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1
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A Lujiatun-like dinosaurian assemblage from the Jehol Biota of Ningcheng, Inner Mongolia, Northeast China

100%
Zhang H., Yu D., Feng Y., Pei R., Zhou C.-F.
Acta Palaeontologica Polonica
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2022
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tom 67
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nr 3
2
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Caudipteryx as a non-avalian theropod rather than a flightless bird

100%
Dyke G. J., Norell M. A.
Acta Palaeontologica Polonica
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2005
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tom 50
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nr 1
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.
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New material of the trechnotherian mammal Lactodens from the Early Cretaceous Jehol Biota: Comparison with Origolestes and implications for mammal evolution

80%
Mao F., Liu C., Meng J.
Acta Palaeontologica Polonica
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2022
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tom 67
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nr 1
4

A new Mesozoic species of soft-bodied plant beetle (Coleoptera: Dascillidae) from the Early Cretaceous of Inner Mongolia, China with a review of fossil Dascillidae

80%
Jin Z., Slipinski A., Pang H., Ren D.
Annales Zoologici
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2013
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tom 63
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nr 3
A new genus, Cretodascillus gen. nov. in the family Dascillidae with a new species C. sinensis sp. nov., is described from the Early Cretaceous Yixian Formation of Inner Mongolia, China. The fossil taxa described in Dascillidae have been critically reviewed and the Upper Triassic Apheloodes Dunstan, 1923 (type species A. obliquum Dunstan, 1923) and Leioodes Dunstan, 1923 (type species L. planum Dunstan, 1923) are removed from Dascillidae to Coleoptera incertae sedis, the Miocene Protoacnaeus Wickham, 1914 (type species P. tenuicomis Wickham, 1914) is transferred to Psephenidae and Miocyphon Wickham, 1914 (type species M. punctulatus Wickham, 1914) to Scirtidae.
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Cranial anatomy of the iguanodontoid ornithopod Jinzhousaurus yangi from the Lower Cretaceous Yixian Formation of China

80%
Barrett P. M., Butler R. J., Xiao-Lin W., Xing X.
Acta Palaeontologica Polonica
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2009
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tom 54
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nr 1
35-48
The Yixian Formation (Lower Cretaceous) of Liaoning Province, China, is justifiably famous for its exceptionally preserved fauna, which includes a remarkable diversity of non−avian dinosaurs. Here, we provide the first detailed description of the cranial skeleton of the iguanodontian ornithopod Jinzhousaurus yangi. Many previously unrecorded features have been recognised, permitting a new and more robust diagnosis for this taxon, which is based on a suite of autapomorphic features. Jinzhousaurus and an unnamed sauropod represent the largest, but some of the least abundant, animals in the Jehol Biota, a situation that contrasts with many other Lower Cretaceous faunas in which large dinosaurs are common faunal components. This rarity may be due to either palaeoenvironmental constraints or taphonomic bias, although it is not possible to choose between these alternatives on the basis of current data.
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A new Chinese Mesozoic stick insect

80%
Nel A., Delfosse E.
Acta Palaeontologica Polonica
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2011
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tom 56
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nr 2
Renphasma sinica gen. et sp. nov. is described from the Early Cretaceous Yixian Formation in Liaoning. It has the general habitus of the Mesozoic “stick−insects”, with a short thorax, and broad and long tegmina, as long as the hindwings. Its pattern of tegmina venation is typical of the Mesozoic Phasmatodea, also present in the Eocene stick insect family Gallophasmatidae, viz. archaeorthopteran organisation of median and cubital veins. On the other side it has a vomer typical of modern Phasmatodea, both supporting the hypothesis that the Mesozoic, Cainozoic, and modern stick insects belong to the same clade. The pattern of dark and hyaline spots on the wings of Renphasma is probably related to mimicry with plants.
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A new cupedid genus (Coleoptera: Archostemata: Cupedidae) from Jehol Biota of western Liaoning, China

80%
Ren D., Tan J.
Annales Zoologici
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2006
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tom 56
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nr 3
A new genus including two new species of fossil cupedids, Latocupes fortis gen. and sp. nov. and L. bellus gen. and sp. nov., is described from the Yixian Formation of western Liaoning Province, China and assigned to family Cupedidae. A brief morphological analysis shows that the new genus might be sister group of extant genus Priacma.
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New psittacosaurid highlights skull enlargement in horned dinosaurs

