Hydroids (Cnidaria, Hydrozoa) from Guinea Bissau Author Gil, Marta 0000-0002-8985-332X 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 & martag @ uvigo. gal; https: // orcid. org / 0000 - 0002 - 8985 - 332 X martag@uvigo.gal Author Ramil, Fran 0000-0002-9146-8201 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 & 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. gal; https: // orcid. org / 0000 - 0002 - 9146 - 8201 * Corresponding author framil@uvigo.gal text Zootaxa 2025 2025-01-29 5577 1 1 89 https://doi.org/10.11646/zootaxa.5577.1.1 journal article 10.11646/zootaxa.5577.1.1 1175-5334 14763362 A5924C49-3957-4A8A-BD8E-D0FE741D6B1F Diphasia alata ( Hincks, 1855 ) Sertularia alata Hincks, 1855: 127–128 , Pl. II. Diphasia alata : Hincks, 1869: 258 , Pl. XLVIII fig. 2.— Patriti, 1970: 43 , fig. 56.— Cornelius, 1995b: 35–37 , fig. 5.— Gil & Ramil, 2017b: 304–306 , fig. 2. Diphasia pinastrum : Cornelius, 1979: 267–269 , fig. 13.— Ramil & Vervoort, 1992a: 210–213 , fig. 57B–E. Material examined. BISSAU-0810, stn BS200, 10º18'55"N , 16º25'07"W , 79 m , 4-XI-2008 : one colony 12 mm high with gonothecae; unknown substrate. Remarks. Our material is consistent with that described by Gil & Ramil (2017b) , and represents the first record of D. alata for Guinea-Bissau , and the southernmost record in West Africa. Biology. This species has been reported growing on worm tubes, bivalve shells and hydroids ( Browne 1907 ; Ritchie 1910 ; Ramil & Vervoort 1992a ; Medel & Vervoort 1998 ) and soft bottoms ( Gil & Ramil 2017b ). In the northern hemisphere, colonies with gonothecae have been found between April and September, and in December ( Browne 1907 ; Billard 1931a ; Teissier 1965 ; Ramil & Vervoort 1992a ; Medel & Vervoort 1998 ; Gil & Ramil 2017b ). Distribution. Diphasia alata is an East-Atlantic species. In West Africa, it has been recorded from Morocco to Mauritania ( Gil & Ramil 2017b ). Its bathymetric distribution ranges from 7 m ( Marine Biological Association 1957 ) to 1024 m ( Gil & Ramil 2017b ). The colony studied by us was collected at a depth of 79 m .