Hydra viridissima (Pallas, 1766) is reported for the first time in the city of Corrientes, Argentina, in a freshwater body. The specimens were attached to the roots of native aquatic plants and were found to be undergoing both sexual reproduction, with the presence of ovary and testis, and asexual reproduction through budding. The species was notrecorded again in this body of water during 2023 and 2024.

El color de las cargas polínicas colectadas por Tetragonisca fiebrigi (schwarz) (apidae: meliponini) como herramienta para la meliponicultura chaqueña

This study focuses on freshwater bryozoans (Ectoprocta), particularly Phylactolaemata, which reproduce sexually and asexually, either by clonal budding or through encapsulated dormant structures called statoblasts. These structures are crucial for the taxonomic identification of bryozoans. Current knowledge about taxonomy, systematics, physiology, ecology, and biogeography of freshwater bryozoans in South America is scarce. In Argentina, the diversity and distribution of bryozoans are poorly known, with most studies focusing on marine species. The findings of Plumatella emarginata Allman, 1844 in northeastern Argentina represents the first record of a Phylactolaemata in a RAMSAR site in this country. The study area includes Totorá Lagoon and Iberá Lagoon in the Province of Corrientes, northeastern Argentina, both crucial to the local and regional ecosystem. Water physicochemical parameters were measured. This study highlights the need for further research on freshwater bryozoans in South America to enhance our understanding of these ecologically significant organisms.