ArticleProceedings. Biological sciences2022
The pre-eminent role of directional selection in generating extreme morphological change in glyptodonts (Cingulata; Xenarthra).
Article in Proceedings. Biological sciences, 2022. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Cited by 6 papers.
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6 citing papers in PubMed.
- Evolutionary Rate Incongruences in Squamates Reveal Contrasting Patterns of Evolutionary Novelties and Innovation.Systematic biology · 2026Article
- Is the human chin a spandrel? Insights from an evolutionary analysis of ape craniomandibular form.PloS one · 2026Article
- Evaluating the Accuracy of Methods for Detecting Correlated Rates of Molecular and Morphological Evolution.Systematic biology · 2023Article
- Successive climate crises in the deep past drove the early evolution and radiation of reptiles.Science advances · 2022Article
- Skull variation in Afro-Eurasian monkeys results from both adaptive and non-adaptive evolutionary processes.Scientific reports · 2022Article
- The pre-eminent role of directional selection in generating extreme morphological change in glyptodonts (Cingulata; Xenarthra).Proceedings. Biological sciences · 2022Article
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Abstract
The prevalence of stasis on macroevolution has been classically taken as evidence of the strong role of stabilizing selection in constraining morphological change. Rates of evolution calculated over longer timescales tend to fall below the expected under genetic drift, suggesting that directional selection signals are erased at longer timescales. Here, we investigated the rates of morphological evolution of the skull in a fossil lineage that underwent extreme morphological modification, the glyptodonts. Contrary to what was expected, we show here that directional selection was the primary process during the evolution of glyptodonts. Furthermore, the reconstruction of selection patterns shows that traits selected to generate a glyptodont morphology are markedly different from those operating on extant armadillos. Changes in both direction and magnitude of selection are probably tied to glyptodonts' invasion of a specialist-herbivore adaptive zone. These results suggest that directional selection might have played a more critical role in the evolution of extreme morphologies than previously imagined.
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