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Caudipteryx zoui
Cretaceous Omnivore

Caudipteryx

Caudipteryx zoui

"Tail feather (of Zou)"

Period
Cretaceous · Aptiano
Lived
125–124 Ma
Length
up to 0.9 m
Estimated weight
5 kg
Country of origin
China
Described in
1998 by Ji, Currie, Norell e Ji

About this species

Caudipteryx zoui is a small oviraptorosaurian theropod from the Early Cretaceous (basal Aptian, around 125 to 124 million years ago) Yixian Formation of western Liaoning, northeastern China. It was among the first known non-avian dinosaurs with unambiguous pennaceous feathers, preserved on the reduced wings and as a fan at the tip of the short tail. It measured about 75 to 90 cm long and weighed roughly 5 kg. The skull was short with a beak and only a few conical teeth restricted to the front of the upper jaw. Gastroliths preserved in the holotype's abdomen indicate at least partial herbivory. The wing and tail feathers were symmetrical and therefore unsuited for flight; they likely served for visual display and thermoregulation. The original description by Ji Qiang, Philip Currie, Mark Norell and Ji Shu'an in 1998 in Nature was one of the finds that consolidated the dinosaurian origin of birds.

Geological formation & environment

The Yixian Formation belongs to the Jehol Group (Early Cretaceous, basal Aptian) of western Liaoning, northeastern China. High-precision 40Ar/39Ar dates place it between about 125.76 and 124.12 million years ago. It comprises volcanic tuffs interbedded with lacustrine mudstones, with exceptional preservation of animals and plants in Konservat-Lagerstätten, such as the Jianshangou Member (Caudipteryx-bearing) and the Dawangzhangzi and Jingangshan Members. The fauna includes feathered theropods (Caudipteryx, Protarchaeopteryx, Sinosauropteryx, Microraptor, Sinornithosaurus, Yutyrannus), birds (Confuciusornis, Eoenantiornis), ceratopsians (Psittacosaurus), ankylosaurs, mammals (Repenomamus, Eomaia), pterosaurs and pioneer plants such as Archaefructus. The biota was periodically buried by explosive volcanic eruptions, which produced the exceptional three-dimensional preservation of the fossils.

Image gallery

Ecology and behavior

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Habitat

Large lake margins in a cool to temperate volcanic-sedimentary basin. The Yixian Formation was punctuated by pyroclastic eruptions that buried entire communities in ash, which explains the exceptional three-dimensional preservation. Vegetation was dominated by conifers (Araucariaceae, Pinaceae), bennettitaleans, cycads, ginkgoaleans and the earliest angiosperms (Archaefructus).

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Feeding

Mixed diet, omnivore trending herbivore: a beak with a toothless major portion, a few conical teeth only at the front of the upper jaw, and gastroliths in the stomach to grind plant material. Likely supplemented with insects and small vertebrates opportunistically (Zanno and Makovicky 2011).

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Behavior and senses

A small, agile cursor with a short, stiffened tail ending in a feather fan. The dominant interpretation (Persons, Currie and Norell 2014; Foth, Tischlinger and Rauhut 2014) is that the caudal fan and wing feathers functioned as a visual display structure in courtship or intraspecific signalling rather than for flight.

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Physiology and growth

Body covered in filamentous feathers with symmetrical remiges on the hands and symmetrical rectrices on the tail. The plumage is dominated by eumelanin (dark grey to black tones) according to Zhang et al. (2010). Preserved cell nuclei and chromatin in femoral cartilage (Zheng et al. 2021) suggest physiology comparable to theropods of intermediate metabolism, consistent with the thermoregulation implied by the feather cover.

Paleogeography

Continental configuration

Mapa paleogeográfico do Cretáceous (~90 Ma)

Ron Blakey · CC BY 3.0 · Cretáceous, ~90 Ma

During the Aptiano (~125–124 Ma), Caudipteryx zoui inhabited Laramidia, the western half of present-day North America, separated from the east by the Western Interior Seaway, a shallow sea dividing the continent. The continents were in very different positions: India was drifting toward Asia, Antarctica was still connected to Australia, and South America was an isolated island.

