Cyclopoida species from the Neotropics are listed and their distributions are commented. The results showed 148 species in the Neotropics, where 83 species were recorded in the northern region (above upon Equator) and 110 species in the southern region (below the Equator). Species richness and endemism are related more to the number of specialists than to environmental complexity. New researche...

The aim of this work is clarify the identification of Mesocyclops ogunnus that occur in several reservoirs in the State of São Paulo and that was previously identified as Mesocyclops kieferi. These two species are closely related species with very similar characteristics. The differential characteristics are presented and the distribution of both species in the world is discussed.

The present paper aims to describe the spatial distribution of zooplankton copepods, their biomass and instantaneous secondary production, in Barra Bonita, a large eutrophic, polymitic reservoir (22 degrees 29' S and 48 degrees 34' W) on the Tietê River, of the Paraná basin. Sampling was carried out during two seasons: dry winter and rainy summer. Species composition, age structure and numerica...

Species of Oithona (Copepoda, Cyclopoida) are highly abundant, ecologically important, and widely distributed throughout the world oceans. Although there are valid and detailed descriptions of the species, routine species identifications remain challenging due to their small size, subtle morphological diagnostic traits, and the description of geographic forms or varieties. This study examined t...

Calanoida have the highest number of species among Copepoda in marine plankton, but not fresh water, where greatest are Cyclopoida. Freshwater Cyclopoida also live more freshwater sites than Calanoida. This could be a consequence an invasion by before Similar to Cyclopoida, different from Calanoida, females produce egg sacs and care for eggs. strategy is common all suggesting that evolution par...

A new species of the endoparasitic copepod Enterognathus (Cyclopoida, Enterognathidae) is described from a crinoid host in the Seto Inland Sea, western Japan. This is a third species of the genus and its first occurrence in the Pacific Ocean. The new species is distinguished from two previously known congeners by the morphology of the body somites, caudal rami, antennae and legs. Crinoid parasi...

The aim of this note is to record the occurrence of the copepod Cyclopoida Thermocyclops tenuis in the Pantanal region, Central West of Brazil. The sampling was carried out in September, 2008, in a small artificial pond with an area of 22 m and 0.5 m deep, located in the city of Corumbá, MS, at 19° 00” 02’ S and 57° 37” 50’ W. The material was concentrated in a plankton net with 68 μm mesh size...

Since the first description of Marteilia refringens (Paramyxea) in flat oysters Ostrea edulis in 1968 in the Aber Wrach, Brittany (France), the life-cycle of this parasite has remained unknown. However, recent studies, conducted in the 'claire' system, have proposed the planktonic copepod Acartia grani as a potential intermediate host for the parasite. Nevertheless, experimental transmission of...

Despite the key role of zooplankton communities in regulating water quality lentic ecosystems, they are absent from list biological elements Water Framework Directive (WFD) for assessment ecological status. Based on this, present work was a case study that aimed to understand relevance as bioindicator classifying reservoirs. For one year and each season, Torrão reservoir assessed using mandator...