【摘要】 文章描述了云南寒武纪早期澄江生物群小细丝海绵属一新种——螺旋小细丝海绵(Leptomitella spiralis sp. nov.)。新种具有横向骨针束围绕海绵体呈螺旋状排列的典型特征,明显区别于属内其他种;此外,在外部形态和骨针类型上与属内其他种也存在较大差异。新种的发现增加了Leptomitella种间形态结构的多样性,也为海绵动物的早期演化及寒武纪海绵动物辐射演化研究提供新的化石资料。更多还原

【Abstract】 This paper presents descriptions of Leptomitella spiralis sp. nov. from the early Cambrian Chengjiang biota, Yunnan Province, China. The most typical character of L. spiralis sp. nov. is that the horizontal spicule bundles were spirally arranged around the sponge body. Additionally, there are obvious distinctions in the external morphology and the types of spicules between L. spiralis sp.nov. and other species within Leptomitella. New information obtained from L. spiralis sp. nov. increases the diversity of morphological structure of Leptomitella, and also provides new data for exploring the early evolution and radiation of sponges in the Cambrian period.更多还原