Time-Trimmers for the Taungs Child, or How Old Is "Australopithecus Africanus"
نویسندگان
چکیده
منابع مشابه
Metacarpal proportions in Australopithecus africanus.
Recent work has shown that, despite being craniodentally more derived, Australopithecus africanus had more apelike limb-size proportions than A. afarensis. Here, we test whether the A. africanus hand, as judged by metacarpal shaft and articular proportions, was similarly apelike. More specifically, did A. africanus have a short and narrow first metacarpal (MC1) relative to the other metacarpals...
متن کاملLimb-size proportions in Australopithecus afarensis and Australopithecus africanus.
Previous analyses have suggested that Australopithecus africanus possessed more apelike limb proportions than Australopithecus afarensis. However, due to the errors involved in estimating limb length and body size, support for this conclusion has been limited. In this study, we use a new Monte Carlo method to (1) test the hypothesis that A. africanus had greater upper:lower limb-size proportion...
متن کاملMicrowear, mechanics and the feeding adaptations of Australopithecus africanus.
Recent studies of dental microwear and craniofacial mechanics have yielded contradictory interpretations regarding the feeding ecology and adaptations of Australopithecus africanus. As part of this debate, the methods used in the mechanical studies have been criticized. In particular, it has been claimed that finite element analysis has been poorly applied to this research question. This paper ...
متن کاملTrabecular Evidence for a Human-Like Gait in Australopithecus africanus
Although the earliest known hominins were apparently upright bipeds, there has been mixed evidence whether particular species of hominins including those in the genus Australopithecus walked with relatively extended hips, knees and ankles like modern humans, or with more flexed lower limb joints like apes when bipedal. Here we demonstrate in chimpanzees and humans a highly predictable and sensi...
متن کاملThe feeding biomechanics and dietary ecology of Australopithecus africanus.
The African Plio-Pleistocene hominins known as australopiths evolved a distinctive craniofacial morphology that traditionally has been viewed as a dietary adaptation for feeding on either small, hard objects or on large volumes of food. A historically influential interpretation of this morphology hypothesizes that loads applied to the premolars during feeding had a profound influence on the evo...
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ژورنال
عنوان ژورنال: American Anthropologist
سال: 1967
ISSN: 0002-7294,1548-1433
DOI: 10.1525/aa.1967.69.2.02a00110