贵州关岭地区中—上三叠统海参骨片化石的首次发现

Discovery of Middle-Upper Triassic holothurian sclerites from Yongning,Guanling,Guizhou

报道了贵州关岭地区中—上三叠统竹杆坡组发现的海参骨片化石5属6种及2个属种未定的形态类型。分析了海参化石属种的历史分布特征,上述化石指示竹杆坡组为晚三叠世沉积产物。这一发现进一步丰富了关岭生物群的内容,为探讨中国三叠纪海参骨片化石的分类及演化增加了新的资料。

The holothurian sclerite fossils recorded in the present paper are first found in the Middle-Up-per Triassic(Ladian-Canian)Zhuganpo Formation of the Guanling area,Guizhou,southwestern China.A total of 5genera and6species,including2unidentified species,are described.Another2unidentified taxa are shown in the plate.The characteristics of the historical distribution of the holothurian sclerites are de-scribed.The above-mentioned fossils indicate that the Zhuganpo Formation is the product of Late Triassic deposition.The discovery further enriches the content of the Guanling biota and provides new materials for the study of the taxonomy and evolution of Triassic holothurian sclerites of China.