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基于从新疆塔里木盆地西北缘巴楚依木于他马组获得的软骨鱼类微体化石新材料，建立1新属2新种．根据软骨鱼类的对比，确定依木干他乌组为志留系兰多维列统特列奇阶。依木干地乌组是我国正式报道的软骨鱼类微体化石的最低层位。软骨鱼类化石的发现表明，我国志留系富含无颌类和鱼类的“上红层”和“下红层”为滨海或浅海沉积。
Based on the new material of cartilaginous fossil microfossils obtained from the Bachuyimu Formation in the northwestern margin of the Tarim Basin in Xinjiang, two new genera and one genus were established. According to the comparison of cartilaginous fishes, it is determined that the Ezhugantawu Formation belongs to the Silurian Randolphian System Trait Order. According to the woodland Ustilago is officially reported in China the lowest level of cartilaginous fossil microfossils. The discovery of cartilaginous fish fossils shows that the “upper red beds” and “lower red beds” which are rich in jawless fishes and fish in China are the sediments of coastal or shallow sea.