Bone Inventory

Estimated completeness 85%

The genus is known from multiple articulated, exceptionally preserved specimens (holotype NGMC 97-4-A, BPM 0001, IVPP V12430 and others) that together preserve nearly the entire skeleton, plus feathers, filamentous integument, gastroliths and melanosomes. It is one of the most completely known Mesozoic theropods worldwide.

Found (12)
Inferred (2)
Esqueleto de dinossauro — theropod
Wikimedia Commons CC BY 3.0

Found elements

crânio parcial com bico e dentes anterioresmandíbula com premaxilares dentados e dentários desdentadoscoluna cervical, dorsal, sacral e caudal quase completasgastrália completaambos os membros anteriores (úmero, rádio, ulna, mãos)ambas as escápulas e cinturas peitoraispelve completaambos os membros posteriores (fêmur, tíbia, fíbula, tarsos, metatarsos e falanges)penas pennáceas nas mãos e na ponta da cauda (remiges e rectrizes simétricas)filamentos penáceos ao longo do corpogastrólitos agrupados na região gástrica do holótipomelanossomos preservados em amostras tegumentares (Zhang et al. 2010)

Inferred elements

partes distais de algumas falangeselementos pequenos da cintura pélvica em indivíduos parciais

Scientific Literature

15 papers in chronological order — from the original description to recent research.

1924

Three new Theropoda, Protoceratops zone, central Mongolia

Osborn, H.F. · American Museum Novitates 144, 1-12

Original description of Oviraptor philoceratops (AMNH 6517), the holotype of Oviraptoridae and the first named oviraptorosaur. Sets the historical context in which Caudipteryx would later be recognised as a basal oviraptorosaur, 74 years afterwards. Osborn mistakenly assumed the animal ate ceratopsian eggs, an interpretation overturned in the 1990s by the discovery of oviraptorid nests in Mongolia.

Reconstruction of Oviraptor philoceratops, the type oviraptorosaur described by Osborn in 1924, the family in which Caudipteryx is nested as a basal member by modern phylogenetic analyses.

Reconstruction of Oviraptor philoceratops, the type oviraptorosaur described by Osborn in 1924, the family in which Caudipteryx is nested as a basal member by modern phylogenetic analyses.

Original drawing by Osborn (1924) of the Oviraptor skeleton. This historical description establishes the group in which Caudipteryx would be classified as a basal member in 1998.

Original drawing by Osborn (1924) of the Oviraptor skeleton. This historical description establishes the group in which Caudipteryx would be classified as a basal member in 1998.

1998

Two feathered dinosaurs from northeastern China

Ji, Q., Currie, P.J., Norell, M.A. e Ji, S. · Nature 393(6687), 753-761

Original description of Caudipteryx zoui (holotype NGMC 97-4-A) and Protarchaeopteryx robusta from Sihetun, Liaoning. The authors document symmetrical pennaceous feathers on the reduced wings and tail tip, demonstrating that modern-type feathers existed in non-avian theropods and consolidating the dinosaurian origin of birds.

Caudipteryx zoui specimen from the Yixian Formation, Liaoning, morphologically equivalent to holotype NGMC 97-4-A described by Ji, Currie, Norell and Ji (1998, Nature).

Caudipteryx zoui specimen from the Yixian Formation, Liaoning, morphologically equivalent to holotype NGMC 97-4-A described by Ji, Currie, Norell and Ji (1998, Nature).

Caudipteryx holotype on display at the Geological Museum of China, Beijing. The specimen is the basis of the original Nature description (Ji et al. 1998).

Caudipteryx holotype on display at the Geological Museum of China, Beijing. The specimen is the basis of the original Nature description (Ji et al. 1998).

2000

Important features of Caudipteryx: evidence from two nearly complete new specimens

Zhou, Z., Wang, X., Zhang, F. e Xu, X. · Vertebrata PalAsiatica 38(4), 241-254

Description of two nearly complete new specimens referred to Caudipteryx (BPM 0001 and IVPP V12430), with complete skulls and feather impressions. Confirms the taxon's phylogenetic position as a basal oviraptorosaur and expands the cranial and manus anatomy, including the beak morphology with restricted anterior teeth.

