Late Triassic sauropodomorph and Middle Jurassic theropod tracks from the Xichang Basin, Sichuan Province, southwestern China: First report of the ichnogenus Carmelopodus
| Autor: | W. Scott Persons, Chunyong Chou, Sheng-Wu Yan, Lida Xing, Martin G. Lockley, Hendrik Klein, Jin Ba, Anthony Romilio |
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| Rok vydání: | 2018 |
| Předmět: |
010506 paleontology
Ichnofossil Fauna Geography Planning and Development Footprint Trace fossil Structural basin 010502 geochemistry & geophysics 01 natural sciences Paleontology Proximal margin Ichnotaxon Upper Triassic Xujiahe Formation Xichang Basin China lcsh:QE701-760 0105 earth and related environmental sciences Earth-Surface Processes Sichuan Province Sauropodomorph Middle Jurassic Shaximiao Formation Theropod lcsh:Paleontology Type locality Geology |
| Zdroj: | Journal of Palaeogeography, Vol 7, Iss 1, Pp 1-13 (2018) |
| ISSN: | 2095-3836 |
| DOI: | 10.1016/j.jop.2017.11.004 |
| Popis: | Upper Triassic and Middle Jurassic strata of the Xichang Basin in Sichuan Province, southwestern China, yielded important dinosaur ichnofossils. From the Xujiahe Formation of the Yiguojiao tracksite, we report a Late Triassic footprint assemblage in China and the first discovery of diagnostic Triassic sauropodomorph tracks in this region. The tracks share a number of features in common with the ichnogenera Eosauropus (Late Triassic) and Liujianpus (Early Jurassic). The neighboring Bingtu tracksite is stratigraphically younger (Shaximiao Formation, Middle Jurassic) and preserves small tridactyl theropod tracks that represent the first occurrence of the ichnotaxon Carmelopodus in China and Asia. While these tracks are morphologically comparable to those from the Middle Jurassic type locality in North America, the specimens from China show the proximal margin of the digit IV impression in a more cranial position, which may indicate a trackmaker with a relatively short metatarsal IV. In addition to the skeletal record, the Carmelopodus footprints document the presence of small theropods in the dinosaur fauna of the Middle Jurassic Shaximiao Formation. |
| Databáze: | OpenAIRE |
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