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22 December 2020 Revalidation and redescription of Moenkhausia madeirae Fowler from the rio Madeira basin in Brazil and Bolivia (Characiformes: Characidae)
Flávio C. T. Lima, Tiago C. Faria, Willian M. Ohara, Bruno S. F. Barros
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Abstract

Based on the examination of type and recently collected specimens, Moenkhausia lepidura madeirae Fowler is resurrected from the synonymy of M. intermedia and redescribed as a valid species. Moenkhausia madeirae can be diagnosed from all congeners by the following combination of characters: presence of two symmetrical dark blotches on caudal fin (one on each lobe), a conspicuous humeral blotch, 18-22 branched anal-fin rays, and mature males with two (rarely three) well-developed hooks on the last simple and first branched anal-fin rays, respectively. The species occurs in the middle and upper rio Madeira basin in Brazil and Bolivia. Comparisons are made with the other species of Moenkhausia presenting symmetrical dark blotches on the caudal-fin lobes, i.e., M. barbouri, M. bonita, M. dichroura, and M. intermedia.

©2020 by the Academy of Natural Sciences of Drexel University
Flávio C. T. Lima, Tiago C. Faria, Willian M. Ohara, and Bruno S. F. Barros "Revalidation and redescription of Moenkhausia madeirae Fowler from the rio Madeira basin in Brazil and Bolivia (Characiformes: Characidae)," Proceedings of the Academy of Natural Sciences of Philadelphia 167(1), 167-178, (22 December 2020). https://doi.org/10.1635/053.167.0109
Received: 19 October 2020; Accepted: 4 December 2020; Published: 22 December 2020
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KEYWORDS
Amazon Basin
bacia amazônica
Moenkhausia bonita
Moenkhausia dichroura
Moenkhausia intermedia
Stethaprioninae
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