ANTH 1001 Test 3

ANTH 1001 Test 3 - Paleocene 65-55 mya our authors do not...

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Paleocene 65-55 mya our authors do not consider an species of the Paleocene to be primates Eocene 55-34 mya importance is the first unquestioned in the fossil record these early primates are of the prosimian “grade” of anatomy anatomies suggesting the species’ primate affinity: -eyes facing forwardly -postorbital bar -shortened snout -prehensile (grasping) hands and feet -nails at the end of their digits, not claws -large brain size where species are found -Eocene primates are found principally in north America and Europe -in the lattes part of the Eocene, species are found in Asia and North Africa -species in NA and Europe are similar to one another in anatomy. -these similarities are explained by the intercontinental connection of NA and Europe via Greenland during Paleocene and part of the Eocene environment -tropical and subtropical force in NA and Europe taxonomy and phylogeny -two groups of primates: adapids and omomyids adapids may be ancestral to lemurs and lorises omomyids may be ancestral to tarsiers and anthropods sundry comments -broad range of species; some species were diurnally adapted where others were nocturnally adapted -most species were insectivorous; some species may have been frugivores or folivorous -species were arboreally adapted; their locomotion was quadrepedal running and leaping. -some species show sexual dimorphism in canine size. -no species shows a toothcomb (dental comb) Oligocene 34-23 mya importance -first unquestioned evidence in the fossil record where fossils are found -predominance of fossils are from the Fayum site in Egypt dates of fossils - 33-35 mya -site is dated by potassium argon technique Fayum site was a tropical forest, close to the shores of the Tethys Sea taxonomy and phylogeny
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-two groups of anthropoids: parapithecines and propliopithecines parapithecines (e.g. apidium) have dental formula of 2,1,3,3/2,1,3,3 this dental formula is the same as that of some species of south American monkeys ancestral from NW monkeys proliopithecines (e.g. agyptopithecus) have a dental formula of 2,1,2,3/2,1,2,3 this dental formula is the same as that of modern catarrhines ancestral from OW monkeys and apes and humans April 14, 2005 -Inferences -Body Size – Apidium 2-4 lbs - Aegyptopithecus 12-16 lbs -Diet – Frugivory -Time of Activity – Diurnality -Locomotion – arboreal quadrupeds -Social organization – Aegyptopithecus polygyny -Miocene: 23-5 mya -Importance – First definite hominoids in fossil record (these species are classified as hominoids by the Y-5 cusp pattern on the molars) -the divergence between apes and hominids occurred during the late Miocene -the maximum diversity of hominoids occurred during the Miocene -Where fossils are found -Africa (in early and middle Miocene); Europe and Asia (in middle and late Miocene) -Geological event that explains hominoid geographical distribution -In the early Miocene (23-16 mya), Africa was an island continent. Africa was separated from Europe and Asia by the Tethys Sea. Approximately 16
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ANTH 1001 Test 3 - Paleocene 65-55 mya our authors do not...

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