Histological observation of some primitive euconodonts of Late Cambrian from Liaoning

Histological observation of some primitive euconodonts of Late Cambrian from Liaoning

GUO Wei;DONG Xiping;ZENG Xiaochun;ZHAO Le

【期刊名称】《自然科学进展（英文版）》 【年(卷),期】2005(015)012

【摘要】The histology of some euconodonts of Late Cambrian from Benxi and Fuxian County, Liaoning Province is studied by the oil-immersion technique. The histological characteristics of six primitive species of euconodonts - Proconodontus muelleri, Proconodontus tenuiserratus, Granatodontus ani, Rotundoconus tricarinatus, Teridontus nakamurai and Cordylodus proavus are describedin detail. Tubular dentine and atubular (parallel- and wavy-lamellar) dentine are found in the basal bodies of the primitive euconodonts Proconodontus tenuiserratus and Proconodontus muelleri, respectively. The tubular dentine and spherulitic dentine are also recognized from the basal bodies of Granatodontus ani and Rotundoconus tricarinatus. Since the histological characteristics of the studied six species of euconodonts belonging to Proconodontus lineage and Teridontus lineage Sensu Miller (Univ Kansas Paleontol Contr, 1980, 99: 1-39)seems to be almost the same, euconodonts are proposed as possibly monophyletic herein. 【总页数】5页(1084-1088)

【关键词】histology;primitive euconodonts;Late Cambrian;Liaoning