论文摘要
So far most of the southeast Asian dinosaur fossils have been found in the Khorat Group, a stratigraphic unit of continental formations ranging from the Late Jurassic with the lower part of the Phu Kradung to the AptianAlbian with the Khok Kruat Formation of Thailand.Ornithischian dinosaurs in Khorat Group of Thailand were known from two formations the lowest Phu Kradung and the top-most Khok Kruat.The latter formation presents a highly abundant neornithischian dinosaurs comprises 4 taxa of iguanodonts plus one taxon of basal ceratopsian whereas a stegosaur remain was a presence in the Phu Kradung Formation.Recently, the nearly complete skeleton except the cranial of smallbodied ornithischian remains has yielded together with various size of femurs and a few isolated cranial parts from the extraordinary site of Phu Noi located in Kalasin province.Although these remains are un-publish the distinct characters such as asymmetrically distributed enamel on the lingual surface of fan-shaped dentary teeth, narrowing, along with a perfectly rounded termination of the preacetabular process of the ilium, including short and high postacetabular process suggesting that it is the oldest neornithischian in southeast Asia.Both stegosaurs and small neornithischians illustrate an early stage in the evolution of this group, which resemble those Chinese ornithischians from the Middle to Late Jurassic Dashanpu Formation.The principal purpose of this study is to illustrate the diversity of ornithischian assemblages in Thailand, providing an updated review and a discussion about their particular history and their role in the palaeoecology during crucial periods of the Mesozoic as no evidence of them occurring in the Early Cretaceous Sao Khua Formation（Barremian）.Although Barremian ornithischians of Japanese Kitadani Formation or English Wealden Group are abundant, does not mean that the Sao Khua ornithischians were completely absent, but reflected niche overlap and competition between herbivores considerably.
论文目录
文章来源
类型: 国际会议
作者: Sita MANITKOON,Uthumporn DEESRI
来源: 第一届亚洲古生物学大会—暨中国古生物学会成立90周年纪念 2019-11-17
年度: 2019
分类: 基础科学
专业: 生物学,地质学
单位: Palaeontological Research and Education Centre, Mahasarakham UniversityFaculty of Science, Mahasarakham University
分类号: Q915.2
页码: 99
总页数: 1
文件大小: 169k
下载量: 1