Hypsolebias hamadryades sp. n. A live holotype, UFRJ 6893, male, 26.9 mm SL (caudal fin damaged and regenerated) B live paratype, UFRJ 6895, female, 21.2 mm SL. Photographs by WJEM Costa.

 
 
  Part of: Costa WJEM, Amorim PF, Mattos JLO (2018) Cryptic species diversity in the Hypsolebias magnificus complex, a clade of endangered seasonal killifishes from the São Francisco River basin, Brazilian Caatinga (Cyprinodontiformes, Aplocheilidae). ZooKeys 777: 141-158. https://doi.org/10.3897/zookeys.777.25058