First in situ record of the medusa stage of Cladonema radiatum (Cnidaria: Anthoathecata) in the South Atlantic Ocean

On the morphological variations in a population of Cladonema radiatum (Hydrozoa: Cladonematidae): New evidence from the southern Gulf of Mexico

“…Cladonema radiatum was more abundant in July, when salinity showed the lowest values and temperature ranged from 29.3 to 30.2 °C. The temperature values recorded during July in Chelem match with those recorded by Bittencourt-Farias et al (2020) in the South Atlantic Ocean. However, temperature in Chelem was lower than that recorded by Ghory et al (2020) in the Arabian Sea.…”

“…Algunos registros de esta especie son los siguientes: Noruega, Islas Británicas, Irlanda, Suecia, Dinamarca, Helgoland, Holanda, Bélgica y Francia (Mayer 1910, Russell 1953, Schuchert 1996; Italia (Brinckmann-Voss 1970); y el mar Negro y la costa atlántica de la península Ibérica (Medel y López-González 1996). También ha sido registrada en las costas de Brasil (Migotto 1996, Bittencourt-Farias et al 2020 (Kramp 1959, Vervoort 1968), Bermuda (Calder 1988), Belice (Calder 1991) y Bahamas (Mayer 1910, Kramp 1970). Cladonema radiatum was first described in the Mediterranean, St. Malo and Lorient (France) (Dujardin 1843).…”

“…Some records of the species are as follow: Norway, the British Isles, Ireland, Sweden, Denmark, Helgoland, Holland, Belgium, and France (Mayer 1910, Russell 1953, Schuchert 1996; Italy (Brinckmann-Voss 1970); and the Black Sea and Atlantic coast of the Iberian Peninsula (Medel and López-González 1996). It is also known from the coasts of Brazil (Migotto 1996, Bittencourt-Farias et al 2020 (Kramp 1959, Vervoort 1968), Bermuda (Calder 1988), Belize (Calder 1991), and the Bahamas (Mayer 1910, Kramp 1970.…”

The first record of the calanoid family Pseudocyclopidae Giesbrecht, 1893 in the South Atlantic Ocean

“…Pseudocyclops have been sampled with the usual plankton vertical tows (Esterly, 1911; Gurney, 1927; Sewell, 1932; Bowman and González, 1961; Vervoort, 1964; Yeatman, 1975; Dawson, 1977; Alldredge and King, 1980; Othman and Greenwood, 1989; Haridas et al ., 1994; Campolmi et al ., 2001; Zagami et al ., 2008; Brugnano et al ., 2010), hand tows (Bowman and González, 1961; Ohtsuka et al ., 1999) and the scraping of fouling community on moored posts (Zagami et al ., 2005). However, due to its characteristically vertical migration behaviour, the use of demersal traps is a much more adequate method of sampling not only Pseudocyclops but all demersal zooplankton (Youngbluth, 1982; Farias et al ., 2020). In this study, using emergence traps we found a higher number of specimens than previously recorded in the literature for this family.…”

First record of Cnidocodon leopoldi Bouillon, 1978 (Cnidaria: Anthoathecata) in the Atlantic Ocean

“…Historically, planktonic cnidarian biodiversity from tropical areas in the western border of the Atlantic Ocean were understudied comparing to subtropical and temperate provinces. With recent progress in oceanographic research in Northeast Brazil this situation started changing not only for cnidarians (e.g., Farias et al, 2020;Tosetto et al, 2018Tosetto et al, , 2020Tosetto et al, , 2021aTosetto et al, , 2021b but also for other marine animals (e.g., Eduardo et al, 2018Eduardo et al, , 2020Alves-Jr. et al, 2019. Thus, the current report contributes not only to the understanding of local biodiversity, but also for an adequate comprehension of regional and global biogeographic and diversity patterns.…”