Streptocaulus multiseptatus (Bale, 1915) Cladocarpia multisepatus Bale, 1915: 304–306, pl. 47 figs. 1–5. Cladocarpus multiseptatus: Alvarez Claudio, 1993: 221–224, fig. 38, Lam. XX; Álvarez Claudio, 1995: 13–14, fig. 2.1; Bouillon et al., 2004: 124, fig. 65K. Cladocarpus cf. multiseptatus: Ramil & Vervoort, 1992: 109–111, fig. 27a. Streptocaulus multiseptatus: Ramil & Vervoort, 2008: 417–421, figs. 1–2. Material examined. MAURIT-0911, stn MUDR06, 17º40´22”N, 16º40´11”W, 435 m, 10-XII-2009: four colonies, without phylactocarps. Biology. Colonies of S. multiseptatus with phylactocarps and gonothecae have been found only in November (Ramil & Vervoort 2008). Our material was found on the cold-water coral mound barrier. Distribution. This species is known from Australia, Bay of Biscay, Alboran Sea and the Sahara coast; its bathymetric distribution ranges from 135 to 576 m (Ramil & Vervoort 2008). In West Africa, S. multiseptatus was reported in Western Sahara (Ramil & Vervoort 2008) and also in Mauritania (Gil & Ramil 2017a). Our material was collected from a depth of 435 m off Nouakchott, representing the southernmost record of the species in the Atlantic Ocean. Remarks. The material examined by us is consistent with the description of S. multiseptatus given by Ramil & Vervoort (2008) on the basis of material collected off the Sahara coast.

Published as part of Gil, Marta, Ramil, Fran & Agís, José Ansín, 2020, Hydroids (Cnidaria, Hydrozoa) from Mauritanian Coral Mounds, pp. 412-466 in Zootaxa 4878 (3) on page 432, DOI: 10.11646/zootaxa.4878.3.2, http://zenodo.org/record/4425132