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New Evidence of sauropod dinosaurs from the Early Jurassic Period of Thailand

Acta Geologica Sinica(English Edition) 2017年第4期91卷 1169-1178页

作者： LAOJUMPON Chalida SUTEETHORN Varavudh CHANTHASIT Phornphen LAUPRASERT Komsom SUTEETHORN Suravech Department of Biology Faculty of Science Mahasarakham University Khantarawichai Mahasarakham 44150 Thailand Palaeontological Research and Education Centre Mahasarakham University Khamrieng Maha Sarakham 44150 Thailand Sirindhorn Museum Department of mineral resources SahatSakhan Kalasin 46310 Thailand

The oldest dinosaur assemblages of Thailand deposit in continental sedimentary rocks of the Nam Phong Formation. Not only Isanosaurus attavipatchi was discovered but at least two more species of basal sauropods were found. A partial skeleton from Phu Hin Tan locality refers to sauropod taxon A. It is different from Isanosaurus and shares some characteristics with basal sauropods in the Early Jurassic. The sauropod taxon B was found in Non Sra Ard locality. Base on postcranial skeleton, sauropod taxon B shares some characteristics of the family Vnlcanodontidae. Moreover, several fragments of the sauropods specimen are also found in Pha Khok Wang Yang and Phu Noi localities. All of the evidences above indicate that there are a highly diversity of sauropods in the Nam Phong Formation. At least three sauropod species （including Isanosaurus） were found in the Nam Phong formation. The issue about the age of the Nam Phong has been debated for a long time between the Triassic and Jurassic age. All of sauropodomorphs, in this study, are more likely the Early Jurassic period dinosaurs than the Triassic period dinosaurs. And they have deposited in the upper part of Nam Phong Formation.

关键词： Isanosaurus sauropod dinosaurs Early Jurassic Nam Phong Formation Thailand

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Were sauropod dinosaurs responsible for the warm Mesozoic climate?

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Journal of Palaeogeography 2012年第2期1卷 138-148页

作者： A.J.(Tom) van Loon Geological Institute Adam Mickiewicz UniversityMaków Polnych 1661-606PoznanPoland

It was recently postulated that methane production by the giant Mesozoic sauropod dinosaurs was larger than the present-day release of this greenhouse gas by nature and man-induced activities jointly, thus contributing to the warm Mesozoic climate. This conclusion was reached by correct calculations, but these calculations were based on unrealistic assumptions:the researchers who postulated this dinosaur-induced warm climate did take into account neither the biomass production required for the sauropods’ food, nor the constraints for the habitats in which the dinosaurs lived, thus neglecting the palaeogeographic conditions. This underlines the importance of palaeogeography for a good understanding of the Earth’s geological history.

关键词： sauropod dinosaurs greenhouse conditions methane palaeogeography

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