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新疆上三叠统黄山街组的哈萨克虫是一种已经绝灭了的淡水甲壳类，它与背甲目的淡水鲎虫是形态相似、关系密切、平行演化的两个枝系，但地质和地理分布远比后者短和局限，在划分和对比有关陆相地层上十分有意义。过去国内外学者曾对它进行过多次研究，但对化石本身一些结构构造和形态功能的了解还不十分清楚，甚或有错误。本文所研究的材料采自吐鲁番、准噶尔和塔里木盆地，２７０块标本上有４００多个体，近半数保存有软体印模，有些标本连胸肢上透明的扇叶的轮廓也由刚毛的痕模压印了出来，有些标本上还保存有卵粒、食物团、才由肛门排出的粪便以及刚刚孵化出来的幼仔等，精美绝伦，堪称化石矿珍藏。通过对这些材料的研究，发现哈萨克虫有一对远远分开的眼睛长在唇瓣后侧前额的外缘，背器官下方的圆形凸起不是“一双愈合的复眼”，而与颚间片上的构造有关；除第二触角外还有第一触角，比前者略短；１１对胸肢的最后两对稍有变化，其前端的３个内肢退化成２个，修正了过去对每个胸肢结构构造认识上的错误，找到了鳃副叶与扇叶的正确位置。记述了淡水鲎虫与哈萨克虫的区别，阐明了后者的生活习性，并对其个体发育、筋肉系统、血液与脱氧的关系、生存古环境等方面的问题进行了讨论和探索
The Kazakh fauna of the Upper Triassic Huangshanjie Formation in Xinjiang is an extinct freshwater crustacean that is closely related and parallely evolved to the carapace. The geology and geography Distribution than the latter short and limited, in the division and contrast on the terrestrial formation is very meaningful. In the past, scholars at home and abroad have conducted many studies on it, but the understanding of some structural features and functions of fossils is not clear or even wrong. The material studied in this paper was collected from Turpan, Junggar and Tarim Basin. There were over 400 specimens on 270 specimens. Nearly half of the specimens were preserved in soft molds. Some specimens, even the transparent blades on the thoracic extremities, Out of some specimens also preserved eggs, food groups, excrement was only discharged from the anus and the newly hatched pups, exquisite, 堪称 fossil mine collection. Through the study of these materials, it has been found that the Kazakh insects have a pair of distant eyes that are long at the outer edge of the posterior forehead of the labial velum. The circular bulges under the back organ are not “a pair of healing compound eyes” Structure; related to the second antennae in addition to the first antennae, slightly shorter than the former; 11 pairs of the last two pairs of thoracic changes slightly, the front end of the three inner limbs degenerated into two, amended in the past for each chest Limb structure and structure of the error on the understanding, to find the correct location of the leaves and leaves of the gill. Described the difference between the freshwater pinworm and Kazakh insects, clarified the latter’s habits, and its individual development, muscle system, the relationship between blood and deoxygenation, paleontology and other aspects of the environment were discussed and explored