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  2. Mammal - Wikipedia

    en.wikipedia.org/wiki/Mammal

    A mammal (from Latin mamma 'breast') [1] is a vertebrate animal of the class Mammalia (/ m ə ˈ m eɪ l i. ə /).Mammals are characterised by the presence of milk-producing mammary glands for feeding their young, a broad neocortex region of the brain, fur or hair, and three middle ear bones.

  3. Mammal classification - Wikipedia

    en.wikipedia.org/wiki/Mammal_classification

    In 1997, the classification of mammals was revised by Malcolm C. McKenna and Susan K. Bell. [10] The Classification of Mammals Above the species level, here referred to as the "McKenna/Bell classification", is a comprehensive work on the systematics, relationships, and occurrences of all mammal taxa, living and extinct, down through the rank of ...

  4. Evolution of mammals - Wikipedia

    en.wikipedia.org/wiki/Evolution_of_mammals

    Figure 1:In mammals, the quadrate and articular bones are small and part of the middle ear; the lower jaw consists only of dentary bone.. While living mammal species can be identified by the presence of milk-producing mammary glands in the females, other features are required when classifying fossils, because mammary glands and other soft-tissue features are not visible in fossils.

  5. Portal:Mammals - Wikipedia

    en.wikipedia.org/wiki/Portal:Mammals

    A mammal (from Latin mamma 'breast') is a vertebrate animal of the class Mammalia (/ m ə ˈ m eɪ l i. ə /).Mammals are characterised by the presence of milk-producing mammary glands for feeding their young, a broad neocortex region of the brain, fur or hair, and three middle ear bones.

  6. Monotreme - Wikipedia

    en.wikipedia.org/wiki/Monotreme

    The sequencing of the platypus genome has also provided insight into the evolution of a number of monotreme traits, such as venom and electroreception, as well as showing some new unique features, such as monotremes possessing 5 pairs of sex chromosomes and that one of the X chromosomes resembles the Z chromosome of birds, [13] suggesting that ...

  7. Therapsida - Wikipedia

    en.wikipedia.org/wiki/Therapsida

    Therapsida [a] is a clade comprising a major group of eupelycosaurian synapsids that includes mammals and their ancestors and close relatives. Many of the traits today seen as unique to mammals had their origin within early therapsids, including limbs that were oriented more underneath the body, resulting in a more "standing" quadrupedal posture, as opposed to the lower sprawling posture of ...

  8. 40 Facts About Animals That Might Make You Look Like The ...

    www.aol.com/68-fascinating-animal-facts-probably...

    U.S. Interior Secretary Deb Haaland announced Wednesday that the Apache trout — Arizona’s state fish — has been removed from the federal list of endangered and threatened species following ...

  9. List of examples of convergent evolution - Wikipedia

    en.wikipedia.org/wiki/List_of_examples_of...

    Short-lived breeders: species that are in the juvenile phase for most of their lives. The adult lives are so short most do not have working mouth parts. Unrelated species: cicada, mayflies, some flies, dragonfly, silk moths, and some other moths. [152] [153] Katydids and frogs both make loud sounds with a sound-producing organs to attract ...