New palaeoscolecid worms from the Furongian (upper Cambrian) of Hunan, South China: is Markuelia an embryonic palaeoscolecid?

被引：27

作者：

Duan, Baichuan ^{[1
]}

Dong, Xi-Ping ^{[1
]}

Donoghue, Philip C. J. ^{[2
]}

机构：

[1] Peking Univ, Sch Earth & Space Sci, Beijing 100871, Peoples R China

[2] Univ Bristol, Sch Earth Sci, Bristol BS8 1RJ, Avon, England

来源：

PALAEONTOLOGY | 2012年 / 55卷

基金：

中国国家自然科学基金;

关键词：

Palaeoscolecida; Priapulida; Scalidophora; Introverta; Cycloneuralia; Wangcun Lagerstatte; ORSTEN-TYPE PRESERVATION; WESTERN HUNAN; CRUSTACEA; MIDDLE; PHOSPHATOCOPINA; ANATOMY; FOSSILS; RECORD; SHALE; HADIMOPANELLA;

D O I：

10.1111/j.1475-4983.2012.01148.x

中图分类号：

Q91 [古生物学];

学科分类号：

0709 ; 070903 ;

摘要：

Three-dimensional fragments of palaeoscolecid cuticle have been recovered from the Furongian (upper Cambrian) of Hunan, South China. Extraordinary preservation of the fossils shows exquisite surface details indicating a three-layered structure of the cuticle. One new genus and two new species Dispinoscolex decorus gen. et sp. nov. and Schistoscolex hunanensis sp. nov. are described. The co-occurrence of these palaeoscolecid remains with those of Markuelia hunanensis allowed us to test the hypothesis that Markuelia, known hitherto only from embryonic remains, is an embryonic palaeoscolecid. The comparative anatomy of Markuelia and the co-occurring palaeoscolecids shows a number of distinctions, particularly in the structure of the tail; all similarities are scalidophoran or introvertan (cycloneuralian) symplesiomorphies. The available evidence does not support the interpretation of Markuelia as an embryonic palaeoscolecid.

引用

页码：613 / 622

页数：10

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