Hydroids (Cnidaria, Hydrozoa) collected on the continental shelf of Brazil during the Geomar X Oceanographic Operation

Abstract

Hydroids (Cnidaria, Hydrozoa) collected on the continental shelf of Brazil during the GEOMAR X Oceanographic Operation. A total of 53 species of hydroids, belonging to 29 genera and 11 families, was collected at 57 oceanographic stations established during Operation GEOMAR X on board the Oceanographic Vessel “Almirante Câmara”, of the Ministry of the Navy, during May- June 1978. Areas investigated were the northern coast of the state of Rio de Janeiro, the coast of Espírito Santo, and the southern coast of Bahia. In the present contribution, the genus Antennella is recorded for the first time from the Brazilian coast. Antennella curvitheca Fraser, 1937 is reported for the first time from the southern hemisphere while Antennella campanulaformis (Mulder & Trebilcock, 1909) and Salacia desmoides (Torrey, 1902) are reported for the first time from the Atlantic Ocean. Five other species, Lafoea dumosa (Fleming, 1820), Antennella quadriaurita Ritchie, 1909, Nemertesia antennina (Linnaeus, 1758), Sertularella polyzonias (Linnaeus, 1758) and Hincksella cylindrica (Bale, 1888) were collected from Brazil for the first time. The reported bathymetric distributions of 28 species previously known from the Brazilian coast are extended. The known geographic distributions of seven species are extended along the coast, five northwards and two southwards.

Hydroids (Cnidaria, Hydrozoa) collected on the inner continental shelf of the state of Rio de Janeiro, Brazil, during the Oceanographic Operations GEOCOSTA RIO I and II

“…11,no. 2 Noronha Archipelago (Eston et al 1986, Pires et al 1992) and near Tamandaré (Calder & Maÿal 1998), as well as from Bahia (Kelmo & Santa-Isabel 1998, Grohmann et al 2003, Espírito Santo (Vannucci 1951b, Souza 1987, Grohmann et al 1997, Rio de Janeiro (Vannucci 1950(Vannucci , 1951a) São Paulo (Vannucci 1954, Migotto & Silveira 1987, Silveira & Migotto 1991, Migotto 1996, Rosso & Marques 1997, Marques & Migotto 2004, Paraná (Vannucci 1954, Migotto 1996 and Santa Catarina (Silveira & Migotto 1991). Bimeria vestita is known from Ceará (Shimabukuro et al 2006), Bahia (Kelmo & Santa-Isabel 1998), Espírito Santo (Grohmann et al 1997), and São Paulo (Migotto 1996, Rosso & Marques 1997, Marques & Migotto 2004).…”

“…Reports on benthos include studies of Mollusca (Absalão 1986, 1989, Absalão & Cruz 1990, Gomes & Absalão 1996. The first study on cnidarians from these cruises appeared as a report of the Operation GEOMAR X, covering the coast from Cabo de São Tomé to southern Bahia, in the area between the 16° and 22° south parallels (Grohmann et al 2003). The present report lists species collected during two other cruises, GEOCOSTA RIO I (1979) and GEOCOSTA RIO II (1986) that explored the State of Rio de Janeiro inner continental shelf.…”

Hydroids (Cnidaria, Hydrozoa) of the intertidal zone of Governador and Paquetá islands, Guanabara Bay, Rio de Janeiro, Brazil

“…Several variables influence the presence or absence of hydroids in marine environments: the type of substrate, hydrodynamism, luminosity, sedimentation, temperature, salinity, pollution, longer or shorter time of exposure to atmospheric air, and availability of food (BOERO, 1984;MERGNER, 1987;GILI & HUGHES, 1995;GROHMANN et al, 2003). In this study, hydroids were collected from several types of substrate (e.g., rocks, polychaete tubes, bits of trash, wood pieces, algae).…”

Fauna de hidrozoários atecados (Hydrozoa, Anthoathecata) da costa do Estado do Ceará, Brasil

“…Além de eurihalina e euritérmica, fato que explica a ampla distribuição na costa brasileira, como notado por Vannucci (1954), a espécie é também euribática, visto que já foi registrada para profundidades de até 70 m na plataforma continental brasileira, em região próxima ao estado do Espírito Santo (Grohmann et al 2003). No Nordeste, a espécie foi registrada para a região estuarina de Pernambuco, sendo umas das espécies de Hydrozoa mais freqüentes, ocorrendo em locais que iam desde a zona marinha até o interior do estuário (Calder & Maÿal 1998).…”

“…Estão listadas 357 espécies de Hydrozoa para o Brasil, 96 das quais pertencentes à subclasse Anthoathecata (Migotto et al 2002, Grohmann et al 2003. Os atecados, como são coloquialmente conhecidos os membros dessa subclasse, são caracterizados por apresentar o esqueleto quitinoso restrito à hidrorriza e hidrocaule, mas sem a presença de uma hidroteca, estrutura característica dos Leptothecata (tecados) (Millard 1975).…”