Abstract
The demosponge genus Placospongia includes 13 valid species, of which six occur in the Brazilian Exclusive Economic Zone. In the present study, we describe two new species of Placospongia from Northern (off the Amazon River mouth) and Northeastern Brazilian continental shelf and oceanic islands (i.e., Fernando de Noronha Archipelago), viz., Placospongia beatrizae sp. nov. and Placospongia amphinolastra sp. nov., and redescribe the holotype of Placospongia cristata Boury-Esnault, 1973, a poorly known species. In addition, we revise the Brazilian records of the allegedly cosmopolitan species P. carinata, P. melobesioides and P. intermedia, and provide new records of P. colombiensis and P. ruetzleri from Brazil. We demonstrate that P. carinata sensu Coelho & Mello-Leitão and P. intermedia sensu Muricy & Moraes and Jimenez et al. belong in fact to P. ruetzleri, and that P. melobesioides sensu Mothes et al. and González-Farías is a new species, described here as Placospongia beatrizae sp. nov. With the description of the two new species and synonymyzation of previous records, six species of Placospongia are currently known in Brazilian waters, two of which are endemic. A key to Placospongia species is also provided.
Reference46 articles.
1. Arndt, W. (1927) Kalk- und Kieselschwämme von Curaçao. Bijdragen tot de dierkunde, 25, 133–158. https://doi.org/10.1163/26660644-02501006
2. Becking, L. (2013) Revision of the genus Placospongia (Porifera, Demospongiae, Hadromerida, Placospongiidae) in the Indo-West Pacific. ZooKeys, 298, 39–76. https://doi.org/10.3897/zookeys.298.1913
3. Bettcher, L., Fernandez, J.C., Gastaldi, M., Bispo, A., Leal, C.V., Leite, D., Avelino-Alves, D., Clerier, P.H., Rezende, D., Gulart, C.M., Pinheiro, U. & Hajdu, E. (2023) Checklist, diversity descriptors and selected descriptions of a highly diverse intertidal sponge (Porifera) assemblage at Costa do Descobrimento (Bahia, Brazil). Zootaxa, 5277 (3), 443–489. https://doi.org/10.11646/zootaxa.5277.3.2
4. Bispo, R., Johnsson, R. & Neves, E. (2006) A new species of Asterocheres (Copepoda, Siphonostomatoida, Asterocheridae) associated to Placospongia cristata Boury‒Esnault (Porifera) in Bahia State, Brazil. Zootaxa, 1351, 23‒34. https://doi.org/10.11646/zootaxa.1351.1.3
5. Boury-Esnault, N. (1973) Résultats scientifiques des campagnes de la ‘Calypso’. Campagne de la ‘Calypso’ au large des côtes atlantiques de l’Amérique du Sud (1961‒1962). I. 29. Spongiaires. Annales de l’Institut océanographique, 49 (Supplement 10), 263–295.