ArticleFrontiers in zoology2019
Assesment and interpretation of negative forelimb allometry in the evolution of non-avian Theropoda.
Article in Frontiers in zoology, 2019. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Cited by 5 papers.
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5 citing papers in PubMed.
- First forelimb reconstruction and range of motion assessment of the Late Cretaceous dinosaurPeerJ · 2026Article
- Dinosaur skull geometry does not follow functional optimization trends but facilitates adaptability.iScience · 2025Article
- Forelimb reduction and digit loss were evolutionarily decoupled in oviraptorosaurian theropod dinosaurs.Royal Society open science · 2025Article
- Shifts in growth, but not differentiation, foreshadow the formation of exaggerated forms under chicken domestication.Proceedings. Biological sciences · 2021Article
- A new two-fingered dinosaur sheds light on the radiation of Oviraptorosauria.Royal Society open science · 2020Article
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4 authors.
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Abstract
backgroundThe origin of birds is marked by a significant decrease in body size along with an increase in relative forelimb size. However, before the evolution of flight, both traits may have already been related: It has been proposed that an evolutionary trend of negative forelimb allometry existed in non-avian Theropoda, such that larger species often have relatively shorter forelimbs. Nevertheless, several exceptions exist, calling for rigorous phylogenetic statistical testing.
resultsHere, we re-assessed allometric patterns in the evolution of non-avian theropods, for the first time taking into account the non-independence among related species due to shared evolutionary history.We confirmed a main evolutionary trend of negative forelimb allometry for non-avian Theropoda, but also found support that some specific subclades (Coelophysoidea, Ornithomimosauria, and Oviraptorosauria) exhibit allometric trends that are closer to isometry, losing the ancestral negative forelimb allometry present in Theropoda as a whole.
conclusionsExplanations for negative forelimb allometry in the evolution of non-avian theropods have not been discussed, yet evolutionary allometric trends often reflect ontogenetic allometries, which suggests negative allometry of the forelimb in the ontogeny of most non-avian theropods. In modern birds, allometric growth of the limbs is related to locomotor and behavioral changes along ontogeny. After reviewing the evidence for such changes during the ontogeny of non-avian dinosaurs, we propose that proportionally longer arms of juveniles became adult traits in the small-sized and paedomorphic Aves.
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