Ostrowiec Świętokrzyski, Poland
Ostrowiec Świętokrzyski, Poland
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Xing L.,China University of Geosciences | Peng G.,Zigong Dinosaur Museum | Marty D.,Office de la Culture Paleontologie A16 | Ye Y.,Zigong Dinosaur Museum | And 5 more authors.
Acta Palaeontologica Polonica | Year: 2014

The Longguan dinosaur tracksite in the Sichuan Basin (China) is described. It is located in the uppermost part of the Upper Triassic Xujiahe Formation and displays a single, unusual trackway consisting of 19 deeply impressed pes imprints. All tracks have suffered from erosion over many years of exposure, but they still reveal interesting details such as conspicuous elongated grooves, interpreted here as toe and claw drag marks. The trackmaker, a medium-sized archosaur, was walking in a thick and relatively soft layer of sand. The elongated, oval shape of the footprints resembles the ichnogenus Eosauropus from North America and Europe, assigned to facultative bipedal sauropodomorphs. The Chinese track differs by inward rotation of the footprints toward the midline, whereas in Eosauropus, these are turned strictly outward. Other ichnotaxa and possible trackmakers are discussed, but presently, a distinct assignment cannot be given. The Longguan trackway enlarges the scarce footprint record from the Triassic of China. © 2014 L. Xing et al.

Xing L.-D.,University of Alberta | Xing L.-D.,Chinese Academy of Sciences | Gierlinski G.D.,JuraPark | Gierlinski G.D.,Polish Geological Institute Rakowiecka | And 2 more authors.
Geological Bulletin of China | Year: 2012

A probable theropod dinosaur crouching trace and associated tracks from the Tuchengzi (Houcheng) Formation of Siliang Mountain, Chicheng County, Hebei Province, China are the largest theropod tracks currently known from the formation. Although the crouching trace lacks manus and tail marks, the traces are interpreted as made by a crouching theropod because they include a left metatarsal impression and associated ischial, and possibly pubic, callosity traces. This represents the third known example of an asymmetric crouching position adopted by a theropod.

Xing L.-D.,University of Alberta | Xing L.-D.,Chinese Academy of Sciences | Harris J.D.,Dixie State University | Gierlinski G.D.,JuraPark | And 5 more authors.
Palaeoworld | Year: 2012

Here we describe the pterosaur and tridactyl dinosaur footprint assemblage from a new tracksite in the Early Cretaceous Qugezhuang Formation near the Wenxiyuan Community in Jimo County-level City, Qingdao City, Shandong Province, East China. The construction of a community building has, since the discovery, covered the majority of tracks, but a few specimens on abandoned building stones constitute the first pterosaur track record in eastern China. The pterosaur tracks are assigned to Pteraichnus isp. and were probably made by a small to medium-sized pterodactyloid. The new pterosaur trackway contributes to the growing database of pterosaurian ichnites in Asia. The Wenxiyuan tridactyl dinosaur tracks are morphologically similar to those of theropods, but they are too poorly preserved to be referred to any particular ichnotaxon. © 2012 Nanjing Institute of Geology and Palaeontology, CAS.

Xing L.,China University of Geosciences | Lockley M.G.,University of Colorado at Denver | Marty D.,Office de la culture | Klein H.,Saurierwelt Palaontologisches Museum | And 7 more authors.
Cretaceous Research | Year: 2013

New dinosaur track assemblages were discovered recently in the Tianjialou Formation of the Lower Cretaceous Dasheng Group in Shandong Province, China. Theropods are represented by the trackways of two different medium-sized groups: (1) tridactyl tracks with a typical mesaxonic shape; (2) functionally didactyl tracks attributed to deinonychosaurian theropods. The latter report, the third from the Cretaceous of Shandong Province, enlarges the global record of didactyl theropod tracks, until now sparsely documented from only a few locations in Asia, North America and Europe. A number of features in the dromaeosaur trackway suggest the assignment to cf. Dromaeosauripus. Several medium-sized trackways resemble the narrow-gauge, small manus ichnogenus Parabrontopodus, and one large trackway is characterised by a wide-gauge and large manus, similar to Brontopodus. This suggests the co-occurrence of two different sauropod groups. A further component in these ichnoassemblages is a tetradactyl morphotype and trackways of ornithischian affinity that are tentatively attributed to psittacosaurs. © 2013 Elsevier Ltd.

Xing L.-D.,China University of Geosciences | Xing L.-D.,University of Alberta | Lockley M.G.,University of Colorado at Denver | Li Z.-D.,Geophysical Team of Sichuan Bureau of Geological and Mineral Investigation and Exploration | And 7 more authors.
Palaeoworld | Year: 2013

Theropod footprints from the Middle Jurassic Xincun Formation in the Panxi region (Sichuan Province, Southwest China) show strong similarities to the ichnogenus Kayentapus. They are characterized by slender digits, wide digit divarication, and a characteristic pad configuration that is different from other Jurassic theropod ichnotaxa. At the Shansong tracksite, three trackways are present, each consisting of four consecutive tracks (stride and pes lengths up to 200. cm and 36. cm, respectively). The speed of the trackmakers has been calculated with values between 1.1 and 1.4. m/s. The assemblage is a further document of a Middle Jurassic occurrence of this morphotype that is basically known from the Lower Jurassic deposits elsewhere. This could be due to peculiarities of theropod communities in this region, reflecting a different paleobiogeographic distribution pattern in the Middle Jurassic. Biostratigraphically, ostracods lend support to a Middle Jurassic age of the trackbearing unit. This corresponds partly with data from the Shangshaximiao Formation that is considered to be of Middle Jurassic age based on ostracods but Late Jurassic age based on vertebrate skeletons. The ichnological record and the presence of Kayentapus-like footprints in both units support a Lower-Middle Jurassic age. © 2012 Elsevier B.V. and Nanjing Institute of Geology and Palaeontology, CAS.

