#ungulate

• Anchitherium — Scientific Latin spelling for anchiteriu; an extinct genus of primitive three-toed equids that lived during the Miocene epoch across North America, Europe, and Asia. This small-sized mammal represents a major evolutionary link, bridging the gap between primitive forest browsers and open-steppe equids.
• Anoplotherium — A fossil ungulate mammal from the late Eocene and Oligocene epochs, characterized by the complete absence of prominent canine teeth and horns, possessing a continuous dentition and a long, robust tail. This extinct genus (Anoplotherium) serves as an essential biostratigraphic marker for reconstructing the fauna and forest environment of the European Paleogene period.
• Anthracotherium — An extinct genus of hippopotamus-like artiodactyl ungulates within the family Anthracotheriidae, that lived during the Oligocene and Miocene epochs across Eurasia and Africa, adapted to a semi-aquatic lifestyle.
• Antilopinae — Scientific name assigned to a subfamily of ruminant bovids, gathering all species of true antelopes and gazelles structurally characterized by slender forms, persistent ringed horns, and legs adapted for leaping and high-speed running. In ecological classification, they represent essential links in savanna and steppe habitats.
• Artiodactyl — An even-toed ungulate mammal that possesses an even number of digits on each foot (two or four), with the axis of the foot passing between the third and fourth digits, which are the most developed; relating to these mammals. Taxonomically, this group includes animals such as Suina (pigs), Tylopoda (camels), and Ruminantia (deer, cows, sheep), structurally adapted for running or rumination.