Hydroids (Cnidaria, Hydrozoa) from Mauritanian Coral Mounds Author Gil, Marta Departamento de Ecoloxía e Bioloxía Animal, Facultade de Ciencias do Mar e Centro de Investigación Mariña (CIM-UVigo), Universidade de Vigo. Campus Lagoas-Marcosende. 36310 Vigo. Spain. & Instituto Español de Oceanografía, Centro Oceanográfico de Vigo. Subida Radio Faro 50. 36390 Vigo. Spain. Author Ramil, Fran Departamento de Ecoloxía e Bioloxía Animal, Facultade de Ciencias do Mar e Centro de Investigación Mariña (CIM-UVigo), Universidade de Vigo. Campus Lagoas-Marcosende. 36310 Vigo. Spain. & framil @ uvigo. es Author Agís, José Ansín Departamento de Ecoloxía e Bioloxía Animal, Facultade de Ciencias do Mar e Centro de Investigación Mariña (CIM-UVigo), Universidade de Vigo. Campus Lagoas-Marcosende. 36310 Vigo. Spain. & ansinjose @ gmail. com text Zootaxa 2020 2020-11-16 4878 3 412 466 journal article 7931 10.11646/zootaxa.4878.3.2 288c6fc9-269b-468f-8811-d79d4350f6e4 1175-5326 4425132 4F59F5B2-CFDB-4819-AF83-0EF232328F8D Plumularia setacea ( Linnaeus, 1758 ) Plumularia setacea : Ramil & Vervoort, 1992: 191–193 , fig. 47F–I; Ansín Agís et al ., 2001: 238–245 , fig. 91; Peña Cantero & García Carrascosa, 2002: 117–119 , fig. 21C–D; Vervoort, 2006: 259 ; Ansín Agís et al ., 2014: 824 , fig. 22. Material examined. MAURIT-0911, stn MUDR 01, 16º08´24”N , 16º57´12”W , 488 m , 5-XII-2009 : six colonies, one colony growing on Lophelia pertusa and two on Aglaophenia lophocarpa ; one colony with gonothecae. MAURIT-0911, stn MUDR02 , 16º08´50”N , 16º57´01”W , 462 m , 5-XII-2009 : one colony, no gonothecae . MAURIT-1011, stn MUDR20 , 16º08´11”N , 16º56´08”W , 405 m , 7-XII-2010 : one colony on Nemertesia sp., without gonothecae . MSM 16 /3, stn GeoB 14801–1, 20°14.762’N , 17°40.173’W , 568 m , 3-XI-2010 : three colonies on Aglaophenia lophocarpa , no gonothecae . Biology. Plumularia setacea usually grows attached to other hydroid species, but it can also colonize a wide range of other substrata ( Peña Cantero & García Carrascosa 2002 ). Fertile material has been found throughout the year ( Ansín Agís et al. 2014 ). Our colonies were attached to the hydroids A. lophocarpa and Nemertesia sp. and the scleractinian coral L. pertusa ; fertile material has been found in December. Distribution. This species has a circumglobal distribution with a bathymetric range from 0 to 1513 m ( Ansín Agís et al. 2001 ; Gil & Ramil 2017a ). In West Africa, it was collected from Morocco ( Billard 1906b ; Patriti 1970 ; Ansín Agís et al. 2001 ), West Sahara (Vervoort 1946), Mauritania ( Ansín Agís et al. 2001 ; Gil & Ramil 2017a ), Cape Verde Islands ( Bedot 1921b ; Ansín Agís et al. 2001 ), Senegal ( Picard 1951 ), Guinea-Bissau ( Gili et al. 1989 ), Ghana ( Buchanan 1957 ), Angola ( Broch 1914 ; Bouillon et al. 1995 ) and Namibia ( Broch 1914 ; Gili et al. 1989 ). The material studied by us was collected from depths of 405 to 568 m . Remarks. This species is well-known and does not require further comments. Schuchert (2014) analysed the genetic diversity within P. setacea by using a set of worldwide samples, and the results suggested a species complex; however, they could also be considered as a single species with an extensive population subdivision.