摘要
本文主要报道安徽北部宿县夹沟一带,上寒武统凤山组的头足类化石新材料,并试对凤山期头足类的分布与环境之间的关系进行探讨.在野外期间,得到安徽区测队金运发、韩立刚的帮助;南京地质古生物研究所张俊明,在沉积相等方面,与笔者进行讨论并提出重要的建议,张福田摄制图影,周其义清绘插图,均此致谢.
The Upper Cambrian Fengshan Formation exposed at Jiagou of Suxian,northern Anhui,attaining a thickness of 164 m,is divided into the Suxian member in the upper and the Jiagou member in the lower,including four zones:Tsinania-Ptychaspis zone,Quadraticephalus zone,Acaroceras-Eburoceras zone and Mictosukia-Coreanocephalus zone.The present paper is to record some new cephalopods from the middle and lower parts of this formation.Besides,A brief discussion is here made on the distribution of Upper Cambrian cephalopods in North China and the relationship of cephalopod fauna with sedimentary environment.The cephalopods under the present description consist of 8 genera and 14 species,including 1 new genus and 13 new species.Of particular importance is the discovery of the new genus Oonendoceras,which appears to represent a form of Yanheceratidae closely related to Ordovician endoceroids,as diagnosed in the following.Genus Oonendoceras gen.nov.Type species:Oonendoceras sinicum gen.et sp.nov.(pl.II,figs.1-6;textfig.10).Conch nearly straight or slightly curved endogastrically,compressed in cross section,slightly annulated in surface.Siphuncle ventral in position.Septal necks subloxochoanitic,about 2/5 the length of camera.Connecting rings moderate in thickness.Diaphragms conical in shape and circular in cross section,with intervals occupied by calcareous deposits and terminal holes.Camera short,about 1 mm in height.This new genus is easily distinguished from Yanheceras by its annulated conch.Occurrence:Fengshan Stage of Late Cambrian,Northern Anhui.
作者
陈均远
齐敦伦
Chen Jun-yuan;Qi Dun-luan(Nanjing Institute of Geology and Palaeontology Academia Sinica;Regional Geological Surveying Team,Anhui Province)
出处
《古生物学报》
1982年第4期392-403,511-512,共14页
Acta Palaeontologica Sinica
