Small snake, with a known maximum length of 60 cm, its body is thin and moderately robust, with a large broad head, well differentiated from the neck. It has long and high internasal scales, and the rostral scale has a moderate elevation.

Its habits are mostly unknown, it is terrestrial and its activity appears to be at night time. Its eating habits are unknown, like the other species of its genus it probably eats rodents, lizards, and frogs. Its reproduction is viviparous, and it is not very abundant.

Endemic to Costa Rica, it seems to have a restricted distribution, since it is only seen on low elevations (400 - 600 m) of the tropical rainforest in the areas of Ujarras and the Buenos Aires Volcano (Central Valley), southwest of the province of Puntarenas.