Austrolebias charrua Costa & Cheffe, 2001
photo by Loureiro, M.

Family:  Rivulidae (Rivulines), subfamily: Cynolebiinae
Max. size:  4.72 cm SL (male/unsexed); 4.17 cm SL (female)
Environment:  benthopelagic; freshwater, non-migratory
Distribution:  South America: Laguna dos Patos basin in Brazil.
Diagnosis:  Dorsal spines (total): 0-0; Dorsal soft rays (total): 16-26; Anal spines: 0-0; Anal soft rays: 21-29; Vertebrae: 28-31. Two apomorphic color patterns, body bright gray with dark gray to black stripes in males (versus light gray or no stripes; stripes of equal size to, or wider than the light interspaces) and a vertically paired black blotch on caudal peduncle of juveniles and females (versus small spots irregularly arranged, or a single round dorsally positioned spot, or no spots on caudal peduncle). Scales on longitudinal series 28-30, supraorbital neuromasts 19-24, caudal fin rounded (fin rays 23-26), pharyngobranchial teeth 2-5. Dorsal fin origin anterior to anal fin origin in females.
Biology: 
IUCN Red List Status: Not Evaluated (N.E.) Ref. (130435)
Threat to humans:  harmless


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