predominately solitary with a small home range. Based on inner ear morphology, Adapis may have been more sensitive to high frequencies rather than low frequencies. This interpretation of inner-ear morphology has led some researchers to compare the social and activity behaviors of A. parisiensis to that of Perodicticus potto and Nycticebus coucang, which are extant primates that are solitary, nocturnal, and monogamous. Moreover, this morphology lends to the hypothesis that A. parisiensis had a small home range with sensitivity to high frequencies that do not broadcast over long distances. References Prehistoric strepsirrhines Eocene primates Prehistoric primate genera Fossil taxa described in 1822 Extinct mammals of Europe Taxa named by Georges Cuvier