2020
DOI: 10.1016/j.cub.2020.03.060
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Abstract: Highlights d Dinosaurs and early birds had similar relative brain sizes d Major shifts in brain-body integration occur in the aftermath of the K-Pg extinction d Rates of brain-body evolution are highest in non-avian dinosaurs, early-diverging birds, parrots, and crows d Corvids, like hominins, evolved larger relative brains and bodies simultaneously

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Cited by 75 publications
(112 citation statements)
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References 61 publications
(74 reference statements)
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“…This temporal clustering suggests that changes in the relative growth trajectory of brain and body size were fundamental for mammalian diversification in the wake of the K-Pg mass extinction. This aligns with a pattern recently observed in birds ( 12 ), suggesting that ecological radiation and subsequent niche expansion following the K-Pg mass extinction played a major role in shaping the trajectories by which both birds and mammals became the largest-brained vertebrate classes.…”
Section: Resultssupporting
confidence: 89%
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“…This temporal clustering suggests that changes in the relative growth trajectory of brain and body size were fundamental for mammalian diversification in the wake of the K-Pg mass extinction. This aligns with a pattern recently observed in birds ( 12 ), suggesting that ecological radiation and subsequent niche expansion following the K-Pg mass extinction played a major role in shaping the trajectories by which both birds and mammals became the largest-brained vertebrate classes.…”
Section: Resultssupporting
confidence: 89%
“…All five of the mammal groups with the largest brain size may have originated in the Neogene. This remarkable diversity in evolutionary trajectories and late attainment of peak relative brain size parallels patterns in birds in which the largest-brained taxa (parrots and corvids) attained large brain sizes during the Neogene via very different trajectories ( 12 ). These parallel patterns between birds and mammals suggest that, similar to the K-Pg transition, the Paleogene-Neogene transition may have created conditions ripe for ecological radiations and niche expansions that affected brain size evolution.…”
Section: Discussionmentioning
confidence: 66%
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“…Although several studies have investigated the ecological implications of interspecific variation in brain size (Corfield et al 2008;Maspons et al 2016;Sayol et al 2018;Ksepka et al 2020) and its potential role in speciation (Sol et al 2005a;Carlson et al 2011;Sayol et al 2019), relatively little is known about how brain shape varies between closely related species and how brain evolution might relate to speciation (but see Ryan 1986;Carlson et al 2011;Sayol et al 2019). This shortcoming is due, in part, to challenges of quantifying brain shape as opposed to brain size (measured by total volume or weight).…”
Section: Introductionmentioning
confidence: 99%