湖南晚泥盆世短胸节甲鱼类一新属  

A NEW EUBRACHYTHORACID ARTHRODIRE FROM THE UPPER DEVONIAN OF HUNAN, CHINA

作　　者：王俊卿[1] 朱敏[1] 

机构地区：[1]中国科学院古脊椎动物与古人类研究所,北京100044

出　　处：《古脊椎动物学报》2004年第2期154-161,共8页Vertebrata Palasiatica

基　　金：国家重点基础研究发展规划项目 (编号 :G2 0 0 0 7770 4);国家杰出青年基金项目(编号 :4992 5 2 0 4)和IGCP491项目资助

摘　　要：A new eubrachythoracid arthrodire, Phymosteus liui gen. et sp. nov., is described from the Upper Devonian (Early Famennian) Xiejingshi Formation of Shimen County, Hunan, central China. The specimen under study, a nearly complete nuchal plate, was collected from the upper part of the formation in association with plant fossils, such as Leptophloeum guanzhuangense and Cyclostigma hunanense, by Dr. Gen Baoyin of Institute of Botany, Chinese Academy of Sciences in 1990s. The new form is at the pachyosteomorph level of organization having a large nuchal gap and possibly referred to the Selenosteidae of aspinothoracid arthrodires. It is the first record of the aspinothroacid arthrodires from China, but whether it widens the distribution of the Selenosteidae from Europe and North America to Asia needs further fossil materials.A new eubrachythoracid arthrodire, Phymosteus liui gen. et sp. nov., is described from the Upper Devonian (Early Famennian) Xiejingshi Formation of Shimen County, Hunan, central China. The specimen under study, a nearly complete nuchal plate, was collected from the upper part of the formation in association with plant fossils, such as Leptophloeum guanzhuangense and Cyclostigma hunanense, by Dr. Gen Baoyin of Institute of Botany, Chinese Academy of Sciences in 1990s. The new form is at the pachyosteomorph level of organization having a large nuchal gap and possibly referred to the Selenosteidae of aspinothoracid arthrodires. It is the first record of the aspinothroacid arthrodires from China, but whether it widens the distribution of the Selenosteidae from Europe and North America to Asia needs further fossil materials.

关 键 词：湖南 晚泥盆世 鱼类化石 节甲鱼类 

分 类 号：Q915.862[天文地球—古生物学与地层学]