Height/length scatter plots of species recovered from the Maantang Formation, Jushui and Hanwang, Sichuan Province, South China, Tuvalian, Late Carnian, Late Triassic. In all diagrams, the dimensions of right and left valves of complete carapaces are shown separately and illustrated in the same colour. A: Bairdia jiangyouensis Xie in Wei, Li, Jiang and Xie, 1983. All specimens are from Carnian and Norian of the Sichuan Province (Wei et al., 1983; this work). B: Bairdia cf. peneovoidea Bolz, 1971b. All specimens are from the Sichuan Province (this work). C: Carinobairdia cabralae Forel n. sp. All specimens are from the Sichuan Province (this work). D: Hiatobairdia senegasi Forel n. sp., morphology 1 (males), all specimens are from Carnian and Norian of the Sichuan Province (Zheng, 1976; this work), F: morphology 2 (females). E: Hiatobairdia zhengshuyingi Forel n. sp. All specimens are from Carnian and Norian of the Sichuan Province (Zheng, 1976; Wei et al., 1983; this work). G: Pontocyprella goussardi Forel n. sp. All specimens are from the Sichuan Province (this work). H: Hungarella gommerii Forel n. sp. All specimens are from the Sichuan Province (this work).