Streptocaulus dollfusi ( Billard, 1924 )

Streptocaulus dollfusi ( Billard, 1924) View in CoL

Cladocarpus dollfusi Billard, 1924: 87–89 View in CoL , fig. 1.— Patriti, 1970: 52, fig. 72. Streptocaulus dollfusi View in CoL : Medel & Vervoort, 1995: 24–27, figs 9, 10.— Ansín Agís et al., 2001: 112–115, fig. 50.

Cladocarpus ventricosus View in CoL : Vervoort, 1959: 300–302, fig. 49 (non Cladocarpus ventricosus Allman, 1877 View in CoL ).

Material examined. BISSAU-0810, stn BS152, 10º31'12"– 10º30'19"N, 17º12'34"– 17º12'32"W, 300–305 m, 27-X-2008: two colonies with gonothecae, 122–136 mm high, substrate unknown.

BISSAU-0810, stn BS216, 10º30'53"– 10º31'39"N, 16º31'33"– 16º32'02"W, 56–58 m, 7-XI-2008: two colonies (one with gonothecae), 57–75 mm high, substrate unknown.

Remarks. This is a well-known species characterized by the curvature of its hydrothecae, with a convex basal part and an almost straight distal part. No further comments are necessary.

Our finding represents the first record of this species for Guinea-Bissau.

Biology. In the northern hemisphere, fertile material has been found between October and December ( Medel & Vervoort 1995; Gil & Ramil 2017a). Patriti (1970) found colonies with phylactocarps in material collected off Morocco, but without indication of the collection date; therefore, the reproductive period could be longer than indicated here.

In our material, phylactocarps were found in October and November.

Distribution. Streptocaulus dollfusi is an amphi-Atlantic species that also penetrates the western Mediterranean ( Ansín Agís et al. 2001). In West Africa, it has been recorded from Morocco ( Billard 1934; Patriti 1970, as C. dollfusi ), Mauritania ( Ansín Agís et al. 2001; Gil & Ramil 2017a), Sierra Leone and Senegal ( Vervoort 1959, as C. ventricosus ). Its bathymetric distribution ranges from 60 to 1513 m ( Medel & Vervoort 1995; Gil & Ramil 2017a).

Our material was collected at depths between 56–305 m.