We redescribe Strandesia tolimensis Roessler, 1990, originally described from Colombia, and describe three new species, Strandesia lansactohai n. sp., S. velhoi n. sp. and S. nupelia n. sp. from lakes, channels and rivers in the alluvial valley of the upper Paraná River. Mainly valve morphology and shape and size of the attachment of the caudal ramus are used to characterize these species, as other soft parts are uninformative. All populations studied here are parthenogenetic, so male morphologies are not available.
Sequences of the mitochondrial COI-gene are used to construct a phylogeny, as well as a genetic network of specimens, and in both analyses the four species are well-supported. In addition, we also delimit the four species with genetic distances using Birky’s K/θ method and conclude that it supports the identity of the species under consideration.
Nous redécrivons Strandesia tolimensis Roessler, 1990, originalement décrite de la Colombie, et nous décrivons trois nouvelles espèces: Strandesia lansactohai n. sp., S. velhoi n. sp. et S. nupelia n. sp. des lacs, des canaux et des rivières dans la vallée alluviale du fleuve Haut-Paraná. Surtout la morphologie des valves, ainsi que la forme et la taille de l’attache de la rame caudale sont utilisées pour caractériser ces espèces, puisque les autres parties molles sont non-informatives. Toutes les populations étudiées ici sont parthénogénétiques, par conséquent les morphologies mâles ne sont pas disponibles.
Des séquences du gène COI mitochondrial sont utilisées afin de construire une phylogénie, ainsi qu’un réseau génétique de spécimens, et dans les deux analyses, les quatres espèces sont bien supportées. En outre, nous délimitons aussi les quatres espèces à l’aide de distances génétiques utilisant la méthode Birky K/θ, et nous concluons que cette dernière analyse supporte également l’identité des espèces étudiées.
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We redescribe Strandesia tolimensis Roessler, 1990, originally described from Colombia, and describe three new species, Strandesia lansactohai n. sp., S. velhoi n. sp. and S. nupelia n. sp. from lakes, channels and rivers in the alluvial valley of the upper Paraná River. Mainly valve morphology and shape and size of the attachment of the caudal ramus are used to characterize these species, as other soft parts are uninformative. All populations studied here are parthenogenetic, so male morphologies are not available.
Sequences of the mitochondrial COI-gene are used to construct a phylogeny, as well as a genetic network of specimens, and in both analyses the four species are well-supported. In addition, we also delimit the four species with genetic distances using Birky’s K/θ method and conclude that it supports the identity of the species under consideration.
Nous redécrivons Strandesia tolimensis Roessler, 1990, originalement décrite de la Colombie, et nous décrivons trois nouvelles espèces: Strandesia lansactohai n. sp., S. velhoi n. sp. et S. nupelia n. sp. des lacs, des canaux et des rivières dans la vallée alluviale du fleuve Haut-Paraná. Surtout la morphologie des valves, ainsi que la forme et la taille de l’attache de la rame caudale sont utilisées pour caractériser ces espèces, puisque les autres parties molles sont non-informatives. Toutes les populations étudiées ici sont parthénogénétiques, par conséquent les morphologies mâles ne sont pas disponibles.
Des séquences du gène COI mitochondrial sont utilisées afin de construire une phylogénie, ainsi qu’un réseau génétique de spécimens, et dans les deux analyses, les quatres espèces sont bien supportées. En outre, nous délimitons aussi les quatres espèces à l’aide de distances génétiques utilisant la méthode Birky K/θ, et nous concluons que cette dernière analyse supporte également l’identité des espèces étudiées.
All Time | Past Year | Past 30 Days | |
---|---|---|---|
Abstract Views | 461 | 72 | 18 |
Full Text Views | 223 | 1 | 0 |
PDF Views & Downloads | 19 | 5 | 0 |