Referred Caudipteryx zoui specimen with preserved skull and feathers, similar to the two new specimens described by Zhou et al. (2000).

Referred Caudipteryx zoui specimen with preserved skull and feathers, similar to the two new specimens described by Zhou et al. (2000).

General view of the articulated Caudipteryx skeleton, whose cranial and manual anatomy was detailed by Zhou et al. (2000) in Vertebrata PalAsiatica.

General view of the articulated Caudipteryx skeleton, whose cranial and manual anatomy was detailed by Zhou et al. (2000) in Vertebrata PalAsiatica.

2000

A new species of Caudipteryx from the Yixian Formation of Liaoning, northeast China

Zhou, Z. e Wang, X. · Vertebrata PalAsiatica 38(2), 113-130

Description of a second species of the genus, Caudipteryx dongi, also from the Yixian Formation. Discusses limb proportion differences and implications for intrageneric variation, establishing the genus as one of the best-sampled oviraptorosaurs of the Jehol Biota.

Fossil specimen of Caudipteryx from the Yixian Formation, the preservation style that underpins Zhou and Wang's (2000) description of Caudipteryx dongi.

Fossil specimen of Caudipteryx from the Yixian Formation, the preservation style that underpins Zhou and Wang's (2000) description of Caudipteryx dongi.

Fossil slab of Caudipteryx zoui. Zhou and Wang (2000) distinguish C. dongi from C. zoui by limb and tail proportions.

Fossil slab of Caudipteryx zoui. Zhou and Wang (2000) distinguish C. dongi from C. zoui by limb and tail proportions.

2002

Bristle-like integumentary structures at the tail of the horned dinosaur Psittacosaurus

Mayr, G., Peters, D.S., Plodowski, G. e Vogel, O. · Naturwissenschaften 89(8), 361-365

Frames the diversity of integumentary structures across Jehol dinosaurs, comparing Psittacosaurus filaments with the feathers of Caudipteryx, Sinosauropteryx and Protarchaeopteryx. Demonstrates that feather-like and filamentous structures were broadly distributed in Dinosauria, not restricted to Theropoda.

Psittacosaurus SMF R 4970, the specimen with caudal filaments discussed by Mayr et al. (2002). The contrast with Caudipteryx feathers illustrates the diversity of Jehol integument.

Psittacosaurus SMF R 4970, the specimen with caudal filaments discussed by Mayr et al. (2002). The contrast with Caudipteryx feathers illustrates the diversity of Jehol integument.

Symmetrical pennaceous wing feathers of Caudipteryx. Mayr et al. (2002) compare their morphology with Psittacosaurus filaments and other Jehol dinosaurs.

Symmetrical pennaceous wing feathers of Caudipteryx. Mayr et al. (2002) compare their morphology with Psittacosaurus filaments and other Jehol dinosaurs.

2005

Caudipteryx as a non-avian theropod rather than a flightless bird

Dyke, G.J. e Norell, M.A. · Acta Palaeontologica Polonica 50(1), 101-116

Mathematical reanalysis of body proportions arguing that Caudipteryx is a non-avian theropod, rejecting Jones et al.'s (2000) hypothesis that it was a flightless bird. Restores the taxon's consensus phylogenetic position within Oviraptorosauria.

Life reconstruction of Caudipteryx. Dyke and Norell's (2005) analysis confirms the taxon is a non-avian theropod nested within Oviraptorosauria.

Life reconstruction of Caudipteryx. Dyke and Norell's (2005) analysis confirms the taxon is a non-avian theropod nested within Oviraptorosauria.

Size comparison of Caudipteryx with an adult human, showing the small stature (72 to 89 cm) of the theropod whose phylogenetic identity was revised by Dyke and Norell (2005).

Size comparison of Caudipteryx with an adult human, showing the small stature (72 to 89 cm) of the theropod whose phylogenetic identity was revised by Dyke and Norell (2005).