80%
Sereno P. C., Xijin Z., Brown L., Lin T.
Acta Palaeontologica Polonica
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2007
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tom 52
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nr 2
A new psittacosaurid is based on a nearly complete articulated skeleton from northeastern China that differs principally in skull size as compared to the most common and widespread species, Psittacosaurus mongoliensis. The skull of Psittacosaurus majorsp. nov., is 25% larger despite very similar postcranial skeletal dimensions. Such selective skull enlargement is very unusual. Skull size in ceratopsians, in general, scales with positive allometry relative to body mass: species of greater mass have proportionately larger skulls. This pattern stands in marked contrast to that for other vertebrate herbivores, in which larger−bodied species either have proportionately similar or smaller skulls relative to body mass. Larger−bodied ceratopsians evolved skulls that are 50% or more of trunk length—as measured without their expansive cranial frill. Although contemporaneous duck−billed dinosaurs also exhibit some positive allometry in the skull, skull length remains approximately 35% of trunk length. The evolution of extraordinary absolute and relative skull size among ceratopsians appears to have been driven by sexual selection and involved the tandem evolution of reduced head mobility and an obligate quadrupedal posture.
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New Mesozoic cockroaches [Blattaria: Blattulidae] from Jehol Biota of Western Liaoning in China

80%
Wang T., Ren D., Liang J. H., Shih C.
Annales Zoologici
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2007
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tom 57
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nr 3
Macaroblattula ellipsoides gen. et sp. nov., Elisama cuboides sp. nov. and E. extenuata (Ren, 1995) of the dominant cockroach family Blattulidae are described from the Late Jurassic/Early Cretaceous Yixian Formation of western Liaoning in China. Forewing venation of E. extenuata reveals low variation (CV for total number of veins = 6.22), which indicates active flight of this advanced taxon. Presence of Macaroblattula gen. nov. suggests a generic variation and high adaptability of the family. Taxonomic composition supports the transitional Late Jurassic/Early Cretaceous age of the Yixian Formation and dominance of the family Blattulidae within assemblage indicates their significance in food chain.
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New data on cranial anatomy of the ceratopsian dinosaur Psittacosaurus major

80%
You H. L., Tanoue K., Dodson P.
Acta Palaeontologica Polonica
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2008
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tom 53
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nr 2
An exceptionally preserved skull and mandible of ceratopsian dinosaur Psittacosaurus major revealed many anatomical details such as the existence of an elliptical median interpremaxillary foramen, a prominent neurovascular canal on the internal wall of the beak, long, slightly divergent basipterygoid processes developed as vertical blades with a deep cleft between them, and horizontally oriented vomer. The new specimen shows two autapomorphies of Psittacosaurus major, the transversely narrow dorsal skull roof and very prominent dentary flanges, confirming the presence of two large−skulled psittacosaur species in the Lujiatun Bed of the Lower Cretaceous Yixian Formation in Beipiao City, western Liaoning Province, China, the longand narrow−skulled P. major, and broad−skulled P. lujiatunensis.
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New beetles [Insecta: Coleoptera: Archostemata] from the Late Mesozoic of North China

70%
Tan J., Ren D., Shih C.
Annales Zoologici
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2007
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tom 57
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nr 2
Two new genera including four new species of fossil beetles assigned to the family Schizophoridae - Menopraesagus explanatus gen. and sp. nov., M. oxycerus gen. and sp. nov., M. grammims gen. and sp. nov. and Homocatabrycus liui gen. and sp. nov., and a new genus including one new species assigned to the family Ademosynidae - Lasiosyrie euglyphea gen. and sp. nov. are described. All of them are collected from the Middle Jurassic Jiulongshan Formation of eastern Inner Mongolia, China. Another two new fossil species referable to the genus Tetraphalerus of family Ommatidae, Tetraphalerus latus sp. nov. and Tetraphalerus curtinervis sp. nov., are reported from the Jehol Biota of western Liaoning, China.
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