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根据陕西西乡梅树村期西乡生物群中获得的64枚马哈螺类化石个体的壳形和纹饰特征类型,确认该类化石有6个属,同时对其中3个属进行了系统分类研究,并建立了西乡中间锥新种Mediata xixiangensis sp.nov.。文中还对马哈螺类化石个体的不同部位进行了能谱分析和个体长宽高的测量统计,结果显示马哈螺类的壳质成分是磷酸钙,含少量氟和铝元素。马哈螺类的个体均较小,不超过1 mm,其中长度一般为300—700μm,宽度为250—550μm,厚度为200—300μm。上述研究对今后世界范围内寻找和研究此类化石,尤其对单板类的起源研究,有重要的意义。
According to the crustal and ornamental characteristics of 64 Maha-pyral fossils obtained from the Xixiang biota in the Meishu village, Xixiang, Shaanxi Province, 6 genera of these fossils were identified and 3 of them were systematically classified Research and establish a new species of Mediata xixiangensis sp.nov in Xixiang. In this paper, the energy spectrum analysis and individual length-width-height measurements of different parts of the Mahaglass fossils were also conducted. The results showed that the malachite content is calcium phosphate with a small amount of fluorine and aluminum. Maha snails are small individuals, not exceeding 1 mm in length, which typically have a length of 300-700 μm, a width of 250-550 μm, and a thickness of 200-300 μm. The above research is of great significance to the future worldwide research on the fossil, especially on the origin of veneer.