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head wide, body shorttop lip narrow
incisors compressed, lower serratedsucker small, papillae patches: front, center, rearlower ~5 pectoral rays smaller
pectoral base - small pad -
head widetop lip wide, wider in center
incisors roundedsucker large, papillae patches: front, center (0-2), rearpectoral base - small pad -
wide headtop lip wide, wider in centersucker large, papilla patches: front, sides, rear, 2 (close-set) centralpectoral base: large fleshy pad
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head narrowtop lip wide, wider in centersucker large, papilla patches: front, center (V-shaped), rearpectoral base - small pad
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head broadtop lip wide, wider in centersucker papilla patches: front, sides, rear, 2 (wide-spaced) centralpectoral base: large pad