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Miocene hominoid palatofacial morphology.
Folia Primatologica; International Journal of Primatology
|January 1, 1980
Summary
Early Miocene hominoids like Proconsul show primitive catarrhine facial patterns, unlike modern apes. By the Middle Miocene, hominoid facial and postcranial traits evolved, as seen in Sivapithecus.
Area of Science:
- Paleoanthropology
- Primate Evolution
- Comparative Anatomy
Background:
- The evolutionary history of hominoids is traced through fossil evidence.
- Understanding early hominoid morphology is key to reconstructing primate phylogeny.
Purpose of the Study:
- To compare the palatofacial morphology of early Miocene hominoids (Proconsul species) with extant catarrhines.
- To determine when typical hominoid facial and postcranial patterns emerged during the Miocene.
Main Methods:
- Comparative analysis of fossil hominoid palatofacial and postcranial remains.
- Comparison with morphological data from extant catarrhine primates (apes and monkeys).
Main Results:
- Early Miocene hominoids (Proconsul africanus, P. nyanzae, P. major) exhibit primitive catarrhine, not modern great ape, facial features.
- Proconsul morphology is more similar to extant cercopithecoids (Old World monkeys) than to modern apes.
- By the Middle Miocene, Sivapithecus meteai displays recognizable hominoid palatofacial morphology.
- The evolution of the hominoid postcranial pattern also becomes evident by the Middle Miocene.
Conclusions:
- Hominoid palatofacial and postcranial characteristics evolved gradually, becoming distinct by the Middle Miocene.
- Early Miocene hominoids represent a transitional stage in catarrhine evolution.
- Sivapithecus provides evidence for the emergence of derived hominoid traits during the Middle Miocene.