P. crenula ^ZBK:

ZRC 46317 (holotype), 125.2 mm SL; CMK 14895 (2 paratypes), 59.0- 80.0 mm SL; Vietnam: Quang Ninh, Hai Ninh district, torrent at km 5 on road from Bac Phong Sinh to Mong Cai, 21°35'31"N 107°43'52"E .