Pattern and process in hominin brain size evolution are scale-dependent Article Swipe
Andrew Du
,
Andrew M. Zipkin
,
Kevin G. Hatala
,
Elizabeth Renner
,
Jennifer L. Baker
,
Serena Bianchi
,
Kallista H. Bernal
,
Bernard Wood
·
YOU?
·
· 2018
· Open Access
·
· DOI: https://doi.org/10.1098/rspb.2017.2738
YOU?
·
· 2018
· Open Access
·
· DOI: https://doi.org/10.1098/rspb.2017.2738
A large brain is a defining feature of modern humans, yet there is no consensus regarding the patterns, rates and processes involved in hominin brain size evolution. We use a reliable proxy for brain size in fossils, endocranial volume (ECV), to better understand how brain size evolved at both clade- and lineage-level scales. For the hominin clade overall, the dominant signal is consistent with a gradual increase in brain size. This gradual trend appears to have been generated primarily by processes operating within hypothesized lineages—64% or 88% depending on whether one uses a more or less speciose taxonomy, respectively. These processes were supplemented by the appearance in the fossil record of larger-brained Homo species and the subsequent disappearance of smaller-brained Australopithecus and Paranthropus taxa. When the estimated rate of within-lineage ECV increase is compared to an exponential model that operationalizes generation-scale evolutionary processes, it suggests that the observed data were the result of episodes of directional selection interspersed with periods of stasis and/or drift; all of this occurs on too fine a timescale to be resolved by the current human fossil record, thus producing apparent gradual trends within lineages. Our findings provide a quantitative basis for developing and testing scale-explicit hypotheses about the factors that led brain size to increase during hominin evolution.
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Metadata
- Type
- article
- Language
- en
- Landing Page
- https://doi.org/10.1098/rspb.2017.2738
- https://royalsocietypublishing.org/doi/pdf/10.1098/rspb.2017.2738
- OA Status
- bronze
- Cited By
- 70
- References
- 68
- Related Works
- 10
- OpenAlex ID
- https://openalex.org/W2789122238
All OpenAlex metadata
Raw OpenAlex JSON
- OpenAlex ID
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https://openalex.org/W2789122238Canonical identifier for this work in OpenAlex
- DOI
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https://doi.org/10.1098/rspb.2017.2738Digital Object Identifier
- Title
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Pattern and process in hominin brain size evolution are scale-dependentWork title
- Type
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articleOpenAlex work type
- Language
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enPrimary language
- Publication year
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2018Year of publication
- Publication date
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2018-02-21Full publication date if available
- Authors
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Andrew Du, Andrew M. Zipkin, Kevin G. Hatala, Elizabeth Renner, Jennifer L. Baker, Serena Bianchi, Kallista H. Bernal, Bernard WoodList of authors in order
- Landing page
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https://doi.org/10.1098/rspb.2017.2738Publisher landing page
- PDF URL
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https://royalsocietypublishing.org/doi/pdf/10.1098/rspb.2017.2738Direct link to full text PDF
- Open access
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YesWhether a free full text is available
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bronzeOpen access status per OpenAlex
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https://royalsocietypublishing.org/doi/pdf/10.1098/rspb.2017.2738Direct OA link when available
- Concepts
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Brain size, Encephalization, Clade, Evolutionary biology, Biology, Human evolution, Lineage (genetic), Fossil Record, Australopithecus, Phylogenetics, Paleontology, Gene, Magnetic resonance imaging, Radiology, Medicine, BiochemistryTop concepts (fields/topics) attached by OpenAlex
- Cited by
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70Total citation count in OpenAlex
- Citations by year (recent)
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2025: 8, 2024: 6, 2023: 10, 2022: 10, 2021: 8Per-year citation counts (last 5 years)
- References (count)
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68Number of works referenced by this work
- Related works (count)
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10Other works algorithmically related by OpenAlex
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| abstract_inverted_index.exponential | 136 |
| abstract_inverted_index.Paranthropus | 122 |
| abstract_inverted_index.evolutionary | 141 |
| abstract_inverted_index.hypothesized | 83 |
| abstract_inverted_index.interspersed | 157 |
| abstract_inverted_index.quantitative | 193 |
| abstract_inverted_index.supplemented | 102 |
| abstract_inverted_index.disappearance | 117 |
| abstract_inverted_index.lineage-level | 51 |
| abstract_inverted_index.respectively. | 98 |
| abstract_inverted_index.larger-brained | 111 |
| abstract_inverted_index.lineages—64% | 84 |
| abstract_inverted_index.scale-explicit | 199 |
| abstract_inverted_index.within-lineage | 129 |
| abstract_inverted_index.operationalizes | 139 |
| abstract_inverted_index.smaller-brained | 119 |
| abstract_inverted_index.Australopithecus | 120 |
| abstract_inverted_index.generation-scale | 140 |
| cited_by_percentile_year.max | 100 |
| cited_by_percentile_year.min | 94 |
| corresponding_author_ids | https://openalex.org/A5030613783 |
| countries_distinct_count | 2 |
| institutions_distinct_count | 8 |
| corresponding_institution_ids | https://openalex.org/I193531525 |
| citation_normalized_percentile.value | 0.99694089 |
| citation_normalized_percentile.is_in_top_1_percent | True |
| citation_normalized_percentile.is_in_top_10_percent | True |