ZOOL 461 Lecture Notes - Lecture 7: Aye-Aye, Lorisidae, Strepsirrhini
Document Summary
Euprimates (true primates) appeared 55 mya fossils date from early paleocene of n am table 12. 1 characteristics in book. Locomotion: grasping hands and feet, nails present on all or most digits, hind limb dominance during locomotion, center of gravity shifted toward hind limbs. Stereoscopic vision: forward rotation of orbits, narrowing of interorbital distance, enlargement of orbital cavity, allows for depth perception. Brain characteristics: increased fetal brain size, more energy in growing the young"s brain rather than growing big body. Reproductive and development characteristics: descent of testes early in life, long gestation, small litters, late sexual maturity, long life span. Dentition: loss of one incisor and one premolar. Suborder strepsirrhini (lemurs: 5 families of lemurs, family lorisidae (lorises and pottos) Sub-saharan arfica, india, sri lanka, se asa, east indies. 5 genera and 9 species low meta rates perhaps associated with detoxifaction: family daubentoniidae (aye-aye) Short skull, large ears, and bushy tail. 3rd long digit and slender insectivore: family galagidae.
