Species of Lensia (Cnidaria: Hydrozoa: Siphonophorae) from southeastern Brazilian waters

ABSTRACT The siphonophores of the Brazilian coast are poorly studied, despite their abundance and ecological importance. Lensia is the most diverse genus within Siphonophora, with twenty-six valid species. A total of twenty species of Lensia are recorded for South American marine waters. This study presents morphological descriptions and an identification key to the species of Lensia that were collected in two oceanographic campaigns throughout the southeastern Brazilian coast. A total of sixty-one specimens were photographed, described, schematized and measured, and fifteen species of Lensia were identified

Species of Lensia (Cnidaria: Hydrozoa: Siphonophorae) from southeastern Brazilian waters

ABSTRACT The siphonophores of the Brazilian coast are poorly studied, despite their abundance and ecological importance. Lensia is the most diverse genus within Siphonophora, with twenty-six valid species. A total of twenty species of Lensia are recorded for South American marine waters. This study presents morphological descriptions and an identification key to the species of Lensia that were collected in two oceanographic campaigns throughout the southeastern Brazilian coast. A total of sixty-one specimens were photographed, described, schematized and measured, and fifteen species of Lensia were identified

Biodiversity and distribution patterns of planktonic cnidarians in San Matías Gulf, Patagonia, Argentina

12 pages, 5 figures, 3 tablesThe special location (40-42°S in the Southwestern Atlantic Ocean) and the hydrodynamic regime (limited water exchange with open ocean) in San Matías Gulf (Argentina) seem to produce a particular fauna of planktonic cnidarians whose their abundances are mainly shaped by the Gulf circulation. Four oceanographic cruises, covering 93 stations in three different seasons during 2007 and 2008 were carried out to quantify species richness and abundance, as well as to analyse the distribution of these cnidarians. We identified 20 species of hydromedusae and one siphonophore, increasing the total number of hydromedusae for the area to 23. This value is similar to the one found in the abutting Argentine continental shelf (20), but with a different assemblage composition. Hydromedusae abundances found were low, except for a bloom of the Leptomedusa Obelia spp. during the cold season. The only siphonophore found in the area, Pyrostephos vanhoeffeni, has previously been thought to be endemic to Antarctic and sub-Antarctic waters, this being the first record for temperate waters of the Southwest Atlantic OceanThis work was funded by the projects PID 2003#371 and PICT-2006 Start up #1575 (Agencia Nacional de Promoción Científica y Tecnológica); EXA 465/11 (Universidad Nacional de Mar del Plata) and PIP – CONICET 112 201101 00152. E. Guerrero acknowledges financial support from AECI (Agencia Española de Cooperación Internacional-Ministerio Asuntos Exteriores). C. Rodriguez is supported by CONICET fellowship. E. M. Araujo acknowledges the fellowship support by CAPES (Coordenação de Aperfeiçoamento de Pessoal de Nı´vel Superior), Brazil. A. Canepa was funded by CONICYT (PFCHA/Doctorado al Extranjero 4ª Convocatoria, 72120016).The publication of this paper is supported by CONISMA, the Italian National Interuniversity Consortium for Marine SciencesPeer reviewe

Census of Cnidaria (Medusozoa) and Ctenophora from South American marine waters

We have compiled available records in the literature for medusozoan cnidarians and ctenophores of South America. New records of species are also included. Each entry (i.e., identified species or still as yet not determined species referred to as "sp." in the literature) includes a synonymy list for South America, taxonomical remarks, notes on habit, and information on geographical occurrence. We have listed 800 unique determined species, in 958 morphotype entries: 5 cubozoans, 905 hydrozoans, 25 scyphozoans, 3 staurozoans, and 20 ctenophores. Concerning nomenclatural and taxonomical decisions, two authors of this census (Miranda, T.P. & Marques, A.C.) propose Podocoryna quitus as a nomen novum for the junior homonym Hydractinia reticulata (Fraser, 1938a); Euphysa monotentaculata Zamponi, 1983b as a new junior synonym of Euphysa aurata Forbes, 1848; and Plumularia spiralis Milstein, 1976 as a new junior synonym of Plumularia setacea(Linnaeus, 1758). Finally, we also reassign Plumularia oligopyxis Kirchenpauer, 1876 as Kirchenpaueria oligopyxis(Kirchenpauer, 1876) and Sertularella margaritacea Allman, 1885 as Symplectoscyphus margaritaceus (Allman, 1885).Fil: Oliveira, Otto M. P.. Universidade Federal de Santa Catarina; BrasilFil: Miranda, Thaís P.. Universidade de Sao Paulo; BrasilFil: Araujo, Enilma M.. Faculdade Pitágoras de Feira de Santana; BrasilFil: Ayón, Patricia. Instituto Mar del Peru; PerúFil: Cedeño Posso, Cristina M.. Instituto de Investigaciones Marinas y Costeras; ColombiaFil: Cepeda Mercado, Amancay A.. ProCAT Colombia/Internacional; ColombiaFil: Córdova, Pablo. Pontificia Universidad Católica de Chile; ChileFil: Cunha, Amanda F.. Universidade de Sao Paulo; BrasilFil: Genzano, Gabriel Nestor. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico Conicet - Mar del Plata. Instituto de Investigaciones Marinas y Costeras. Universidad Nacional de Mar del Plata. Facultad de Ciencias Exactas y Naturales. Instituto de Investigaciones Marinas y Costeras; ArgentinaFil: Haddad, Maria Angélica. Universidade Federal do Paraná; BrasilFil: Mianzan, Hermes Walter. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico Mar del Plata. Instituto de Investigaciones Marinas y Costeras. Subsede Instituto Nacional de Investigación y Desarrollo Pesquero; ArgentinaFil: Migotto, Alvaro E.. Universidade de Sao Paulo; BrasilFil: Miranda, Lucília S.. Universidade de Sao Paulo; BrasilFil: Morandini, André C.. Universidade de Sao Paulo; BrasilFil: Nagata, Renato M.. Universidade de Sao Paulo; BrasilFil: Nascimento, Karine B.. Universidade de Sao Paulo; BrasilFil: Nogueira, Miodeli. Universidade Federal da Paraíba; BrasilFil: Palma, Sergio. Pontificia Universidad Católica de Chile; ChileFil: Quiñones, Javier. Instituto Mar del Perú; PerúFil: Rodriguez, Carolina Soledad. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico Conicet - Mar del Plata. Instituto de Investigaciones Marinas y Costeras. Universidad Nacional de Mar del Plata. Facultad de Ciencias Exactas y Naturales. Instituto de Investigaciones Marinas y Costeras; ArgentinaFil: Scarabino, Fabrizio. Instituto Nacional de Investigaciones y Desarrollo Pesquero; ArgentinaFil: Schiariti, Agustin. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico Mar del Plata. Instituto de Investigaciones Marinas y Costeras. Subsede Instituto Nacional de Investigación y Desarrollo Pesquero; ArgentinaFil: Stampar, Sergio. Universidade Estadual Paulista Julio de Mesquita Filho; BrasilFil: Tronolone, Valquíria B.. Universidade de Sao Paulo; BrasilFil: Marques, Antonio C.. Universidade de Sao Paulo; Brasi