ANT203H5 Lecture Notes - Mouse Lemur, Mandibular Symphysis, Fork-Marked Lemur
Document Summary
Primitive traits: moist, naked rhinarium with upper lip attached internally, unfused mandible, placenta is simple, diffuse, and nondeciduate. Derived traits: grooming claw on second pedal digit, incisors and canines of the lower jaw form a grooming comb (except in the. Indriidae and daubentonia: generally large eyes, and always a tapetum lucidum behind the retina, indicating nocturnal adaptation. Gray bamboo lemur: huge eyes (tapetum lucidum) Strepsirhini hand (left) and foot (right, showing the grooming claw ) Aye-aye are highly endangered and highly unique having a long middle finger for eating. They use part of the comb for grooming. Premolars have adapted more or less into the morphology of a canine. Lemurs are restricted to the island of madagascar, off the coast of east africa. Let"s review the history of this fascinating island . Madagascar separated from africa more than 120 million years ago, before the evolution of most modern groups of mammals: many species living in madagascar are seen no where.
