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Giant Bear-dog

Amphicyon ingens lived from 20 to approximately 6 million years.

Type: Amphicyonid
Diet: Carnivore
Size: 2.5 m (8 ft) long.
Protection status: Extinct

Scientific Classification Kingdom: Animalia Phylum: Chordata Class: Mammalia Order: Carnivora Family: Amphicyonidae Subfamily: Amphicyoninae Genus: Amphicyon Species: Amphicyon ingens

Amphicyon was the typical bear-dog amphicyonid with morphology similar to both bears and dogs. With its robust build and maximum length of 2.5 m (8 ft), the largest species looked more like a bear than a dog. It had a large heavy tail, thick neck, robust limbs and teeth like a wolf. It was probably an omnivore with a lifestyle comparable to that of the brown bear.

Body mass A single specimen was examined by Legendre and Roth and estimated to have a body mass of 84.2 kg (190 lb), roughly half that of Ischyrocyon and twice that of Epicyon which shared its time period and habitat. A. ingens was much bigger: Sorkin (2008) estimated the largest known specimen (AM 68108) to weigh 600 kg, making it the largest amphicyonid and one of the largest known carnivorous land mammals.

The species was originally described by W. Matthew in 1924 from specimens found in the Olcott Formation, Sioux County, Nebraska. Specimens attributed to this species have since been found in California, Colorado, and New Mexico.

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