Primeiro registro de Corvoheteromeyenia australis (Bonetto & Ezcurra de Drago) para o Brasil com chave taxonômica para os poríferos do Parque Estadual Delta do Jacuí, Rio Grande do Sul, Brasil

A taxonomic key is provided for the assembly of sponges of the floating meadows, in a protected deltaic area at southern Brazil. The roots of the water hyacinths Eichhornia azurea (Sw). Kunth and Eichhornia crassipes (Mart.) Solms-Laubach were seen to be the prefered substrates. The register of C. australis (Bonetto & Ezcurra de Drago, 1966) is the first for Brazil enhancing a discussion of the genus.