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中文摘要：
Neochonetes（新戟贝）和Tethyochonetes（特提斯戟贝）是二叠纪-三叠纪界线剖面常见的腕足类化石,对二叠纪-三叠纪之交这一重大地质历史转折期的古生态和古环境研究都具有重要价值,但它们在外部形态上十分相似,给鉴定工作带来难度。通过对中寨剖面所产该2属化石的详细观察、度量、描述、鉴定、统计与对比,从壳形、壳饰、外部和内部构造等几个方面阐述了Neochonetes和Tethyochonetes的异同。此外,在对所采标本进行分类整理的过程中,笔者还发现这2个属较多地出现在长兴阶粉砂质泥岩和硅质泥岩相中,且其时代与岩相分布具有一定的规律。
英文摘要：
This paper studied the brachiopods Neochonetes and Tethyochonetes specimens from the Permian-Triassic boundary of Zhongzhai section,Guizhou Province.The specimens of these two genera are abundantly recorded in the silty-mudstone and silicieous-mudstone facies in South China and can provide important information for understanding of the paleoenvironment during the Permian-Triassic transition.We compared Neochonetes and Tethyochonetes in detail based on careful observation,identification,statistics,as well as information from related literatures.The genera of Neochonetes and Tethyochonetes are very similar in shape.They are mainly different in outline,ornamentation,external and internal features.
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