.,...- r^^^-f '^ t-f ., 206 



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rounded or squared off in dorsoventral profile. Gape small and gently curved near 

 rictus. Mouth weakly inferior, upper jaw extending slightly beyond lower, by a 

 distance equal to or slightly less than premaxillary tooth band. Teeth on 

 premaxillae short, setiform, in relatively narrow bands tapering gradually to comers 

 of mouth. Dentary tooth patches similar to those on premaxillae, slightly curved 

 upward at symphysis. Anterior nares at edge of upper lip, just lateral to mesethmoid 

 comua, directed forward. Posterior nares remote from anterior pair, encircled by 

 short, posteriorly directed flap of skin. Surface groove of fontanelle moderately 

 long (20-40% HL), the inside opening considerably shorter. Eyes moderately small 

 (15-21% HL) and sublateral. Gill membranes broadly connected to isthmus. 

 Branchiostegal rays 7-10, modally 9. First epibranchial with 7-10 long, crenulate gill 

 rakers in outer row; first ceratobranchial with 13-23 rakers; total number of gill 

 rakers on outside row of first arch 21-32. One or two pairs of very short chin barbels 

 in small specimens, reduced to tiny vestiges or completely absent in individuals 

 greater than about 50 mm SL. Maxillary barbel short and filiform, concealed in 

 rictal groove in females and nonbreeding males; maxillary barbels of nuptial male 

 long, reaching to or beyond front of eye, with about 7-14 sharp, antrorse odontodes 

 on dorsal margin. * 



Body moderately broad at pectoral-fin base, markedly compressed 

 posteriorly to caudal peduncle. Body depth relatively great at dorsal fin origin (18- 

 24% SL). Dorsal contour from dorsal fin to tail nearly straight to weakly convex. 

 Ventral profile from snout to anal-fin origin gently curved. 



Dorsal fin in all but nonbreeding males relatively short. Dorsal-fin spine 

 moderately robust and short (14-21% SL), weakly serrated along most of posterior 

 margin. Dorsal spine of nuptial males elongated and strongly serrated along entire 

 anterior margin, with from about 20 to 65 sharp, antrorse odontodes. Adipose small 

 and flap-like, free portion of posterior margin large. Caudal fin deeply forked, with 



