[Characteristics of the absorption surface of the intestinal epithelium of Alouatta caraya].

Electron microscopy of the absorption surface of the jejunal epithelium of the howler monkey Alouatta caraya showed the presence of core filaments implanted at the level of the terminal web in the microvilli. These microvilli are 5 to 7 mum long and up to 5 mum thick, their extraordinary development is attributed to a conditioned adaptation of the species to its feeding habits and nature of absorption.