title: A new species of freshwater sponge, Heteromeyenia barlettai sp. nov. from an aquarium in São Paulo, Brazil (Spongillida: Spongillidae).
abstract: A new species of freshwater sponge, Heteromeyenia barlettai sp. nov., is proposed here based on specimens discovered in a private aquarium in São Paulo, Brazil, and most likely inadvertently collected from the Paraná Basin. The present study also presents a redescription of H. insignis on the basis of the specimen reported upon by Volkmer (1963), collected from the Atlântico Sul Hydrographic Basin. Spicule measurements (n=30) were made for comparison with other Heteromeyenia species. This is the first time that H. insignis has its complete set of spicules studied under SEM. After comparison with the redescription of the type of H. baileyi, we also find characteristics that justify the maintenance of H. insignis as a valid species. A key to species of Heteromeyenia is provided.
authors.affiliation: Departamento de Zoologia, Universidade Federal de Pernambuco, Recife, Brazil; Email: uspinheiro@hotmail.com.
authors.forename: Ulisses
authors.initials: U
authors.lastname: Pinheiro
authors.affiliation: Departamento de Zoologia, Universidade Federal de Pernambuco, Recife, Brazil; Email: unknown.
authors.forename: Ludimila
authors.initials: L
authors.lastname: Calheira
authors.affiliation: Museu Nacional, Departamento de Invertebrados, Universidade Federal de Rio de Janeiro, Rio de Janeiro, Brazil; Email: unknown.
authors.forename: Eduardo
authors.initials: E
authors.lastname: Hajdu
mesh_terms: D063147:Animal Distribution; D000825:Animal Structures / Q000033:anatomy & histology / Q000254:growth & development; D000818:Animals; D049628:Body Size; D001938:Brazil; D017753:Ecosystem; D009929:Organ Size; D011161:Porifera / Q000033:anatomy & histology / Q000145:classification* / Q000254:growth & development