| Family: |
Crenuchidae (South American darters), subfamily: Characidiinae |
| Max. size: |
5.1 cm SL (male/unsexed) |
| Environment: |
benthopelagic; freshwater |
| Distribution: |
South America: known only from the type locality in the headwaters of Caraguatá River, upper Uruguay River drainage. |
| Diagnosis: |
Dorsal spines (total): 0-0; Dorsal soft rays (total): 11-13; Anal spines: 0-0; Anal soft rays: 7-9. Roundish black marks on the pelvic, dorsal and anal fins; a black band along the distal margin of anal and pelvic fins; a black band along the distal margin of anal and pelvic fins in adult males (band also present but fainter and narrower in juveniles and females); enlarged anal fin with rounded distal profile in adult males; fins brightly colored with orange or red chromatophores in live adult males; reduction of adipose fin, which may be very small or even absent; lateral line complete or at least extending well beyond the 12th scale of series. |
| Biology: |
In a small river at 650 m altitude. |
| IUCN Red List Status: |
Critically Endangered (CR); Date assessed: 07 November 2018 (B2ab(iii)) Ref. (130435)
|
| Threat to humans: |
harmless |
| Country info: |
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