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A REVIEW OF VERTEBRATE TRACK DISTRIBUTIONS IN EAST AND SOUTHEAST ASIA
Martin Lockley,Masaki Matsukawa 한국고생물학회 2009 고생물학회지 Vol.25 No.1
vertebrate tracksites are known throughout East and Southeast Asia, especially in the Jurassic and Cretaceous where they are dominated by the tracks of dinosaurs. In contrast, Late Paleozoic and Triassic track sites are rare, absent or unknown in most regions, and Cenozoic track sites are also sparsely distributed in many areas. Most Early Jurassic tracksites occur in China and are dominated by the tracks of theropods (e.g., Grallator and Eubrontes) with rare reports of sauropods and small omitbopods (Anomoepus). Such assemblages are typical of other regions, and ichnologists should be aware that Jurassic theropod track names are over-split, especially in the Chinese literarure where provincial ichnotaxomomy creates artificial differences. Middle and Late Jurassic sites are still poorly known and poorly documented. Despite problems with dating Cretaceous sites in some regions, Early Cretaceous sites are abundant and well-documented and widely distributed in China, Korea, Japan and Thailand where many have produced distinctive ichnotaxa which are so far unknown in other regions. These include the dinosaurian ichnogenera Minisauripus, Velociraptorichnus, Dromaeopodus, Dromaeosauripus, Toyamosauripus, Asianopodus, Siamopodus, Chabus and Qiiiangpus, the avian ichnoge-neraJindongornipes, Hwangsanipes, Uhangrichnius, Goseongornipus, Shandongornipes and Pullornipes and the pterosaurian ichnogenus Haenamichnus. The Lower Cretaceous of east Asia (especially Korea and China) has the best bird track record currently known. Generally, Upper Cretaceous tracks are less well-studied ichnotaxonomically but they are reported from significant localities in China, Korea and Mongolia. Cenozoic track sites are rare in Asia, but a number of Plio-Pleistocene sites are known in Japan, and Late Pleistocene and Holocene sites with hominid tracks occur in Japan, Korea and Tibet. The potential for a significant new Mesozoic and Cenozoic finds is probably greatest in the arid regions of Mongolia and northern and western China. However, the rate of new discovery and publication in many parts of East and Southeast Asia, shows that research in vertebrate ichnology is healthy and vibrant. Efforts to preserve important sites and develop them for education have also been impressive in many cases