On the Strandesia obtusata/elliptica lineage (Ostracoda, Cyprididae) in the alluvial valley of the upper Paraná River (Brazil), with the description of three new species

Abstract

We redescribe Strandesia toUmensis Roessler, 1990, originally described from Colombia, and describe three new species, Strandesia lansactohai n. sp., 5. 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 KI9 method and conclude that it supports the identity of the species under consideration. RESUME 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

Periphytic community structure of Ostracoda (Crustacea) in the river-floodplain system of the Upper Paraná River

“…Gamma diversity of freshwater ostracods was comparatively high in the river-floodplain system of the Upper Paraná River, as 44 species were recorded, compared to 48 species found in other studies about diversities of ostracods in this floodplain (Higuti et al, 2010(Higuti et al, , 2013. Sampling efforts appear to be suitable to reveal the diversity of ostracods, because of similar values amongst expected and observed estimators, while all richness estimators have already reached an asymptote.…”

“…¼ of the samples were quantified and the remaining 3/4 were used to identify species that were absent from the first subsample. Ostracods were sorted under a stereoscopic microscope and the organisms were identified following Martens & Behen (1994) and articles comprised therein, Rossetti & Martens (1998), Higuti & Martens (2012a, b, 2014, Higuti et al (2013).…”

Checklist de ostrácodes (Crustacea, Ostracoda) dulcícolas do Pantanal Sul Mato-grossense, Brasil

“…Além disso, deve-se considerar a importância do monitoramento anual. Higuti et al (2013) utilizaram pela primeira vez análise molecular para resolver problemas taxonômicos sobre os ostrácodes brasileiros. Recomenda-se fortemente que tais métodos sejam mais utilizados, como estes podem confirmar espécies morfológicas e revelar o potencial da diversidade críptica (Bode et al, 2010).…”

“…Martens et al (1998) relataram apenas 96 espécies descritas em 32 gêneros em nosso país. As recentes adições à fauna brasileira de ostrácodes realizadas nos estados do Rio Grande do Sul (Würdig & Pinto, 2001); São Paulo (Pinto et al, 2003(Pinto et al, , 2004(Pinto et al, , 2005a(Pinto et al, ,b, 2008 e Paraná/Mato Grosso do Sul (Higuti et al, 2009a;Higuti & Martens, 2012a, b, 2014, Higuti et al, 2013 elevaram esse número para 117 espécies em 37 gêneros. No entanto, novos gêneros e novas espécies ainda aguardam descrições nos diferentes ambientes (Higuti, 2006;Pinto, 2007;Higuti et al, 2009bHiguti et al, , 2010.…”

Five new species of Candoninae (Crustacea, Ostracoda) from the alluvial valley of the Upper Paraná River (Brazil, South America)

“…Close to 300 of these species have been described and reported from South America and more than 100 species are now known from Brazil (Martens & Behen 1994;Higuti et al 2009aHiguti et al , 2013Higuti & Martens 2012a, 2012b. Recent work on the alluvial valley of the Upper Paraná River (Higuti et al 2007(Higuti et al , 2009b(Higuti et al , 2009cMormul et al 2010) has contributed significantly to the general knowledge of ecology and biogeography of Brazilian freshwater ostracods, especially those occurring in the pleuston of floating plants.…”