期刊
EVOLUTIONARY ANTHROPOLOGY
卷 31, 期 4, 页码 199-212出版社
WILEY
DOI: 10.1002/evan.21955
关键词
Anagenesis versus cladogenesis; Mosaic evolution; pan-African hypothesis; punctuationism; single-origin hypothesis; speciation of Homo sapiens
类别
资金
- Fondazione Cassa di Risparmio di Padova e Rovigo
The scenario of Homo sapiens origin within Africa has become complex, with the pan-African perspective challenging the single-origin hypothesis. This paper reviews the evidence for each model and proposes a synthesis that better aligns with evolutionary theory.
The scenario of Homo sapiens origin/s within Africa has become increasingly complex, with a pan-African perspective currently challenging the long-established single-origin hypothesis. In this paper, we review the lines of evidence employed in support of each model, highlighting inferential limitations and possible terminological misunderstandings. We argue that the metapopulation scenario envisaged by pan-African proponents well describes a mosaic diversification among late Middle Pleistocene groups. However, this does not rule out a major contribution that emerged from a single population where crucial derived features-notably, a globular braincase-appeared as the result of a punctuated, cladogenetic event. Thus, we suggest that a synthesis is possible and propose a scenario that, in our view, better reconciles with consolidated expectations in evolutionary theory. These indicate cladogenesis in allopatry as an ordinary pattern for the origin of a new species, particularly during phases of marked climatic and environmental instability.
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