Abstract
We give the first description of males of the jumping spider genus Piranthus Thorell, 1895, of the Indian species Piranthus planolancis Malamel, Nafin, Sudhikumar & Sebastian, 2019. Their palp is unusual in two aspects: the long embolus (longer than in most baviines) arises toward the proximal from its base before curling and proceeding distally, and the retrolateral tibial apophysis is an especially long blade. We present new illustrations of the female, and extend the range of the species from Kerala to Karnataka.