ArticleProceedings. Biological sciences2012
Virtual endocranial cast of earliest Eocene Diacodexis (Artiodactyla, Mammalia) and morphological diversity of early artiodactyl brains.
Article in Proceedings. Biological sciences, 2012. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Cited by 16 papers.
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16 citing papers in PubMed, 48 citations in OpenAlex.
- Article
- The allometry of brain size in Euarchontoglires: clade-specific patterns and their impact on encephalization quotients.Journal of mammalogy · 2024Article
- The virtual brain endocast of Trogosus (Mammalia, Tillodontia) and its relevance in understanding the extinction of archaic placental mammals.Journal of anatomy · 2024Article
- Endocranial Casts of Camelops hesternus and Palaeolama sp.: New Insights into the Recent History of the Camelid Brain.Brain, behavior and evolution · 2023Article
- Article
- Evolution of arboreality and fossoriality in squirrels and aplodontid rodents: Insights from the semicircular canals of fossil rodents.Journal of anatomy · 2021Article
- Variable social organization is ubiquitous in Artiodactyla and probably evolved from pair-living ancestors.Proceedings. Biological sciences · 2020Article
- Virtual endocranial and inner ear endocasts of the Paleocene 'condylarth' Chriacus: new insight into the neurosensory system and evolution of early placental mammals.Journal of anatomy · 2020Article
- Unexpected evolutionary patterns of dental ontogenetic traits in cetartiodactyl mammals.Proceedings. Biological sciences · 2019Article
- A Digital Endocranial Cast of the Early Paleocene (Puercan) 'Archaic' MammalJournal of mammalian evolution · 2018Article
- Article
- Virtual endocast of the early Oligocene Cedromus wilsoni (Cedromurinae) and brain evolution in squirrels.Journal of anatomy · 2017Article
- Virtual endocasts of Eocene Paramys (Paramyinae): oldest endocranial record for Rodentia and early brain evolution in Euarchontoglires.Proceedings. Biological sciences · 2016Article
- Endocasts and brain evolution in Anthracotheriidae (Artiodactyla, Hippopotamoidea).Journal of anatomy · 2015Article
- Cerebral complexity preceded enlarged brain size and reduced olfactory bulbs in Old World monkeys.Nature communications · 2015Article
- The inner ear of Diacodexis, the oldest artiodactyl mammal.Journal of anatomy · 2012Article
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2 authors at 2 institutions in 3 countries.
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No grant is acknowledged in the PubMed record.
Abstract
The study of brain evolution, particularly that of the neocortex, is of primary interest because it directly relates to how behavioural variations arose both between and within mammalian groups. Artiodactyla is one of the most diverse mammalian clades. However, the first 10 Myr of their brain evolution has remained undocumented so far. Here, we used high-resolution X-ray computed tomography to investigate the endocranial cast of Diacodexis ilicis of earliest Eocene age. Its virtual reconstruction provides unprecedented access to both metric parameters and fine anatomy of the most complete endocast of the earliest artiodactyl. This picture is assessed in a broad comparative context by reconstructing endocasts of 14 other Early and Middle Eocene representatives of basal artiodactyls, allowing the tracking of the neocortical structure of artiodactyls back to its simplest pattern. We show that the earliest artiodactyls share a simple neocortical pattern, so far never observed in other ungulates, with an almond-shaped gyrus instead of parallel sulci as previously hypothesized. Our results demonstrate that artiodactyls experienced a tardy pulse of encephalization during the Late Neogene, well after the onset of cortical complexity increase. Comparisons with Eocene perissodactyls show that the latter reached a high level of cortical complexity earlier than the artiodactyls.
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