Panamenian Coralsnake

Micrurus stewarti is medium-sized for its genus. Adults usually have a total length (tail included) of 50–70 cm (20–28 in). The maximum recorded total length is 83 cm (33 in). M. stewarti is a bi-colored New World coral snake. Its color pattern consists of only red and black rings. There are no yellow or white rings present. The black rings are usually unequal in width, alternating wider and narrower. The red rings are 2–4 dorsals and 3–6 ventrals wide. The wider black rings are 8–14 dorsals and 7–12 ventrals wide, and the narrower black rings are 5–11 dorsals wide. There are 13–25 black rings on the body. Males have 200–207 ventrals and 50–55 subcaudals, and have supraanal tubercles. Females have 224–228 ventrals and 36–40 subcaudals, and have small supraanal tubercles or weak keels.

The preferred natural habitat of Micrurus stewarti, is forest, at elevations of 20–850 m (66–2,789 ft).

The specific name, stewarti, is in honor of Thomas H. Stewart Jr., United States Army Medical Corps, who collected the holotype. The specific name of the synonym, schmidti, is in honor of American herpetoogist Karl Patterson Schmidt, who had a special interest in coral snakes.