Ana Verdi

Universidad de la República de Uruguay | UdelaR · Faculty of Sciences

Hyalella is a genus of epigean freshwater amphipods endemic to the Americas. The study of morphological characters alone has traditionally dominated the description of new species. Recently, molecular systematics tools have contributed to identifying many cryptic species and a high level of convergent evolution in species complexes from North Ameri...

The megafauna of deep continental margin of the exclusive economic zone (EEZ) of Uruguay have been little studied. The present study includes deep-sea trawling operations and represents the first analysis in detail of the deep-sea community of decapod crustaceans. Cluster analysis of bottom trawl data indicated that benthic megafauna are grouped in...

The amphipod Apocorophium acutum (Chevreux, 1908) has a worldwide distribution due to dispersion by ballast water and the hulls of ships. Here we provide a record of this species from Rocha department, Uruguay, which is the first record in the Atlantic South American coast. This record is 5,400 km from the nearest previously known record in Venezue...

The amphipod Apocorophium acutum (Chevreux, 1908) has a worldwide distribution due to dispersion by ballast water and the hulls of ships. Here we provide a record of this species from Rocha department, Uruguay, which is the first record in the Atlantic South American coast. This record is 5,400 km from the nearest previously known record in Venezue...

The structure and diversity of terrestrial isopod communities are described and compared in natural and labored environments. Samples collected by hand from July 2010 to June 2011 at the San José Department, Uruguay. As a result, 4 species belonging to 3 families and 3 genera were identified: Armadillidium vulgare (Latreille, 1804), Armadillidium n...

Armadillidium vulgare (Latreille, 1884) and Armadillidium nasatum (Schultz, 1961) are among the most common species of terrestrial isopods in Uruguay. The reproductive pattern of these species was studied, for first time, on a natural population at Department of San Jose (Uruguay) from June 2010 to July 2011. A total of 9136 individuals were sample...

Uruguay has a dense hydrographic network, nevertheless the knowledge of the aquatic macroinvertebrate community is still lacking. In recent decades afforestation with exotic species has increased which has produced changes in riparian vegetation of some rivers. The aim of this research was to determine the composition and trophic structure of macro...

South America is considered a world biodiversity hotspot, especially for freshwater ecosystems where there is significant biodiversity and endemism across different taxonomic groups. Native South American crayfishes are characterized by small range distributions, high levels of endemism and specific habitat requirements.Although this group may be c...

After nearly 70 years from description of three species of aeglids registered to Oriental Republic of Uruguay (Aegla platensis Schmitt, 1942; Aegla prado Schmitt, 1942 and Aegla uruguayana Schmitt, 1942), animals from this country deposited in Uruguayan and Brazilian scientific collections were examined. This work deepens our knowledge about the di...

This study describes the population structure of the crab Planes cyaneus Dana, 1851 associated with loggerhead sea turtles, Caretta caretta (Linnaeus, 1758), and inanimate flotsam in the southwestern Atlantic Ocean. Samples were collected by scientific observers onboard fishing vessels of the Uruguayan tuna fleet operating between 29 degrees -38 de...

Various authors have reported the occurrence of supernumerary gonopores in many species of Parastacus, which has generated discussion about their sexual system. In this study, we examine the external and internal sexual characters of 102 specimens of the burrowing crayfish, Parastacus pilimanus, captured in the province of Maldonado in southeast Ur...

En el presente trabajo se presentan los resultados para la determinación del modelo reproductivo en las especies uruguayas de crustáceos Parastacus varicosus; Parastacus brasiliensis y Parastacus piliimanus. Las aguas dulces de nuestro país se encuentran habitadas por cinco especies de cangrejos pertenecientes al género Parastacus, las que despiert...

[Caprella bathytatos Martin & Pettit, 1998, knowm from a marine hydrothermal vent in the Juan de Fuca Ridge, British Columbia, Canada, is reported from the southwestern Atlantic Ocean associated with the mouthparts and the cephalothorax of Lithodes santolla (Molina, 1782). This is the first report of this species associated with a lithodid crab and...

The problem of intersexuality was studied in the burrowing crayfish, Parastacus varicosus, by examining sexual characters of 142 specimens from Uruguay. It was demonstrated that all specimens had supernumerary gonopores, with a masculine or feminine gonad, from which gonoducts of both sexes emerged toward the respective gonopores. Under 22.6 mm of...