Inhabits small mountain streams with bottom substrate basically composed by stones, sand and dead leaves; no aquatic vegetation in the area .
Dorsal spines (total): 0; Dorsal soft rays (total): 6 - 9; Anal spines: 0; Anal soft rays: 8 - 11. Diagnosis: both males and females are readily distinguished from Rivulus cylindraceus by the presence of a dark lateral band situated longitudinally along the lateral line, extended from the posterior margin of the eye to the base of the caudal fin; dorsal fin slightly shifted to the caudal peduncle in relation to the origin of anal fin (1–3mm) when compared to Rivulus cylindraceus; frontal scalation pattern in Rivulus berovidesi sp. n. is d-type vs. e-type pattern in Rivulus cylindraceus . : fusiform / normal.
Behavioural data for Rivulus Berovidesi is currently being reviewed.
Freshwater; benthopelagic; pH range: ? - 7.5; depth range 0 - 1 m . Tropical; ? - 24°C Central America: known only from Sierra de Cajalbana and Rio Camarones, Pinar del Rio province, Cuba (Ref.
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