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aqua 6(4)_Simpsonichthys cholopteryx

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SINGLE PAPER

Volume 6, Issue 4 – March 2003

Wilson J. E. M. Costa, Cristiano R. Moreira and Flávio C. T. Lima: Simpsonichthys cholopteryx n. sp. (Cyprinodontiformes: Rivulidae: Cynolebiatinae):  a new dwarf annual fish from the upper Rio Araguaia basin, central Brazil, pp. 139-144

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Description

SINGLE PAPER

Volume 6, Issue 4 – March 2003

Wilson J. E. M. Costa, Cristiano R. Moreira and Flávio C. T. Lima: Simpsonichthys cholopteryx n. sp. (Cyprinodontiformes: Rivulidae: Cynolebiatinae):  a new dwarf annual fish from the upper Rio Araguaia basin, central Brazil, pp. 139-144

Abstract
Simpsonichthys cholopteryx n. sp., collected in the upper Rio Araguaia basin, central Brazil, is described. It belongs to a clade that includes S. boitonei and S. parallelus, diagnosed by the absence of pelvic fin and girdle. The new species is considered to be a sister group to S. parallelus, both sharing apomorphic colour patterns of the caudal fin and iris in males, small adult size and absence of teeth on the second pharyngobranchial. It differs from S. boitonei and S. parallelus in the colour patterns of the flank and unpaired fins in males, and by having more anal fin rays in females.

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