ABSTRACT
Anatomical adaptations are the internal reflections of the morphological and behavioural modifications of subterranean animals. Total darkness, almost unique to the subterranean environment, favours those organisms that have developed or are in the process of developing non-visual sensory structures. These are represented by any structure employed in any kind of sensory reception: mechanical (air currents, touch), olfactory (smell), gustatory (taste), or auditory (sounds). These sensory structures tend to be more highly developed in cave animals compared to epigean organisms.
