What are the differences between adapoids and Omomyoids?
Omomyoids (omomyiforms or omomyids, according to some) are members of the superfamily Omomyoidea . The adapoids were mainly diurnal and herbivorous, with some achieving larger sizes than any plesiadapiforms (10 kg; 22 lbs.). By contrast, the omomyoids were mainly nocturnal, insectivorous and frugivorous, and small.
What do the Catarrhines include?
Catarrhines include gibbons, orangutans, gorillas, chimpanzees, and humans. Two superfamilies that make up the parvorder Catarrhini are Cercopithecoidea (Old World monkeys) and Hominoidea (apes).
What are ischial callosities used for?
Ischial callosities are bilateral pads of thickened epidermis, located in the gluteal region, that are used for sitting on thin branches during feeding in the peripheral branch zone. Ischial callosities are found in cercopithecoid monkeys, gibbons, and siamangs.
How do haplorhines differ from Strepsirhines?
Strepsirhines have longer snouts, smaller brains and a more highly developed sense of smell than haplorhines. Haplorhines have shorter faces, larger brains and a more highly developed sense of vision than Strepsirhines; their eyes face more forward than the eyes of strepsirhines.
What are plesiadapiforms also called?
Plesiadapiforms are also called: proprimates. The calcaneus (heel bone) of Eosimias suggests that it may be a very primitive: anthropoid.
What does Euprimates mean?
Noun. euprimate (plural euprimates) Any true primate (member of the order Primates but not of the order Dermoptera)
What are the two superfamilies of catarrhines?
This grouping comprises the two families Hylobatidae, the lesser apes or gibbons, and Hominidae, the great apes, including orangutans, gorillas, chimpanzees, bonobos, humans, and related extinct genera, such as the prehuman australopithecines and the giant orangutan relative Gigantopithecus.
Do Old World monkeys have ischial callosities?
Old World monkeys all develop ischial callosities (specialized calluses used in sitting) prenatally and have the same dental formula as apes and humans: two incisors, a canine, two premolars or bicuspids, and three molars in each quadrant. Sexual size dimorphism is pronounced in many of the larger species.
How many teeth do haplorhines have?
They are small primates, weighing about 4 ounces and roughly 5 inches in length, although with their tail, which may have a tuft of fur on the end, they almost double in length. Like some Strepsirhines, tarsiers have toilet claws and 36 teeth.
How are Strepsirhine primates different from Haplorrhine primates?
Strepsirhines still show the primitive clawed condition on some digits, while haplorhines show nails on all digits. While stresirhines show greater divergance of the thumb than nonprimate mammals and have grasping hands and feet, they lack the extensive thumb opposability that characterizes most anthropoids.