| Family: |
Callichthyidae (Callichthyid armored catfishes), subfamily: Corydoradinae |
| Max. size: |
3.96 cm SL (male/unsexed) |
| Environment: |
demersal; freshwater |
| Distribution: |
South America: Río Madre de Dios basin, Peru. |
| Diagnosis: |
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). |
| Biology: |
|
| IUCN Red List Status: |
Not Evaluated (N.E.) Ref. (130435)
|
| Threat to humans: |
harmless |
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