Pareuchiloglanis

Li, Xu, Zhou, Wei, Thomson, Alfred W., Zhang, Qing & Yang, Ying, 2007, A review of the genus Pareuchiloglanis (Sisoridae) from the Lancangjiang (upper Mekong River) with descriptions of two new species from Yunnan, China, Zootaxa 1440, pp. 1-19 : 17-18

Key to the species of Pareuchiloglanis in the Lancangjiang, China

1 Premaxillary tooth patches appear joined, with shallow median indentation ( Fig. 2 A); no sulcus between maxillary barbel and lower lip ( Fig. 3 A).................................................................................................... 2

- Premaxillary tooth patches separate ( Fig. 2 B); sulcus present between maxillary barbel and lower lip ( Fig. 3 B) ................................................................................................................. Pareuchiloglanis kamengensis

2 Origin of anal fin posterior, inserted nearer to caudal-fin base than to end of pelvic-fin base; tip of dorsal fin not reaching origin of adipose fin when depressed; pectoral fin not reaching origin of pelvic fin; pelvic

fin not reaching or only reaching anus ....................................................................................................... 3 - Origin of anal fin anterior, distance to caudal-fin base longer than to pelvic-fin origin; tip of dorsal fin reaching origin of adipose fin when depressed; pectoral fin extending beyond origin of pelvic fin; pelvic fin extending beyond anus............................................................................. Pareuchiloglanis abbreviatus 3 Branched rays of caudal fin 7+8; anus midway between posterior end of pelvic-fin base and anal-fin origin or nearer to anal-fin origin.................................................................................................................... 4

- Branched rays of caudal fin 6+7; anus nearer to posterior end of pelvic-fin base than to anal-fin origin ... .................................................................................................................... Pareuchiloglanis prolixdorsalis

4 Caudal peduncle slender, depth 16.6–30.1% in length; pelvic fin reaching anus; anus located midway between end of pelvic-fin base and anal-fin origin .................................. Pareuchiloglanis gracilicaudata

- Caudal peduncle deeper, depth 30.3% in length; pelvic fin not reaching anus; anus nearer to anal-fin origin than to posterior end of pelvic-fin base .................................................... Pareuchiloglanis myzostoma

Figures

FIGURE 2. Ventral view of premaxillary tooth band. A, premaxillary tooth patches appear joined with a shallow median indentation (Pareuchiloglanis gracilicaudata, SWFC 0 0 0 4052, 110 mm SL); B, premaxillary tooth patches appear separate with a deep median indentation (Pareuchiloglanis kamengensis SWFC 0 411001, 149 mm SL); C, premaxillary tooth patches separate (Oreoglanis setiger, SWFC 0 411019, 94.4 mm SL).

FIGURE 3. Ventral view of maxillary barbel and lower lip. A, maxillary barbel and lower lip connected directly (Pareuchiloglanis gracilicaudata, SWFC 0 0 0 4052, 110 mm SL); B & C, maxillary barbel and the lower lip interrupted by an obvious sulcus (s) (B, Pareuchiloglanis kamengensis, SWFC 0 411001, 149 mm SL; C, Oreoglanis setiger, SWFC 0 411019, 94.4 mm SL).