Figure 39 from: Páll-Gergely B, Hunyadi A, Ablett J, Văn Lương HV, Naggs F, Asami T (2015) Systematics of the family Plectopylidae in Vietnam with additional information on Chinese taxa (Gastropoda, Pulmonata, Stylommatophora). ZooKeys 473: 1-118. https://doi.org/10.3897/zookeys.473.8659

Figure 39 - Locations mentioned in literature on plectopylid taxonomy. 1 Muong-Bo 2 Phony-Tho 3 Trinh-Thuong 4 Muong-Hum 5 Nat-Son (Nhat Son) 6 Muong-Kong 7 Long-Ping 8 Pac-Kha 9 Ha-Giang 10 Tinh-Tuc 11 Cao-Bang 12 Déo-Ma-Phuc 13 Quang-Huyen 14 Ha-Lang 15 Cho-Ra 16 Bac-Khan 17 Nac-Ri 18 That-Khé 19 Cho-Moi 20 Lang-Son 21 Mansongebirge 22 Than-Moi 23 Bac-Ninh 24 Dong-Trieu 25 Bah-Mun 26 Kebao 27 Baie d'Along. The locations of "Col de Nuages" (Clouds Pass) could not be located. It is probably situated on Lao Kay Province, close to Muong-Hum.