| 1a |
No median barbel at tip of snout; 2-4 short (less than
pupil diameter) barbels under
head; oculoscapular canal with pore F only; first gill
slit partly closed ventrally by a
membrane to inner gill cover; body with large spots; D2
with 11-12 elements, anal
with 10(9-11)..................................................................................................
pantherinus
|
| 1b |
A median barbel at tip of snout;
a lateral canal pore above operculum; D2 - 10;
anal - 9; ................................................................................................................................
2 |
| 2a |
Barbel short about ½ eye diameter or less; a
single barbel between eye and
posterior margin of mouth............................................................................ceuthoecus
|
| 2b |
Barbel equal to or greater than eye diameter; two barbels
between eye and
posterior margin of mouth; 6-8 long (about eye diameter)
barbels under head;
oculoscapular canal with pores F and H; first gill slit
completely open; body distinctly
barred; D2 with 9-10 elements, anal with 8-9...............................................
mexicanus
|