2009

New insights into the brain, braincase, and ear region of tyrannosaurs, with implications for sensory organization and behavior

Witmer, L.M. e Ridgely, R.C. · The Anatomical Record 292(9), 1266-1296

Reference study on comparative theropod neuroanatomy using CT scanning. Although focused on tyrannosauroids, it establishes the methodological framework later applied to oviraptorosaurs such as Caudipteryx and Conchoraptor, enabling 3D reconstruction of the brain and inner ear in feathered theropods.

Skull of Tyrannosaurus rex (AMNH 5027). Witmer and Ridgely (2009) used CT scans of material of this type to develop the brain reconstruction method later applied to oviraptorosaurs such as Caudipteryx.

Skull of Tyrannosaurus rex (AMNH 5027). Witmer and Ridgely (2009) used CT scans of material of this type to develop the brain reconstruction method later applied to oviraptorosaurs such as Caudipteryx.

Caudipteryx STM4-3 from the Shandong collection. Specimens of this type enable neuroanatomical analyses comparable with those proposed by Witmer and Ridgely (2009) for tyrannosauroids.

Caudipteryx STM4-3 from the Shandong collection. Specimens of this type enable neuroanatomical analyses comparable with those proposed by Witmer and Ridgely (2009) for tyrannosauroids.

2010

Fossilized melanosomes and the colour of Cretaceous dinosaurs and birds

Zhang, F., Kearns, S.L., Orr, P.J., Benton, M.J., Zhou, Z., Johnson, D., Xu, X. e Wang, X. · Nature 463(7284), 1075-1078

Demonstrates that fossilised melanosomes allow colour inference in Cretaceous dinosaurs and birds. Includes analysis of Confuciusornis and Sinosauropteryx filaments; establishes the methodological protocol that later enabled Caudipteryx colour reconstruction (eumelanin in dark grey and black tones) and inaugurates the era of palaeocolour.

Sinosauropteryx prima, whose filaments were analysed by Zhang et al. (2010). The same method applied to Caudipteryx reveals eumelanin-dominated plumage (dark grey to black).

Sinosauropteryx prima, whose filaments were analysed by Zhang et al. (2010). The same method applied to Caudipteryx reveals eumelanin-dominated plumage (dark grey to black).

Confuciusornis sanctus from the same Sihetun quarry that yielded Caudipteryx. Zhang et al. (2010) analysed melanosomes in both to infer Cretaceous colours.

Confuciusornis sanctus from the same Sihetun quarry that yielded Caudipteryx. Zhang et al. (2010) analysed melanosomes in both to infer Cretaceous colours.

2010

Plumage color patterns of an extinct dinosaur

Li, Q., Gao, K.-Q., Vinther, J., Shawkey, M.D., Clarke, J.A., D'Alba, L., Meng, Q., Briggs, D.E.G. e Prum, R.O. · Science 327(5971), 1369-1372

First full reconstruction of the plumage of a non-avian dinosaur, Anchiornis huxleyi, based on 29 melanosome samples. Contemporary with colour studies on Caudipteryx and Sinosauropteryx, it consolidates the Jehol fauna as a natural laboratory for palaeocolour in feathered oviraptorosaurs such as Caudipteryx.

Anchiornis huxleyi reconstructed from the melanosomes analysed by Li et al. (2010). The same method is used to infer Caudipteryx colour.

Anchiornis huxleyi reconstructed from the melanosomes analysed by Li et al. (2010). The same method is used to infer Caudipteryx colour.

Protarchaeopteryx robusta, basal oviraptorosaur from the Yixian used as close relative for anatomical comparisons.

Protarchaeopteryx robusta, basal oviraptorosaur from the Yixian used as close relative for anatomical comparisons.

2010

Exceptional dinosaur fossils show ontogenetic development of early feathers

Xu, X., Zheng, X. e You, H. · Nature 464(7293), 1338-1341

Study of two subadult specimens of Similicaudipteryx, a caudipterid close to Caudipteryx, showing tail feathers in moult. Discusses the evolution of symmetrical feathers in caudipterids and feather ontogeny in oviraptorosaurs, directly applicable to the interpretation of Caudipteryx feathers. Prum's (2010) reply interprets the proximally ribbon-like pennaceous feathers as developing pin feathers in active moult.

