New Small Shelly Fossils(Acanthocassis and Xinlispina Gen.Nov.) from the Fortunian Stage(Early Cambrian) in Southern China

被引：0

作者：

SHAO Tiequan ^{[1
]}

LIU Yunhuan ^{[1
,2
]}

WANG Qi ^{[1
]}

ZHANG Huaqiao ^{[3
]}

TANG Hanhua ^{[1
]}

CAO Xi ^{[1
]}

HE Huahua ^{[1
]}

ZHANG Yanan ^{[1
]}

LI Yuan ^{[1
]}

ZHENG Panlin ^{[1
]}

ZHU Chengyu ^{[1
]}

HU Jiaxi ^{[1
]}

机构：

[1] College of Earth Science and Resources, Chang’an University

[2] State Key Laboratory of Palaeobiology and Stratigraphy, Nanjing Institute of Geology and Palaeontology, Chinese Academy of Sciences

[3] Key Laboratory of Economic Stratigraphy and Palaeogeography, Chinese Academy of Sciences (Nanjing Institute of Geology and Palaeontology)

来源：

ActaGeologicaSinica(EnglishEdition) | 2015年 / 89卷 / 05期

基金：

中国国家自然科学基金;

关键词：

small shelly fossils; Fortunian Stage; Cambrian; Xinli Section; Xixiang Section; Southern China;

D O I：

暂无

中图分类号：

Q915 [古动物学];

学科分类号：

0709 ; 070903 ;

摘要：

We describe new material of three-dimensionally phosphatized small shelly fossils Acanthocassis and Xinlispina gen.nov.from the Fortunian Stage(early Cambrian) of southern Shaanxi and northern Sichuan Provinces.The new materials allow description of the delicate morphology of these skeletons, and also their skeletogenesis.Acanthocassis and Xinlispina have comparable morphological features: a main branch and radially arranged sub-branches.They differ from each other in many details, e.g., the presence of a single central branch only in Xinlispina, and the presence of small nodes only in Acanthocassis.Acanthocassis cannot be a naked anthopolyp or hydropolyp because of the more-or-less stiffened cuticle and the absence of a mouth.Acanthocassisand Xinlispina differ from coeval sponge spicules and chancelloriid sclerites and rosettes of crossed pedicellariae of echinoderms, and might be cuticular ornaments of animals of unclear affinities.They occur in the first small shelly fossil assemblage zone, and could be adopted as auxiliary fossils for biostratigraphic correlation in southern China.

引用

页码：1470 / 1481

页数：12

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