Leptomeryx

Leptomeryx is an extinct genus of ruminant of the family Leptomerycidae, endemic to North America during the Eocene through Oligocene 38—24.8 Mya, existing for approximately 13.2 million years.

Taxonomy
Leptomeryx was named by Leidy (1853). Its type is Leptomeryx evansi. It was assigned to Leptomerycinae by Matthew (1908); to Hypertragulidae by Cook (1934); and to Leptomerycidae by Leidy (1853) and then by Carroll (1988).

Morphology
Leptomeryx was a small deer-like ruminant with somewhat slender body.

Body mass
Four specimens were examined by Legendre and Roth for body mass.[4]
 * Specimen 1 weighed an estimated: 7.62 kg (17 lb)
 * Specimen 2: 14.7 kg (32 lb)
 * Specimen 3: 6.24 kg (14 lb)
 * Specimen 4: 5.72 kg (13 lb)