Similicaudipteryx yixianensis, more derived caudipterid, provides evolutionary context for Caudipteryx.

Similicaudipteryx yixianensis, more derived caudipterid, provides evolutionary context for Caudipteryx.

Sinosauropteryx prima, first Jehol dinosaur with preserved filaments, reference for plumage studies.

Sinosauropteryx prima, first Jehol dinosaur with preserved filaments, reference for plumage studies.

Figure 1: Feathers of two Similicaudipteryx specimens.

Figure 1: Feathers of two Similicaudipteryx specimens.

Figure 2: Elongate broad filamentous feathers in selected non-avian theropods.

Figure 2: Elongate broad filamentous feathers in selected non-avian theropods.

Figure 3: Known feather morphotypes across a simplified dinosaurian phylogeny.

Figure 3: Known feather morphotypes across a simplified dinosaurian phylogeny.

2011

Herbivorous ecomorphology and specialization patterns in theropod dinosaur evolution

Zanno, L.E. e Makovicky, P.J. · PNAS 108(1), 232-237

Analysis of 21 morphological characters correlated with direct evidence of herbivory in coelurosaurian theropods. Identifies Oviraptorosauria, including Caudipteryx, as one of six clades with clear morphological evidence of herbivorous or omnivorous diet. Rebuts the classical view of theropods as hypercarnivores.

Gastroliths preserved in the abdomen of Caudipteryx zoui (BPV 085). Direct evidence of this type is part of the dataset Zanno and Makovicky (2011) used to characterise herbivory in oviraptorosaurs.

Gastroliths preserved in the abdomen of Caudipteryx zoui (BPV 085). Direct evidence of this type is part of the dataset Zanno and Makovicky (2011) used to characterise herbivory in oviraptorosaurs.

Mounted Caudipteryx skeleton at the Field Museum (Chicago), with proportions and a short beak consistent with the herbivorous ecomorphology described by Zanno and Makovicky (2011).

Mounted Caudipteryx skeleton at the Field Museum (Chicago), with proportions and a short beak consistent with the herbivorous ecomorphology described by Zanno and Makovicky (2011).

2014

Oviraptorosaur tail forms and functions

Persons, W.S., Currie, P.J. e Norell, M.A. · Acta Palaeontologica Polonica 59(3), 553-567

3D reconstruction of oviraptorosaur tail musculature, including Caudipteryx, Khaan, Ingenia and Nomingia. Proposes that the shortened, stiffened tail with its retrice fan functioned as a dynamic intraspecific display structure, adapted to courtship and signalling rather than flight. Direct scientific basis for the reasoning popularised in documentaries about oviraptorosaur tails.

Life reconstruction of Sinosauropteryx with coloration pattern inferred from melanosomes.

Life reconstruction of Sinosauropteryx with coloration pattern inferred from melanosomes.

General view of a mounted Caudipteryx skeleton with the short tail. Persons et al. (2014) conclude that caudal musculature remained robust despite shortening, consistent with a display function.

General view of a mounted Caudipteryx skeleton with the short tail. Persons et al. (2014) conclude that caudal musculature remained robust despite shortening, consistent with a display function.

2013

Evolutionary origins of the avian brain

Balanoff, A.M., Bever, G.S., Rowe, T.B. e Norell, M.A. · Nature 501(7465), 93-96

Comparative CT scans of brains in living birds, Archaeopteryx and non-avian maniraptorans, including oviraptorosaurs close to Caudipteryx. Concludes that bird-like encephalisation evolved multiple times in maniraptoran theropods before the origin of flight, placing Caudipteryx and other oviraptorosaurs on the same neuroanatomical continuum as basal birds.

Archaeopteryx Berlin specimen, central to Balanoff et al.'s (2013) reconstruction and a comparison point for the endocasts of oviraptorosaurs such as Caudipteryx.

