Leptolebias opalescens Myers, 1942

Annual tropical killifish, Opalescent pearlfish



Taxonomy & Nomenclature

Synonym/s: Cynolebias opalescens Myers, 1942


Conservation Status

Last record: 1981

Rediscovered in 28 October 2012

IUCN RedList status: Vulnerable



South-eastern Brazil


Biology & Ecology










Original scientific description:

Myers, G. S. (1942). Studies on South American fresh-water fishes. Stanford Ichthyological Bulletin 2(4): 89-114.

Other references:

Costa, Wilson J. E. M. (2008). Monophyly and taxonomy of the Neotropical seasonal killifish genus Leptolebias (Teleostei: Aplocheiloidei: Rivulidae), with the description of a new genus. Zoological Journal of the Linnean Society 153: 147-160.

Costa, Wilson J. E. M. (2013). Leptolebias opalescens, a supposedly extinct seasonal killifish from the Atlantic Forest of south-eastern Brazil, rediscovered 31 years after its last record (Cyprinodontiformes: Rivulidae). Ichthyol. Explor. Freshwaters 23(4): 357-358. [online PDF omits most references]

Guedes, Gustavo H. S., Salgado, Fernando L. K., Uehara, Wagner, Ferreira, Débora L. de Pavia and Araújo, Francisco G. (2020). The recapture of Leptopanchax opalescens (Aplocheiloidei: Rivulidae), a critically endangered seasonal killifish: habitat and aspects of population structure. Zoologia 37: 1-8.

World Conservation Monitoring Centre. (1996). Leptolebias opalescens. In: IUCN 2013. IUCN Red List of Threatened Species. Version 2013.1. ( Downloaded on 27 July 2013.


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