Xing L.D.,China University of Geosciences | Lockley M.G.,University of Colorado at Denver | Klein H.,Saurierwelt Palaontologisches Museum | Gierlinski G.D.,JuraPark | And 6 more authors.
Palaeoworld | Year: 2014

Deposits from the Ordos Basin of mid-western China are rich in body fossils and ichnofossils of Early Cretaceous vertebrates. Thousands of Early Cretaceous sauropod, theropod and bird tracks described since 1958 have been found at several localities in the basin. We report two new sites (Dijiaping and Bawangzhuang) in the Luohe Formation of the Ordos Basin, Shaanxi Province, which contain small theropod footprints that are here referred to the ichnogenus Jialingpus. The assignment is based on pad configurations including (1) the large metatarsophalangeal area positioned in line with the axis of digit III, (2) the subdivision of this part into a small pad behind digit II, which in some specimens is close to the general position of the hallux (digit I), and a large metatarsophalangeal pad behind digit IV, and (3) a distinct inter-pad space between metatarsophalangeal pads and proximal phalangeal pads of digits II and III. We re-describe the type material of the type ichnospecies Jialingpus yuechiensis from the Upper Jurassic Penglaizhen Formation of Sichuan Province, proposing a largely amended diagnosis for this ichnotaxon. The presence of a digit I trace in the holotype, indicating a relatively long hallux, and the large metatarsophalangeal area positioned in line with digit III distinguishes Jialingpus from the ichnogenus Grallator and similar tracks that all lack these features. The only difference between Jialingpus specimens from the Cretaceous of the Ordos Basin and those of the Jurassic Penglaizhen Formation is the larger digit divarication in the Cretaceous taxon. This is the fourth record of Jialingpus in China and the second in Cretaceous strata, with the first being those from the Huangyangquan locality in Xinjiang, China. © 2014 Elsevier B.V. and Nanjing Institute of Geology and Palaeontology, CAS.

Niedzwiedzki G.,University of Warsaw | Niedzwiedzki G.,Polish Academy of Sciences | Singer T.,JuraPark | Gierlinski G.D.,JuraPark | And 2 more authors.
Cretaceous Research | Year: 2012

The Djadokhta Formation of the Gobi Desert is known for the number and diversity of dinosaur and other vertebrate bones and skeletons found there, but only theropod, hadrosaur and supposed ankylosaurid footprints have been reported from this stratum. Dinosaur footprints are also noted from the Nemegt Formation, and occur as typical dinosaur track accumulations (tracksites). An articulated protoceratopsid skeleton - specimen ZPAL Mg D-II/3 - was collected by the Polish-Mongolian Expedition of 1965 from the Djadokhta Formation of Flaming Cliffs in Mongolia. Recently, the natural cast of a tetradactyl digitigrade footprint was found underneath the pelvic girdle while the skeleton and matrix were being prepared. This is possibly the first find of a dinosaur track in close association with an articulated skeleton. Although Protoceratops is an extremely common dinosaur in Mongolia, its footprints have never previously been reported from the Late Cretaceous of the Gobi Desert. © 2011 Elsevier Ltd.

Xing L.,China University of Geosciences | Xing L.,Chinese Academy of Sciences | Lockley M.G.,University of Colorado at Denver | McCrea R.T.,Peace Region Palaeontology Research Center | And 6 more authors.
Cretaceous Research | Year: 2013

Despite being widely distributed in the Middle-Late Jurassic and earliest Cretaceous of Europe and sparsely distributed in the Late Jurassic of North America, the thyreophoran ichnotaxon Deltapodus is represented largely by morphologically suboptimal material. In particular, manus tracks are poorly defined in almost all previously reported specimens, likely due to preservational factors. Nonetheless, two ichnospecies, D. brodericki and D. ibericus, have been erected based on European material. Here we report the first Chinese examples of Deltapodus from the Cretaceous of Xinjiang Uyghur Autonomous Region, China. These specimens are also the youngest unambiguous occurrence of this ichnogenus, and the second reported occurrence from Asia. The specimens have well-defined manus traces with readily identifiable traces of digits I and II, enabling their placement in a new ichnospecies: Deltapodus curriei ichnosp. nov. Although not unequivocal in all cases, Deltapodus is likely of stegosaurian affinity, given the occurrence of stegosaurian body fossils in related deposits in Xinjiang. Deltapodus tracks are far more common and widespread than Stegopodus or Apulosauripus, the only other ichnogenera with tridactyl pes prints that have been attributed to large thyreophorans. © 2013 Elsevier Ltd.

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