Mammal Species

Definition of Mammal Species Hierarchical Category as it relates to Animals, Amphibians, Arthropods, Actinopterygii

A group of warm-blooded vertebrates constituting the class Mammalia, characterized by the presence of mammary glands which in females produce milk for feeding (nursing) their young, a neocortex (a region of the brain), fur or hair, and three middle ear bones. This category is within the broader scope of animals and shares several traits and evolutionary history with other animal groups such as Actinopterygii (ray-finned fishes), Arthropods (invertebrate animals with an exoskeleton, segmented body, and paired jointed appendages), and Amphibians (cold-blooded vertebrates that do not have amniotic eggs).

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Child Hierarchical Categories