetids had flukes. However, it is clear that they were adapted even further to an aquatic life-style. In Rodhocetus, for example, the sacrum (a bone that, in land-mammals, is a fusion of five vertebrae that connects the pelvis with the rest of the vertebral column) was divided into loose vertebrae. However, the ...

  8. Boreoeutheria - Wikipedia

    en.wikipedia.org/wiki/Boreoeutheria

    Boreoeutheria (/ boʊˌriːoʊjuːˈθɛriə /, "northern true beasts") is a magnorder of placental mammals that groups together superorders Euarchontoglires and Laurasiatheria. [1][2][5] With a few exceptions, [a] male boreoeutherians have a scrotum, an ancestral feature of the clade. [6][7] The sub-clade Scrotifera was named after this ...

  9. Animals in ancient Greece and Rome - Wikipedia

    en.wikipedia.org/wiki/Animals_in_ancient_Greece...

    Animals had a variety of roles and functions in ancient Greece and Rome. Fish and birds were served as food. Species such as donkeys and horses served as work animals. The military used elephants. It was common to keep animals such as parrots, cats, or dogs as pets. Many animals held important places in the Graeco-Roman religion or culture.

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