Abstract
The ostracode assemblages from Cananéia-Iguape estuarine/lagoon system (southernmost State of São Paulo) are here discussed in detail for the first time. Thirty-four sites, approximately 1 km equidistant, were sampled along the system, including the Cananéia Sea, Pequeno Sea, Cubatão Sea, Ribeira de Iguape River and Itapitangui River. The ostracodes throughout this area have poor assemblages, with a total of 662 specimens of dead and living organisms. The majority of the ostracode fauna is composed of euryhaline species, as follows: Cyprideis multidentata Hartmann, 1955 (174 specimens), Minicythere heinii Ornellas, 1974 (54 specimens), Tanella gracilis Kingma, 1948 (96 specimens) and Whatleyella sanguinettiae Coimbra, Carreño & Ferron, 1994 (226 specimens). Although there are few studies on the Brazilian mixohaline ostracode faunas, including the euryhaline marginal marine taxa, the published data show that the group is best known in the south and southeast regions. Based on this review and with the new data presented in this paper, the geographical distribution of eight mixohaline key species in southern and southeastern Brazil is also discussed.
Highlights
The Brazilian coast exhibits different types of paralic environments: linear and small estuaries, complex estuarine-lagoon systems, close or open lagoons, large tide-plains, swamps and deltas
The present paper represents a contribution to the knowledge of the Brazilian mixohaline Ostracoda, and in particular those assemblages living in the CananéiaIguape esturine/lagoon system in the southern State of São Paulo, reported here for the first time
The first ecological approach of Brazilian Ostracoda populations from transitional environments was on living mixohaline Ostracoda from the channel from the estuarine/lagoon system of Tramandaí (State of Rio Grande do Sul) to the Atlantic Ocean (ORNELLAS, 1974)
Summary
The Brazilian coast exhibits different types of paralic environments: linear and small estuaries, complex estuarine-lagoon systems, close or open lagoons, large tide-plains, swamps and deltas These coastal ecosystems are inhabited by important groups of benthic invertebrates, ostracodes being among the most common and abundant. The first ecological approach of Brazilian Ostracoda populations from transitional environments was on living mixohaline Ostracoda from the channel from the estuarine/lagoon system of Tramandaí (State of Rio Grande do Sul) to the Atlantic Ocean (ORNELLAS, 1974). This association is dominated by Cyprideis spp., Perissocytheridea kroemmelbeini Pinto & Ornellas, 1970, Cytherura sp., and Minicythere heinii Ornellas, 1974. Is important to note that empty carapaces and valves of marine ostracodes, in particular of Cytheretta punctata Sanguinetti, 1979, have been recorded at Tramandaí, Patos Lagoon and Laguna town
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