Nothobranchius insularis sp. n.: A.MRAC A7-02-P-33, holotype, male, 52.9 mm SL; Tanzania: 3 km S of Kirongwe, Mafia Island; B.MRAC A7-02-P-38-44, paratype, male, 48.3 mm SL; Tanzania: 0.5 km S of Kirongwe, Mafia Island; C.MRAC A7-02-P-38-44, paratype, female, 49.8 mm SL; Tanzania: 0.5 km S of Kirongwe, Mafia Island.

 
 
  Part of: Costa WJEM (2017) Redescription of Nothobranchius lucius and description of a new species from Mafia Island, eastern Tanzania (Cyprinodontiformes, Aplocheilidae). Zoosystematics and Evolution 93(1): 35-44. https://doi.org/10.3897/zse.93.11041