| Family: |
Rivulidae (Rivulines), subfamily: Cynolebiinae |
| Max. size: |
4.57 cm SL (male/unsexed); 3.36 cm SL (female) |
| Environment: |
benthopelagic; freshwater |
| Distribution: |
South America: Catimbau river floodplain, Saquarema lagoon system in Brazil. |
| Diagnosis: |
Dorsal soft rays (total): 13-18; Anal soft rays: 20-24; Vertebrae: 31-32. This species is similar to Nematolebias papilliferus and distinguished from N. whitei by having long narrow golden lines on the distal portion of the dorsal fin in males (vs. dots). It differs from N. papilliferus by its distinct row of small iridescent spots on the distal margin of the caudal fin in males (vs. row absent); and from both N. papilliferus and N. whitei by its pelvic-fin bases medially separated by a small interspace (vs. in contact) (Ref. 95536).
Description: dorsal-fin rays 16-18 in males, 13-15 in females; anal-fin rays 23-24 in males, 20-22 in females; pectoral-fin rays 14-15 in males; 13-14 in females; pelvic-fin rays 6 in both sexes; caudal fin rounded; longitudinal series of scales 29-31; and transverse series of scales 7-8 (Ref. 95536). |
| Biology: |
Always occurs in shallow temporary pools, about 30-50 cm deep, formed during the rainy season, usually between March and May, and between October and December. These pools were in open vegetation area (Ref. 95536) |
| IUCN Red List Status: |
Critically Endangered (CR); Date assessed: 07 November 2018 (B1ab(i,ii,iii,iv,v)+2ab(i,ii,iii,iv,v)) Ref. (130435)
|
| Threat to humans: |
harmless |
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