Wu 1987. Upper Silurian trilobites from Luqu-Tewo area of West Qinling Mts., China. Late Silurian-Devonian strata and fossils from Luqu-Tewo area of West Qiunling mountains, China. Volume 2., Nanjing University Press, Nanjing., 1987: 1-450. Chapter pagination: 243-256