Taxonomy and phylogenetic relationships among species of the
seasonal, internally inseminating, South American killifish genus
Campellolebias (Teleostei: Cyprinodontiformes: Rivulidae), with
the description of a new species|
WILSON J. E. M. COSTA
Campellolebias, a genus of South American annual killifishes, is diagnosed by a unique specialized structure, the pseudogonopodium, on the anterior part of the anal fin in males, which is used for internal insemination; a derived caudal skeleton morphology; an apomorphic color pattern on the ventral portion of the head in males; and a unique courtship behavior pattern in males. Four species are included, all endemic to Brazilís southern coastal plains: C. dorsimaculatus and C. intermedius n. sp., from the rio Ribeira de Iguape basin, S„o Paulo; C. chrysolineatus, from northern Santa Catarina; and C. brucei, from southern Santa Catarina. A clade comprising C. intermedius, C. chrysolineatus and C. brucei is defined by the pelvic-fin bases medially separated by a short interspace, seven longitudinal rows of iridescent marks on the flank in males, and dark horizontal lines between flank scales on females. A clade comprising C. chrysolineatus and C. brucei is diagnosed by long dorsal, anal and pelvic fins in males.
Keywords: Killifishes, Cyprinodontiformes, Rivulidae, Campellolebias, Neotropica, Atlantic forest, internal insemination, morphology, phylogenetic relationships
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