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aqua 19(3)_Spectrolebias pilleti

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SINGLE PAPER

Volume 19, Issue 3 – 19 July 2013

Dalton Tavares Bressane Nielsen and Roger Brousseau: Spectrolebias pilleti, a new annual Killifish (Cyprinodontiformes: Rivulidae: Cynolebiatinae) from the upper río Mamoré basin, Bolivia, pp. 115-122

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Description

SINGLE PAPER

Volume 19, Issue 3 – 19 July 2013

Dalton Tavares Bressane Nielsen and Roger Brousseau: Spectrolebias pilleti, a new annual Killifish (Cyprinodontiformes: Rivulidae: Cynolebiatinae) from the upper río Mamoré basin, Bolivia, pp. 115-122

Abstract
Spectrolebias pilleti n. sp. is described from a temporary pool from the upper río Mamoré basin, Departamento Santa Cruz, Quimone city, Bolivia. The new species is distinguished from all congeners by the unique color pattern of males: 3 to 5 vertical blue bars alternating with a light reddish brown background in males (vs. absence of bars), by the presence of an iridescent blue spot on the flank in female (vs. presence of one or more black spots), by the absence of filaments at the tips of dorsal fin and anal fin in males, except Spectrolebias reticulatus (vs. long filaments on dorsal and anal fins in S. brousseaui and S. filamentosus, filaments on the dorsal fins of S. semiocellatus and S. inaequipinnatus, or filaments in the anal fins of S. chacoensis) and by the presence of scales covering the base of anal fin in males (vs. absence of these scales in the remaining congeners). Also distinguished from all congeners, with the exception of S. reticulatus, by the position of the dorsal fin, which has its origin anterior to the origin of the anal fin in males.

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