19a. (From 17b.) Side of adults and juveniles with a distinct series of brown to black blotches (vertical oval), sometimes connected by thin, dark horizontal stripe; barbels appearing distinctly stellate under magnification.
Genus Erimystax

19b. (From 17b.) If pigment present on side of adults and juveniles then occurring only as scattered speckles or as a continuous stripe and not as distinct blotches; barbels smoothly tapering to point and not appearing stellate.

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