Acta Palaeontologica Polonica

2026/06/30 by Gareth J. Dyke, Norell · 8 voices · 43 citations
Earth and Planetary Sciences · Environmental Science · #Paleontology and Evolutionary Biology #Evolution and Paleontology Studies #Ichthyology and Marine Biology

paper · doi:10.4202/app

Abstract

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.<br/><br/>

Citations

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• The oldest African crocodylian: phylogeny, paleobiogeography, and differential survivorship of marine reptiles through the Cretaceous-Tertiary boundary
• Turtle remains from the Wadi Milk Formation (Upper Cretaceous) of Northern Sudan
• New data on the diversity and abundance of small-bodied ornithopods (Dinosauria, Ornithischia) from the Belly River Group (Campanian) of Alberta
• First record ofHyposaurus(Dyrosauridae, Crocodyliformes) from the Upper Cretaceous Shendi Formation of Sudan
• Cranial ornamentation and ontogenetic status ofHomalocephale calathocercos(Ornithischia: Pachycephalosauria) from the Nemegt Formation, Mongolia
• Description and revised diagnosis of Asia’s first recorded pachycephalosaurid, Sinocephale bexelli gen. nov., from the Upper Cretaceous of Inner Mongolia, China
• A juvenileParasaurolophus(Ornithischia: Hadrosauridae) Braincase from Dinosaur Provincial Park, Alberta, with comments on crest ontogeny in the genus
• The Mongolian Late CretaceousAsiatherium, and the early phylogeny and paleobiogeography of Metatheria
• Skull of a New Mesonychid (Mammalia, Mesonychia) from the Late Paleocene of China
• New Miocene Caribbean gavialoids and patterns of longirostry in crocodylians
• Early Cambrian “Soft-Shelled” Brachiopods as Possible Stem-Group Phoronids
• Nuchal ligament reconstructions in diplodocid sauropods support horizontal neck feeding postures
• The evolution of vertebral pneumaticity in sauropod dinosaurs
• A re-evaluation ofBrachiosaurus altithoraxRiggs 1903 (Dinosauria, Sauropoda) and its generic separation fromGiraffatitan brancai(Janensch 1914)
• Konservat-Lagerstätte Menat [wikipedia]
• Lincoln Creek Formation [wikipedia]
• Ostenocaris [wikipedia]
• Oymurania [wikipedia]
• Pachydectes [wikipedia]
• Palaeacanthaspis [wikipedia]
• Plesiosuchus [wikipedia]
• Procardium [wikipedia]
• Pterodaustro [wikipedia]
• Ravjaa [wikipedia]
• Saurocephalus [wikipedia]
• Spermophilus citelloides [wikipedia]
• Williams Fork Formation [wikipedia]
• Reassessment of the evidence for postcranial skeletal pneumaticity in Triassic archosaurs, and the early evolution of the avian respiratory system. [europepmc]
• Morphology and function in the Cambrian Burgess Shale megacheiran arthropod Leanchoilia superlata and the application of a descriptive matrix. [europepmc]
• Diversification of rhacophorid frogs provides evidence for accelerated faunal exchange between India and Eurasia during the Oligocene. [europepmc]
• Pulmonary anatomy in the Nile crocodile and the evolution of unidirectional airflow in Archosauria. [europepmc]
• Adaptive radiation of chemosymbiotic deep-sea mussels. [europepmc]
• Integration of molecules and new fossils supports a Triassic origin for Lepidosauria (lizards, snakes, and tuatara). [europepmc]
• Early Triassic marine biotic recovery: the predators' perspective. [europepmc]
• Three-dimensional reconstruction and the phylogeny of extinct chelicerate orders. [europepmc]
• A specimen-level phylogenetic analysis and taxonomic revision of Diplodocidae (Dinosauria, Sauropoda). [europepmc]
• Musculoskeletal modelling of an ostrich (Struthio camelus) pelvic limb: influence of limb orientation on muscular capacity during locomotion. [europepmc]
• Evolution of the vertebrate skeleton: morphology, embryology, and development. [europepmc]
• Palaeoneurological clues to the evolution of defining mammalian soft tissue traits. [europepmc]
• The phylogenetic relationships of basal archosauromorphs, with an emphasis on the systematics of proterosuchian archosauriforms. [europepmc]
• The Snake with the Scorpion's Sting: Novel Three-Finger Toxin Sodium Channel Activators from the Venom of the Long-Glanded Blue Coral Snake (Calliophis bivirgatus). [europepmc]
• Genetic defects in β-spectrin and tau sensitize C. elegans axons to movement-induced damage via torque-tension coupling. [europepmc]
• A new giant titanosaur sheds light on body mass evolution among sauropod dinosaurs. [europepmc]
• ROM mapping of ligamentous constraints on avian hip mobility: implications for extinct ornithodirans. [europepmc]
• The Axon-Myelin Unit in Development and Degenerative Disease. [europepmc]
• Current Perspectives on Tooth Implantation, Attachment, and Replacement in Amniota. [europepmc]
• Phylogeny of Paleozoic limbed vertebrates reassessed through revision and expansion of the largest published relevant data matrix. [europepmc]
• An integrative phylogenomic approach illuminates the evolutionary history of cockroaches and termites (Blattodea). [europepmc]
• Axon death signalling in Wallerian degeneration among species and in disease. [europepmc]
• Using the Fossil Record to Evaluate Timetree Timescales. [europepmc]
• Pervasive duplication of tumor suppressors in Afrotherians during the evolution of large bodies and reduced cancer risk. [europepmc]
• Constructive Neutral Evolution 20 Years Later. [europepmc]
• Alvania rupeliensis [wikipedia]
• Coelogaster [wikipedia]
• Dulduityn Danzanravjaa [wikipedia]
• Dussumieriidae [wikipedia]
• Indobatrachus [wikipedia]

