关键词: 古蠕虫, 骨片, 个体生长, 湖南省, 华南地区, 王村特异埋藏生物群

Abstract: Newly recovered palaeoscolecid cuticle fragments in 3-D preservation from the Furongian (upper Cambrian) of Hunan Province, South China are reported. Two form new genera and two form new species, Hunanoscolex campus gen. et sp. nov. and Ornatoscolex hunanensis gen. et sp. nov. are described. Most of the specimens are juvenile individuals. The great variation of annulus width in Hunanoscolex campus indicates growth of the worm, which allows us to examine the growth impact on the worm cuticle. The worm grows by adding more sclerites to each annulus. The spacing of plates in the same row gets looser. The new microplates and platelets remain constant in size and ornamentation but the ornamentation of plate may change. These observations give better understanding of the intraspecific variation of the worm cuticle, and may enhance the taxonomy accuracy of palaeoscolecid cuticle fragments.

Key words: palaeoscolecid, cuticle, growth, Hunan Province, South China, Wangcun Lagerst?tte