Wikipedia:Today's featured article/May 11, 2014

Oryzomys peninsulae, also known as the Lower California rice rat, is a species of rodent from western Mexico. Restricted to the southern tip of the Baja California peninsula, it is a member of the genus Oryzomys of family Cricetidae. Twenty-one specimens of O. peninsulae are known, caught in 1896 and 1906 at two locations about 13 km (8 mi) apart along the Río San José, a river in southernmost Baja California Sur. Río San José no longer exists, having fallen prey to irrigation projects, and touristic development of its estuary has resulted in pollution. Biologists working in the area in 1979 and from 1991 to 1993 failed to find O. peninsulae, casting doubt on its continued existence. Medium in size for its genus, it was first described as a separate species, but later lumped into other widespread species until it was reinstated as separate in 2009. It is distinctive in fur color&mdash;grayish brown on the forequarters and reddish brown on the hindquarters&mdash;and in some dimensions of its skull (pictured), with a high braincase, robust zygomatic arches (cheekbones), and long incisive foramina (perforations of the palate between the incisors and the molars).

Recently featured: Voyage of the James Caird – Mirror symmetry (string theory) – Doom Bar