Discussions

• Egypt’s First Pterosaur Fossil Adds Wings to the World of Spinosaurus MUVP reports the first confirmed pterosaur fossil from Egypt: a >95-million-year-old wing bone from Bahariya Oasis, with an esti [bsky, 65 points, 3 comments]
• 🪱 New research alert from the BITE workshop! Paula Dentzien-Dias & colleagues discovered tapeworm eggs in Permian coprolites (fossilized poop), shedding new light on prehistoric parasites. #OpenAcces [bsky, 10 points, 0 comments]
• Potin et al. - A new giant nektobenthic radiodont benthivore from the Early Ordovician Fezouata Biota in Morocco doi.org/10.4202/app.... [bsky, 8 points, 0 comments]
• #NewSpecies New lower #jurassic #ichthyosaur from #portugal just came in: Gadusaurus aqualigneus Treatment: treatment.plazi.org/id/039B87C4-... Publication: doi.org/10.4202/app.... #APP #GadusaurusA [bsky, 6 points, 0 comments]
• Publication | Mandocaris polyphaga, la crevette gloutonne de La Voulte-sur-Rhône (Ardèche) Une nouvelle crevette caridé fossile de 165 Ma, avec organes et contenu stomacal exceptionnellement préservés [bsky, 4 points, 0 comments]
• Original article here: doi.org/10.4202/app.... [bsky, 3 points, 0 comments]
• Potin et al. (2025, 12月 December, Acta Palaeontologica Polonica)（オープンアクセス open access） 「モロッコのオルドビス紀前期のFezouata生物相からの，新たな巨大な遊泳底生性のラディオドンタ類の底生生物食者」 A new giant nektobenthic radiodont benthivore from the [bsky, 1 points, 1 comments]
• Shark parasites from the Permian! Nice new paper about ancient cestodes. doi.org/10.4202/app.... [bsky, 0 points, 1 comments]

Related

• Re-evaluation of the Haarlem Archaeopteryx and the radiation of maniraptoran theropod dinosaurs
• A Basal Alvarezsauroid Theropod from the Early Late Jurassic of Xinjiang, China
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• The ecology of Archaeopteryx