What is (a) A group of herbivorous mammals characterized by having the hoofs in a single series around the foot, as the elephant, rhinoceros, etc. (b) A group of perching birds which are anisodactylous called?

anisodactyla — (a) A group of herbivorous mammals characterized by having the hoofs in a single series around the foot, as the elephant, rhinoceros, etc. (b) A group of perching birds which are anisodactylous. (Webster's 1913.)

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