Like all members of genus
Scytalopus, the jalca tapaculo is a small, plump, dull-colored bird. It is about long. Males weigh about and females about . The male's crown and much of the face are dark gray, with a silvery white
supercilium of variable size. Some also have a silvery crown. The nape and mantle are dark gray washed with dark reddish brown; the lower back and rump are cinnamon brown with blackish curving bars near the feather ends. The outer tail feathers of most males are dark reddish brown with narrow cinnamon brown bars near the feather ends. The inner tail feathers, and all of the tail feathers on some individuals, are banded with dusky gray and cinnamon. The wings are generally brown with cinnamon and blackish markings. The throat and belly are light gray, the breast a darker gray, and the lower flanks and vent area tawny brown with blackish markings. The female is similar to the male, but generally browner ranging from cinnamon brown to olive brown. ==Distribution and habitat==