Canis rufus rufus or the Texas Red wolf refers to a type of Red wolf

Red Wolf

The red wolf is a North American canid which once roamed throughout the Southeastern United States and is a glacial period survivor of the Late Pleistocene epoch...

 that lived in Texas

Texas

Texas is the second largest U.S. state by both area and population, and the largest state by area in the contiguous United States.The name, based on the Caddo word "Tejas" meaning "friends" or "allies", was applied by the Spanish to the Caddo themselves and to the region of their settlement in...

. As the red wolf is no longer considered a species in itself but a subspecies of Canis lupus, Canis lupus rufus, and because Taxonomy

Taxonomy

Taxonomy is the science of identifying and naming species, and arranging them into a classification. The field of taxonomy, sometimes referred to as "biological taxonomy", revolves around the description and use of taxonomic units, known as taxa...

has no taxon below the subspecies level, it now would be considered a type, kind, or variety of the subspecies, perhaps Canis lupus rufus Var. "Rufus".

It may crossbreed with coyotes or domestic dogs.