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21 Cards in this Set
- Front
- Back
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Heterodonty |
A mouthful of different types of teeth. |
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Plesiadapiformes |
Earliest primate like mammals Archaic primates Paleocene Arboreal Teeth similar to rodents |
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Euprimates |
All extant primates |
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Plesiadapiformes dental formula |
1.0.2.3 |
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Gallago dental formula |
2.1.3.3 (tooth comb) |
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Talonid |
Broad basin on mandibular molars into which the maxillary molar fits during occlusion (closing the mouth) as it slides between two adjacent trigonids. |
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Dental formula change bias |
Teeth are almost always lost rather than gained. |
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Adapid |
Post orbital bar Conversion eye orbits |
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Proconsul |
Y-5 molars Wider pallet Lack of tail Flexible lumbar region Same length limbs 20 to 17 mya. |
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Miocene |
Age of apes |
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Afropithecus |
18 to 16 mya. Africa Big canines Temporal lines |
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Sivapithecus |
15 to 9 mya. Asia Pronounced canines Tall narrow nasal aperture
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Bipedalism Adaptations |
6 to 7 mya. Valgus articulation of the femur and tibia allows foot to be placed directly below the center of gravity. Arch of foot Adducted big toe Foramen magnum interior |
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Adducted vs. Abducted |
1. Seperated from other toes 2. In line with other toes |
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Laetolai Footprints |
3.6 myo Dated by K-Ar dating |
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C/P 3 complex |
Honing facet on the front of the anterior lower pre-molar and a space in front of it (distema) Ex-chimp Hominins do not have |
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Pallet shape |
Chimp - U shaped Afarensis U shaped Human parabolic |
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Austalopithecus Africanus vs. homo hobilis |
A - Prognathic, U shaped H- More parabolic, less prognathic |
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Neaderthalensis |
Single arch, low long cranial vault, ocipital bun, no chin. Shorter limbs, hold in heat better closer to core. |
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Explanations for chin |
1. Spandrel 2. Stress reduction 3. Sex symbol |
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Adapoids vs. omomyoids |
A. Long snout, small incisor ring in the ear.
O. Short snout, large incisor, ear tube. |
