Oreonectes platycephalus Gnther

Du, Li-Na, Chen, Xiao-Yong & Yang, Jun-Xing, 2008, A review of the Nemacheilinae genus Oreonectes Günther with descriptions of two new species (Teleostei: Balitoridae), Zootaxa 1729, pp. 23-36 : 29-30

Oreonectes platycephalus Gnther

Fig. 5

Oreonectes platycephalus Gnther, 1868 , Catalog Fishes British Museum 7: 369 (small stream near top of Hongkong Moutains, China); Zheng, 1981, Freshwater Fishes of Guangxi: 162; Zheng, 1989, The Fishes of Pearl River: 46 (Jinxiu, Guangxi, China); Zhu, 1989, The Loaches of the Subfamily Nemacheilinae in China: 23 (Fuluo Mountain, Kwangtung, Jinxiu, Guangxi, China); Kottelat, 2001, Freshwater Fishes of Northern Vietnam: 46 (Quang Ninh Province, Vietnam).

Homaloptera rotundicauda Martens, 1868 , Monatsb. Akad. Wiss. Berlin: 608 ( Hong Kong, China)

Oreonectes yenlingi Lin, 1932 , Lingnan Sci.J.Canton 11(3): 380 (White Cloud Mountain, Kwangtung, China)

Material examined: 25 ex. KIZ 200304597–600, 50.9–58.6 mm SL, 63.5–72.5 mm TL; KIZ 200304226, 49.2 mm SL, 60.7 mm TL; KIZ 200304009, 64.7 mm SL, 76.5 mm TL; KIZ 200304410–411, 59.8–67.8 mm SL, 75.3–83.6 mm TL; KIZ 200304434–440, 39.8–52.1 mm SL, 48.8–64.8 mm TL; KIZ 2003041136–1137, 66.7– 66.8 mm SL, 79.4–83.3 mm TL; KIZ 200510215034, 48.5 mm SL, 59.6 mm TL; KIZ 200510193741, 43.7 mm SL, 55.8 mm TL; KIZ 200510266401, 49.1 mm SL, 60.7 mm TL; KIZ 200510235472–5474, 57.4–70.6 mm SL, 69.3–86.8 mm TL; KIZ 20051016672–673, 54.4–60.6 mm SL, 66.9–73.8 mm TL, from Jinxiu County, Guangxi Zhuang Antonomous Region, China.

Diagnosis: Dorsum of head flat; eyes present; dorsal-fin origin posterior to pelvic-fin origin; dorsal-fin base and caudal-fin base with black pigment; caudal fin rounded; body covered with minute scales except for head; lateral line incomplete, with 16-18 pores; cephalic lateral-line system with 8 supraorbital, 3+10 infraorbital pores; sexual dimorphism, males have the genital papilla located immediately posterior to anus; gonad opens at end of fleshy prominence; vertebra 4+31~32 (3).

Distribution: Hong Kong, China; Fuluo Mountain and White Cloud Mountain, Kwangtung, China; Jinxiu County, Guangxi Zhuang Autonomous Region, China; Quang Ninh Province, Vietnam.

Remark: This species has a broad distribution, especially within Jinxiu County, Guangxi. For example, it can be found in Jinxiu River, Puquan River, Gufan River, Changdong River, Tongmu River, Jiajiang River and Guman River ( Fig. 6).

Figures

FIGURE 5. Oreonectes platycephalus (KIZ 200304599, 58.6 mm SL) lateral view.