Archaeopteryx Berlin specimen, central to Balanoff et al.'s (2013) reconstruction and a comparison point for the endocasts of oviraptorosaurs such as Caudipteryx.

Yutyrannus huali, giant feathered tyrannosauroid from the same Jehol biota, taphonomic context for Caudipteryx.

Yutyrannus huali, giant feathered tyrannosauroid from the same Jehol biota, taphonomic context for Caudipteryx.

Figure 1: Coelurosaur phylogeny and partitioned endocranial casts.

Figure 1: Coelurosaur phylogeny and partitioned endocranial casts.

Figure 2: Bivariate plots of log-transformed body-mass data.

Figure 2: Bivariate plots of log-transformed body-mass data.

Figure 3: Bivariate plots of log-transformed total-endocranial-volume data.

Figure 3: Bivariate plots of log-transformed total-endocranial-volume data.

Figure 4: Principal components analysis plot of neuroanatomical region volumes.

Figure 4: Principal components analysis plot of neuroanatomical region volumes.

2014

New specimen of Archaeopteryx provides insights into the evolution of pennaceous feathers

Foth, C., Tischlinger, H. e Rauhut, O.W.M. · Nature 511(7507), 79-82

Description of the eleventh Archaeopteryx specimen, with preserved body and hindlimb feathers. Proposes that pennaceous feathers evolved under display selection before serving flight, a hypothesis directly supported by the symmetrical tail and wing feathers of Caudipteryx, which were also ornamental rather than aerodynamic.

Eleventh Archaeopteryx specimen analysed by Foth, Tischlinger and Rauhut (2014). The pennaceous feather distribution is consistent with the pattern seen in Caudipteryx.

Eleventh Archaeopteryx specimen analysed by Foth, Tischlinger and Rauhut (2014). The pennaceous feather distribution is consistent with the pattern seen in Caudipteryx.

Fossil of Confuciusornis sanctus, archaic bird from the same Yixian Formation where Caudipteryx was preserved.

Fossil of Confuciusornis sanctus, archaic bird from the same Yixian Formation where Caudipteryx was preserved.

2021

Nuclear preservation in the cartilage of the Jehol dinosaur Caudipteryx

Zheng, X., Bailleul, A.M., Li, Z., Wang, X. e Zhou, Z. · Communications Biology 4, 1125

Report of chondrocytes preserved with nuclei and chromatin fragments in the femoral cartilage of a Caudipteryx STM4-3 from the Jehol Biota. Second-ever record of fossil chromatin in a vertebrate and a highlight of theropod molecular palaeontology, supporting the view that cartilage is a privileged tissue for nuclear preservation in deep time.

Microraptor gui, feathered dromaeosaurid from the Jehol, context for reproductive and medullary studies in female theropods.

Microraptor gui, feathered dromaeosaurid from the Jehol, context for reproductive and medullary studies in female theropods.

Incisivosaurus gauthieri, basal oviraptorosaur with incisive dentition, anatomical contrast for Caudipteryx.

Incisivosaurus gauthieri, basal oviraptorosaur with incisive dentition, anatomical contrast for Caudipteryx.

Fig. 1: Photograph and line drawing of Caudipteryx STM4-3.

Fig. 1: Photograph and line drawing of Caudipteryx STM4-3.

Fig. 2: Photographs of a fragment of the articular cartilage of STM4-3 seen with multiple microscopy methods.

Fig. 2: Photographs of a fragment of the articular cartilage of STM4-3 seen with multiple microscopy methods.

Fig. 3: Photographs of unstained paraffin sections and SEM images of the demineralized cartilage of STM4-3.

Fig. 3: Photographs of unstained paraffin sections and SEM images of the demineralized cartilage of STM4-3.

Fig. 4: Photographs of H&E stained paraffin sections of the cartilage of STM4-3 and that of an extant chicken.

Fig. 4: Photographs of H&E stained paraffin sections of the cartilage of STM4-3 and that of an extant chicken.

