Character;Yuebeipotamon;Tenuilapotamon;Sinopotamon;Longpotamon "Epibranchial teeth";"distinct, sharp (Fig. 2A)";"indistinct, granular (cf. Dai 1999: pl. 29)";"varied (cf. Dai 1999: pl. 17)";"varied (cf. Zou et. al. 2008: fig. 1)" "Ambulatory legs";"slender (Fig. 2A)";"slender (cf. Dai 1999: pl. 29)";"stout (cf. Dai 1999: pl. 17)";"stout (cf. Zou et al. 2008: fig. 1)" "Size of triangular structure of male thoracic sternites 1, 2";"relatively large (Fig. 4C)";"relatively small (unpublished data)";"relatively small (cf. Shih et al. 2016: fig. 3C)";"relatively small (cf. Shih et al. 2016: fig. 6C)" "Male telson";"relatively short, triangular (Fig. 2C)";"relatively long, subtriangular (cf. Dai 1999: fig. 225)";"relatively long, nipple shaped (cf. Dai 1999: fig. 139)";"relatively long, subtriangular (cf. Zou et al. 2008: fig. 2)" G1;"long, reaching beyond tubercle of abdominal lock (Fig. 2D)";"short, not reaching tubercle of abdominal lock (cf. Dai 1999: fig. 225)";"long, reaching beyond tubercle of abdominal lock (cf. Dai 1999: fig. 139)";"short, not reaching tubercle of abdominal lock (cf. Dai 1999: fig. 137)" "Terminal segment of G1";"lo006Ecxcg, with subbasal flap (Fig. 3C)";"short, without subbasal flap (cf. Dai 1999: fig. 225)";"short, without subbasal flap (cf. Dai 1999: fig. 139)";"short, without subbasal flap (cf. Zou et al. 2008: fig. 2)"