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Acta Palaeontologica Polonica

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However, it has also been proposed that both the relative proportions of the hind limb bones (when compared with overall leg length), and the position of the center of mass in Caudipteryx are more similar to those seen in extant cusorial birds than they are to other non-avialan theropod dinosaurs.

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Caudipteryx zoui is a small enigmatic theropod known from the Early Cretaceous Yixian Formation of the People's Republic of China.

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Caudipteryx zoui is a small enigmatic theropod known from the Early Cretaceous Yixian Formation of the People's Republic of China. From the time of its initial description, this taxon has stimulated a great deal of ongoing debate regarding the phylogenetic relationship between non-avialan theropods and birds (Avialae) because it preserves structures that have been uncontroversially accepted as feathers (albeit aerodynamically unsuitable for flight). However, it has also been proposed that both the relative proportions of the hind limb bones (when compared with overall leg length), and the position of the center of mass in Caudipteryx are more similar to those seen in extant cusorial birds than they are to other non-avialan theropod dinosaurs. This conclusion has been used to imply that Caudipteryx may not have been correctly interpreted as a feathered non-avialan theropod, but instead that this taxon represents some kind of flightless bird. We review the evidence for this claim at the level of both the included fossil specimen data, and in terms of the validity of the results presented. There is no reason-phylogenetic, morphometric or otherwise-to conclude that Caudipteryx is anything other than a small non-avialan theropod dinosaur.

Kategoria: przyroda

Rodzina: zwierzeta

Jakość źródła: 50/100

Próby weryfikacji: 3

Notatka fact-checku: Fact-check 3.0-content-aware: no sufficient claim-bound corroboration after 3 healthy attempts. Scope=verify the factual claim. Required independent sources=2; stored evidence groups=1. Provider/API errors did not consume attempts. | Fact-check 4.3.2: research wznowiony bez zdejmowania HOLD. Poprzednia metoda: factcheck-300-content-aware. | Fact-check 4.3.2: research wznowiony bez zdejmowania HOLD. Poprzednia metoda: factcheck-weekly-research-432.

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OpenAlex / Acta Palaeontologica PolonicaPOTWIERDZAniezależne

Evidence: 94 • authority: 90

Acta Palaeontologica Polonica. Caudipteryx zoui is a small enigmatic theropod known from the Early Cretaceous Yixian Formation of the People's Republic of China. From the time of its initial description, this taxon has stimulated a great deal of ongoing debate regarding the phylogenetic relationship between non-avialan theropods and birds (Avialae) because it preserves structures that have been uncontroversially accepted as feathers (albeit aerodynamically unsuitable for flight). However, it has also been proposed that both the relative proportions of the hind limb bones (when compared with overall leg length), and the position of the center of mass in Caudipteryx are more similar to those…

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Fort Hays State Universitypomocniczeniezależne

Evidence: 68 • authority: 88

Hind Limb and Pelvis Proportions of Hesperornis Regalis: A Comparison with Extant Diving Birds. Hesperornis regalis and other hesperornithiforms have long been compared to extant grebes or loons in terms of their ecology, mode of locomotion, and hind limb morphology. However, no quantitative analysis has previously been published to assess the accuracy of this morphological comparison. Ratio, multivariate, and average Euclidean distance analyses of five modern species of fool-propelled diver, including one loon and two grebes, indicate that the Common Loon, Gavia immer, is significantly similar to Hesperornis regalis, H. gracilis, and Parahesperornis alexi in terms of hind limb bone-length…

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PeerJpomocniczeniezależne

Evidence: 37 • authority: 80

Figure 2: Visualisation of estimates of limb length of the forelimb (A) and the hind limb (B), as well as limb bone proportions in a ternary plot (C).

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The Royal Societypomocniczeniezależne

Evidence: 34 • authority: 80

Review for "Great expectations: altricial developmental strategies are associated with more flexible evolution of limb skeleton proportions in birds"

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PeerJpomocniczeniezależne

Evidence: 34 • authority: 80

Figure 4: Ternary plots illustrating the limb bone proportions in chicken (red datapoints), mallard duck (blue datapoints) and Muscovy duck (green datapoints) in the forelimb (A) and the hind limb (B).

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