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花垣县渔塘铅锌矿含矿层时代,按湖南省地质矿产局四○五地质队的意见,属于早寒武世晚期。1981年笔者等在该区含矿层位及其上下层位发现一批三叶虫化石,特别是在含矿层位的下部发现大量渔塘叉尾虫(新种),据此笔者认为该含矿层的层位可能已属中寒武统,其地质时代可能为中寒武世早期,不是早寒武世晚期。本文共描述三叶虫7属11种(萁中有2个新种及2个夫定属种)。
The age of Yuzhang lead-zinc ore-bearing layer in Huayuan County, according to the opinion of 404 geological team of Bureau of Geology and Mineral Resources of Hunan Province, belonged to the late Early Cambrian. In 1981, the author found a number of trilobite fossils in the ore-bearing beds and their upper and lower strata in the area, especially in the lower part of the ore-bearing beds where a large amount of foxtail (new species) was found. According to this, May have belonged to the Middle Cambrian, the geological epoch may be Early Cambrian, not the late Early Cambrian. This article describes a total of 7 species of trilobites 11 species (萁 in 2 new species and 2 husbands genus).