| Family: |
Rivulidae (Rivulines), subfamily: Cynolebiinae |
| Max. size: |
4.93 cm SL (male/unsexed); 3.86 cm SL (female) |
| Environment: |
benthopelagic; freshwater |
| Distribution: |
South America: Paramirim River drainage, São Francisco River basin in Brazil. |
| Diagnosis: |
Dorsal soft rays (total): 16-18; Anal soft rays: 19-22; Vertebrae: 34-35. Cynolebias obscurus differs from all other species of the C. porosus group by the possession of the following characters: distal portion of anal-fin rays grey in males (vs. red); white dots concentrated on middle of flank in males (vs. about equally arranged in the whole flank); basihyal width about 50-55% of length (vs. about 65-70%); ventral process of autopalatine absent (vs. present) (Ref. 97357). |
| Biology: |
Occurs in vestigial small pools, measuring about 3 m wide and extending close and parallel to the road for about 1 km. The whole area around the pool is composed of plantation, without any vestige of the original habitat. Sympatric with Hypsolebias macaubensis (Ref. 97357). |
| IUCN Red List Status: |
Critically Endangered (CR); Date assessed: 03 February 2021 (B1ab(iii)+2ab(iii)) Ref. (130435)
|
| Threat to humans: |
harmless |
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