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Continue on to Set # 16C. Teeth / Jaw Diet. the lower jaw = mandible related term: “mandibular torus”. The jaw . . . in apes mandibles slant outward and downward, without a chin (“prognathism”) . Pongid Prognathism . (Line of greatest muscle force is shown in red.).
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Continue on to Set # 16C Teeth / Jaw Diet
the lower jaw = mandible related term: “mandibular torus”
The jaw . . . in apes mandibles slant outward and downward, without a chin (“prognathism”)
Pongid Prognathism. (Line of greatest muscle force is shown in red.) Understanding Physical Anthropology and Archaeology, 8th ed., p. 245
The jaw . . . in humans lower jaw is comparatively small, but always has a distinct chin
Modern human cranium. Understanding Physical Anthropology and Archaeology, 9th ed., p. 432
The teeth . . . apes have a “simian shelf” rather than a chin
The teeth . . . ape teeth have cusp patterns for the lower molars similar to those of humans . . .
The teeth . . . rather than a “plus-4” pattern . . . apes have a “Y-5” pattern
plus-4 Y-5 Y-5
The teeth . . . apes (and monkeys) still possess conical, daggerish canines which project well beyond the surface of the opposite teeth . . .
The teeth . . . apes (and monkeys) have diastemata, spaces opposite the large canine teeth. . . (“diastemata” = plural of “diastema”)
The teeth . . . diastema = a space in the tooth row that accommodates one or more teeth from the opposite jaw
Teeth of a male patas monkey. Understanding Physical Anthropology and Archaeology, 9th ed., p. 205
The teeth . . . both apes and humans have 8 incisors I 4 canines C 8 premolars P 12 molars M abbreviations
The teeth . . . both apes and humans have the same “dental formula” 2.1.2.3. 2.1.2.3.
Donald Johanson and Maitland Edey, Lucy: The Beginnings of Humankind. NY: Simon & Schuster, 1981.
Dental formulae Understanding Physical Anthropology and Archaeology, 9th ed., p. 120
The teeth . . . apes have a “U”-shaped jaw . . .
The teeth . . . in humans the plate is arched and curves outward at the back (parabolic arch) . . .
The teeth . . . the overall evolutionary trend is toward smaller teeth
Continue on to Set # 16D Next: Other Changes Understanding Physical Anthropology and Archaeology, 9th ed., p. 136