| Callichthyidae (Callichthyid armored catfishes), subfamily: Corydoradinae |
| 3.96 cm SL (male/unsexed) |
|
demersal; freshwater |
| South America: Río Madre de Dios basin, Peru. |
|
Dorsal spines (total): 2-2; Dorsal soft rays (total): 7-8; Anal soft rays: 7-9. Corydoras knaacki is distinguished from its congeners by having the following combination of characters: a longitudinal black stripe along midline of flank; short mesethmoid, with anterior portion smaller than 50% of the bone length; serrations on posterior margin of pectoral spine directed towards the tip of the spine; dorsal fin with the region of the first branched ray, including membrane, with black pigmentation, the remaining areas with irregular black blotches; lacking a vertically elongated black blotch across the eyes; snout with conspicuously rounded moderately-developed black spots; and ventral expansion of infraorbital 1 moderately developed (Ref. 121196). |
|
|
Not Evaluated (N.E.) Ref. (130435)
|
| harmless |
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