| Family: |
Rivulidae (Rivulines), subfamily: Rivulinae |
| Max. size: |
3.31 cm SL (male/unsexed); 3.46 cm SL (female) |
| Environment: |
benthopelagic; freshwater; pH range: 5.6 |
| Distribution: |
South America: Formoso river floodplains, upper Corrente river drainage of the upper Paraná river basin in Brazil. |
| Diagnosis: |
Dorsal soft rays (total): 10-11; Anal soft rays: 13-15; Vertebrae: 30-30. Diagnosed from all congeners by the presence of red marks on flank arranged in chevron-like pattern with a branching on the upper portion forming Y-shaped red marks in males. Additional characters not unique but useful to distinguish from all congeners when combined include: flank intense greenish blue, to purplish blue above anal-fin base in males; red marks on flank arranged in chevron-like pattern; sub-basal red stripe on the dorsal fin absent in males; absence of black reticulation on head in females; absence of orange pigmentation on caudal fin in females; 29-31 scales in the longitudinal series; frontal squamation E-patterned; 31-33 caudal-fin rays; pre-dorsal length 75.1-79.5% SL in males; and anal-fin base 20.6-23.0% SL in males; 18.2-20.0% SL in females (Ref. 75995). |
| Biology: |
Inhabits open areas highly exposed to sunlight (Ref. 75995). |
| IUCN Red List Status: |
Not Evaluated (N.E.) Ref. (130435)
|
| Threat to humans: |
harmless |
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