海南岛晚泥盆世—早石炭世牙形刺  

LATE DEVONIAN—EAELY CARBONIFEROUS CONODONTS FROM THE HAINAN ISLAND

作　　者：张仁杰[1] 王成源[2] 姚华舟[1] 牛志军[1] 王建雄[1] 吴健辉[3] 

机构地区：[1]中国地质调查局宜昌地质调查中心,宜昌443003 [2]中国科学院南京地质古生物研究所,南京210008 [3]湖北省国土资源职业技术学院,荆州434000

出　　处：《微体古生物学报》2010年第1期45-59,共15页Acta Micropalaeontologica Sinica

基　　金：国家自然科学基金(批准号40772022;40839910);中国地质调查局国土资源大调查项目(No.1212010811040)成果之一

摘　　要：作者描述了海南岛昌江县石碌地区昌江组首次发现的牙形刺Palmatolepis gracilis gracilis Bransonet Me-hl,P.gracilis sigmoidalis Ziegler,Polygnathus ansatus Ziegleret Klapper,Polynodosus germanus(UlrichetBassler),Neopolygnathus dentatus(Druce)等和白沙县金波地区南好组第二段的Siphonodella levis(Ni),Polygnathus cf. inornatus Branson等,共8属20种,并据此将含化石地层分别确定为晚泥盆世法门期和早石炭世杜内期早期。指出以往认为是中泥盆统吉维特阶带化石Polygnathus ansatus Ziegleret Klapper与法门期牙形刺化石共同出现于昌江组并非构造混杂所致,但并不排除可能是化石再沉积作用的原因。同意将Polynodosus属从Polygnathus属中分离出来,在我国首次采用Polynodosus。Eight genera and 20 species of conodonts found for the first time from the Changjiang Formation of the Shilu area,Changjiang County,and from the middle-upper part of Member 2,Nanhao Formation,Jinbo area,Baisha County respectively,were described herein. They include Palmatolepis gracilis gracilis Branson et Mehl,P. gracilis sigmoidalis Ziegler,Polygnathus ansatus Ziegler et Klapper,Polynodosus germanus （Ulrich et Bassler）,Neopolygnathus dentatus （Druce）,Siphonodella levis （Ni） and Polygnathus cf.. inornatus Branson etc. The fossil-bearing rocks were placed into the Famennian of the Late Devonian and Early Tournaisian of the Early Carboniferous respectively. It is worth noting that the Polygnathus ansatus Ziegler et Klapper,a Givetian zonal guide fossil,occurred together with the Famennian conodonts in Changjiang Formation. It may not be caused by the tectonic mélange,while can not eliminate the possibility of fossil re-worked. The Polynodosus,separated from Polygnathus,was accepted for the first time in China in present paper.

关 键 词：牙形刺 晚泥盆世—早石炭世 海南岛 

分 类 号：Q915[天文地球—古生物学与地层学]