Abstract
Plesiophrictus nilagiriensis sp. nov., a new mygalomorph spider of the family Theraphosidae is described from the Western Ghats of Tamil Nadu, India. Illustrations, images and natural history are included. The new species is distinct from other known species in carapace length, absence of apical spur on tibia I, presence of single metaspine on metatarsus II, differences in scopulae, and spermathecae structure.