Poropuntius laoensis (Günther, 1868) Barbus laoensis Günther, 1868: 115. Type locality: Laos Moutains, Cochinchina. Holotype: BMNH 1862.7. 28.15. Poropuntius bantamensis (Rendahl, 1920): 1, fig. 1. Type locality: Thailand, Ban Tam, east of Doi Chieng Dao, pond fed by a subterranean stream. Holotype: NRM 10969. Poropuntius aluoiensis (Nguyen, 1997): 1, fig. 1. Type locality: Vietnam, Thua Thien Hue Province, A Luoi District, A Sap stream at Nham, Sekong basin, 16 ° 15 ' 32 " N, 107 ° 13 ' 31 " E. Holotype: HNUE V 1.1. 21. Notes. Our seven specimens of P. laoensis specimens (Fig. 3 D, E) were collected in the upper Xekong drainage of Central Vietnam, the type locality, i. e., in the Lao Mountains of Cochin-China, now Central Vietnam. Topotypic material of P. bantamensis and P. aluoiensis resembled P. laoensis in having the proximal half of the caudal fin orange and the distal half bright yellow, and bold black submarginal stripes on the caudal fin. Distribution. Poropuntius laoensis occurs in the Lower Salween, Chao Phraya, Lower Lancang, northern Annam, and Kratie-Stung Treng ecoregions.

Published as part of Hoang, Huy Duc, Pham, Hung Manh, Tran, Ngan Trong, Durand, Jean-Dominique, Wu, Ling, Pfeiffer, John, Chen, Xiao-Yong & Page, Lawrence M., 2024, Taxonomic revision of the Southeast Asian brook barb genus Poropuntius Smith, 1931 (Teleostei, Cyprinidae) with description of a new species from Vietnam, pp. 199-222 in ZooKeys 1204 on pages 199-222, DOI: 10.3897/zookeys.1204.120873