Famous museum specimens

NGMC 97-4-A (holótipo) — Geological Museum of China, Pequim

Wikimedia Commons

NGMC 97-4-A (holótipo)

Geological Museum of China, Pequim

Completeness: Crânio parcial, esqueleto pós-craniano quase completo, penas pennáceas preservadas na ponta da cauda e nas mãos, além de gastrólitos (cerca de 85% do esqueleto)
Found in: 1997
By: Agricultores de Sihetun, Beipiao; estudado por Ji Qiang e colaboradores

Holotype described by Ji, Currie, Norell and Ji in 1998 in Nature. One of the first non-avian dinosaurs with unambiguous pennaceous feathers, a milestone confirming that feathers predate the origin of birds.

IVPP V12430 (referido) — Institute of Vertebrate Paleontology and Paleoanthropology (IVPP), Pequim

Wikimedia Commons

IVPP V12430 (referido)

Institute of Vertebrate Paleontology and Paleoanthropology (IVPP), Pequim

Completeness: Esqueleto articulado quase completo com crânio e penas preservadas, incluindo propatágio com impressões de penas
Found in: 1998
By: Coleção IVPP em Sihetun, Liaoning

Second specimen referred to Caudipteryx, described by Zhou and colleagues in 2000. Preserves a propatagium with feather impressions and supports the interpretation of Caudipteryx as a basal herbivorous oviraptorosaur.

STM4-3 (referido) — Shandong Tianyu Museum of Nature, Pingyi, China

Wikimedia Commons

STM4-3 (referido)

Shandong Tianyu Museum of Nature, Pingyi, China

Completeness: Esqueleto articulado com cartilagem femoral preservando condrócitos e núcleos celulares
Found in: 2010
By: Coleção STM, Liaoning e Shandong

Specimen that provided cartilage for Zheng et al.'s (2021, Communications Biology) molecular analysis, which identified preserved nuclei and chromatin, only the second such record in any vertebrate.

In cinema and popular culture

Caudipteryx has documented appearances in documentaries about feathered dinosaurs, owing to its central role in confirming the dinosaur-bird transition. It appears in Planet Dinosaur (BBC, 2011), specifically in the feathered-dinosaurs episode, alongside Sinosauropteryx and Gigantoraptor. It has no confirmed appearances in the original Walking with Dinosaurs (BBC, 1999), in Dinosaur Revolution (Discovery, 2011) or in Prehistoric Planet (Apple TV+, 2022 to 2025), which cover different faunas or periods. Despite its scientific fame, its presence in popular media is smaller than that of other Jehol dinosaurs such as Microraptor and Yutyrannus.

Animatrônico do T-rex da franquia Jurassic Park com o Jeep característico da série

Full-size T-rex animatronic from the Jurassic Park franchise, with the iconic red Jeep — Amaury Laporte · CC BY 2.0

2011 📹 Planet Dinosaur

Classification

Dinosauria
└ Saurischia
└ Theropoda
└ Coelurosauria
└ Maniraptora
└ Oviraptorosauria
└ Caudipteridae

Discovery

First fossil
1997
Discoverer
Coletado por agricultores locais em Sihetun, Beipiao; estudado por Ji Qiang (National Geological Museum of China), Philip J. Currie (Royal Tyrrell Museum), Mark A. Norell (AMNH) e Ji Shu'an
Formal description
1998
Described by
Ji, Currie, Norell e Ji
Formation
Formação Yixian (Membro Jianshangou), Biota Jehol
Region
Liaoning (Sihetun, Beipiao)
Country
China
Osborn, H.F. (1924) — American Museum Novitates 144, 1-12

Fun fact

The name Caudipteryx literally means 'tail feather' and describes the fan of symmetrical pennaceous feathers preserved at the tip of the animal's tail. Although these feathers could not serve flight, being symmetrical and short, they likely acted as a visual display billboard for courtship, a peacock fan from 125 million years ago. Caudipteryx is also one of the very few dinosaurs whose cell nuclei and chromatin fragments have been preserved (Zheng et al. 2021), making it one of the most promising targets of molecular palaeontology.