Characterization, density and distribution of mechanoreceptor sensillas on cephalic scales of two species of snakes inhabiting different aquatic environments

For the first time in the neotropics we describe the morphology and analyze the distribution and density of mechanoreceptor sensillas located on the cephalic scales of the aquatic snakes Helicops pastazae and Helicops angulatus. Both species studied here differ in their ecological habitats, i.e. H....