Poropuntius krempfi (Pellegrin & Chevey, 1934)

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, ZooKeys 1204, pp. 199-222 : 199-222

Poropuntius krempfi (Pellegrin & Chevey, 1934)

Barbus (Lissochilichthys) krempfi Pellegrin & Chevey, 1934: 339 . Type locality: Vietnam, Tonkin, Ngoi-Thia River at Nghia Lô , tributary of Red River upstream of Yên Bay. Holotype: MNHN 1934-0262 .

Barbus (Puntius) annamensis Pellegrin & Chevey, 1936: 225 , fig. 3. Type locality: Vietnam, Annam, Qu ảng Nam, Hàn Giang . Holotype: MNHN 1935-0337 .

Lissochilus macrosquamatus Mai, 1978: 99, fig. 42. Type locality: northern Vietnam. Syntypes: DVZUT.

Notes.

Specimens of Poropuntius krempfi (Fig. 3 A, B ) were recovered in a clade including topotypic material of Barbus annamensis and Lissochilus macrosquamatus . The clade was sister to a large clade including P. alloiopleurus , P. heterolepidotus , P. huangchuchieni , P. laoensis , and P. opisthopterus (Fig. 2 A ).

Specimens of P. krempfi from northern Annam ( MNHN 1935: 0337, MNHN 1969: 42) were assigned by Rainboth (1996) to Hypsibarbus annamensis presumably due to the presence of a few tiny tubercles on the tip of the snout, but this trait is not useful for separating all species of the two genera. Some of our 41 specimens of P. krempfi have tiny tubercles on the tip of the snout. Rainboth (1996) noted that this species was unusual in being the only species of Hypsibarbus on the coastal side of the Annam Cordillera and in having a much longer dorsal spine with 26–28 serrations, compared to 20 or fewer in other species in the Mekong River drainage.

Hypsibarbus macrosquamatus from Song Hong, northern Vietnam (type: DVZUT) described by Mai (1978) and treated as Acrossocheilus macrosquamatus by Nguy ễn and Ngô (2001) resembles our P. krempfi specimens from northern Annam with a lateral-line scale count of 29–33.

Distribution.

Poropuntius krempfi is found in the Song Hong and northern Annam ecoregions.

Figures

Figure 2. Maximum-likelihood tree based on (A) COI and (B) Cyt b mitochondrial gene sequences for species of Poropuntius. Numbers on branches are ML bootstrap values (values > 50 % shown). Bold sample labels are sequences from type localities. Blue sample labels in the Cyt b tree are sequences from Wu et al. (2013). Colours of clades correspond to the freshwater ecoregions in Fig. 1.

Figure 3. Species of Poropuntius. Poropuntius krempfi from A Song Hong ecoregion, UNS 2018-1410 B northern Annam, UNS 2018-2702; P. alloiopleurus from C Song Hong, UNS 2018-3010; P. laoensis from D upper Sekong’s tributary, UNS 2018-0404 E upper Sekong’s pool, UNS 2018-0304; P. huangchuchieni from F Lower Lancang, UNS 2018-0711. All photographed in life. Scale bars: 10 mm.