Four proetid trilobite species, Chuanqianoproetus guizhouensis Yin in Yin and Li, 1978, C. shuangheensis Wu, 1977, C. sp., and Latiproetus guizhouensis Yin in Yin and Li, 1978, are described from the Ningqiang Formation in Ningqiang County, Shaanxi, China. They are middle Telychian (Llandovery, Silurian) in age. Chuanqianoproetus and Latiproetus are both regarded as members of the subfamily Warburgellinae; the former has been considered to be a junior subjective synonym of Astroproetus, but on the basis of its morphology we argue here that they represent two independent genera. The poorly sorted bioclastic grainstones containing trilobite sclerites may indicate their deposition in turbulent conditions on an open marine platform.

四个变种三叶虫种，贵州的川川石羊球菌阴和李，1978年，吴双河，1977年，C。1978年阴和李氏中的云杉等和贵州拉提氏藻是从陕西宁强县的宁强组中描述的。他们年龄在中特利琴时代（Llandovery，Silurian）。Chuanqianoproetus和Latiproetus均视为亚科Warburgellinae的成员; 前者被认为是Astroproetus的初级主观同义词，但根据其形态，我们在此认为它们代表两个独立的属。含有三叶虫硬沸石的生物碎屑分类不良的岩石可能表明它们在湍流条件下沉积在开放的海洋平台上。