New Maikhanellid Shells and Siphogonuchitid Spicule Bundles from the Cambrian Fortunian Stage of South China

作     者：LIU Yunhuan ZHANG Yanan SHAO Tiequan TANG Hanhua JIANG Kaituo WANG Qi CHEN Cheng DONG Junyan LIANG Yongchun DAI Jun XUE Jiaqi 

作者机构：School of Earth Sceince andResouces Chang'an University Xi'an 710054 China Key Laboratory for the study of FocusedMagmatism and Giant Ore Deposits MLR Xi 'an 710054 China 

出 版 物：《Acta Geologica Sinica(English Edition)》 (地质学报（英文版）)

年 卷 期：2016年第90卷第5期

页      面：1629-1636页

核心收录：

学科分类：070903[理学-古生物学与地层学(含：古人类学)] 0709[理学-地质学] 07[理学] 

基　　金：supported by the National Natural Science Foundation of China(41572009,41572007, 41472015) College Students' Innovative Entrepreneurial Training Program of Chang'an University(Grant No. 201610710043,201610710044,201610710047, 201610710045),0012-310600161000 The Tenth "Challenge Cup" Competition of Chang'an University (C-P-B-2,C-P-B-6,C-P-B-8) 

主　　题：maikhanellids siphogonuchitids Cambrian Fortunian Stage South China 

摘      要：Maikhanellids are a distinct group of Cambrian Fortunian small shelly fossils by the capshaped profiles and scaly shell *** to the individual shell shape and ornamentation feature types of 50 maikhanellids fossils which were collected from Xixiang botia,we confirmed the family Maikhanellidae content of six genera,which are Maikhanella,Ramenta,Purella,Ramentoides,Yunnannopleura and *** the halkieriid animals whose shells and spicules are articulated on different body parts,maikhanellids were presumably yielded by siphogonuchitid spicules penetrating the intermediate matrix（the ＂spicule shell＂ hypothesis）,and this is the reason that some researchers treated maikhanellids and co-occurring siphogonuchitids as *** affinities of Maikhanellids and siphogonuchitids remain ***,we report three dimensionally phosphatized maikhanellid shells and siphogonuchitid spicule bundles from the Cambrian Fortunian small shell faunas of South *** differ from all the previously reported maikhanellids and siphogonuchitids,and may represent new *** intact and smooth surface underneath the partially preserved scales of the shells challenges the ＂spicule-shell＂ *** present siphogonuchitid spicules differ from the maikhanellid scales in size,morphology,*** pattern,thus the spicules might not be derived from the *** the shells and spicule bundles were articulated on different body parts of the same animals remains unknown.