Polyplumaria flabellata Sars, 1874

Gil, Marta, Ramil, Fran & Agís, José Ansín, 2020, Hydroids (Cnidaria, Hydrozoa) from Mauritanian Coral Mounds, Zootaxa 4878 (3), pp. 412-466 : 435

Polyplumaria flabellata Sars, 1874

( Fig. 12C )

Polyplumaria flabellata: Ramil & Vervoort, 1992: 193–197 , fig. 50A–G; Cornelius, 1995b: 163–165, fig. 38, Ansín Agís et al., 2001: 248–253, figs, 93–94.

Material examined. MAURIT-0911, stn MUDR01 , 16º08´24”N, 16º57´12”W, 488 m, 5-XII-2009: two colonies, one colony with gonothecae .

MAURIT-0911, stn MUDR02 , 16º08´50”N, 16º57´01”W, 462 m, 5-XII-2009: six colonies, without gonothecae .

MAURIT-1011, stn MUDR19 , 16º09´06”N, 16º56´50”W, 561 m, 7-XII-2010: two colonies, 48–63 mm high, one colony with gonothecae .

MAURIT-1011, stn MUDR20 , 16º08´11”N, 16º56´08”W, 405 m, 7-XII-2010: six colonies, 30–60 mm high, without gonothecae .

MAURIT-1011, stn MUDR21 , 16º28´13”N, 16º51´43”W, 522 m, 9-XII-2010: one colony 45 mm high, no gonothecae .

Biology. Fertile colonies were found in March and between May and August ( Ansín Agís et al. 2001).

In our material, gonothecae were found in December.

Distribution. An East Atlantic species distributed from Iceland and Norway to off the mouth of the Congo River and in the Alboran Sea, West Mediterranean ( Ansín Agís et al. 2001). In West Africa, it was collected from Morocco ( Kramp 1947; Patriti 1970; Ramil & Vervoort 1992), Mauritania ( Gil & Ramil 2017a) and off the mouth of the Congo River (Vervoort 1966). Its bathymetric range extends from 47 to 2200 m ( Ansín Agís et al. 2001).

Our material was collected on the cold-water coral mound barrier from depths of 405 to 561 m.

Remarks. The material obtained from the Mauritanian cold-water coral mound barrier was consistent with those described by Ramil & Vervoort (1992) and Ansín Agís et al. (2001) from Azores and Northwest Africa.

Figures

FIGURE 12. A–B, Kirchenpaueria bonnevieae (Billard, 1906) (stn MUDR01): A, part of hydrocladium. B, gonotheca. C, Polyplumaria flabellata Sars, 1874 (stn MUDR01), part of hydrocladium. D, Plumularia filicula (stn MUDR01), part of colony with gonotheca. Scales: a–d = 0.5 mm.