Tridentata turbinata ( Lamouroux, 1816 )

Gil, Marta & Ramil, Fran, 2025, Hydroids (Cnidaria, Hydrozoa) from Guinea Bissau, Zootaxa 5577 (1), pp. 1-89 : 55-56

Tridentata turbinata ( Lamouroux, 1816)

( Fig. 9F )

Dynamena turbinata Lamouroux, 1816: 180 .

Sertularia turbinata : Broch, 1914: 34.— Billard, 1925: 177–178, fig. 34.— Billard, 1931b: 248–249.— Vervoort, 1959: 275–277, figs 35–36.— Migotto, 1996: 78–79, fig. 14F–G.— Medel & Vervoort, 1998: 70–72, fig. 23.— Schuchert, 2003: 190–191, fig. 44.

Tridentata turbinata : Calder, 1991: 110–112, fig. 60.

Desmoscyphus brevicyathus : Versluys, 1899: 40–42, figs 9–10.

Material examined. BISSAU-0810, stn BS191, 10º18'25"– 10º19'20"N, 16º08'47"– 16º08'47"W, 24–25 m, 3-XI-2008: 107 colonies without gonothecae, 20–25 mm high, of which 20 growing on Idiellana pristis , 12 on Diphasia digitalis , six on bryozoans, three on crustaceans, two on Eudendrium capillare , one on Bimeria vestita , one on an unidentified hydroid and one on a bivalve.

BISSAU-0810, stn BS192, 10º19'30"– 10º20'15"N, 16º10'27"– 16º10'59"W, 24 m, 3-XI-2008: two colonies without gonothecae, 14 mm high, unknown substrate.

Remarks. Our material is consistent with that of Gil & Ramil (2023b) from Gabon. No further discussion is required.

Biology. Tridentata turbinata has been found growing on rocks, algae, barnacles, spines of echinoderms, polychaete tubes and hydroids ( Galea & Ferry 2015; Gil & Ramil 2023b). In the northern hemisphere, colonies with gonothecae have been found in February, April, June–August and December ( Vervoort 1959; Hirohito 1995, both as S. turbinata ; Galea & Ferry 2015; Humara-Gil & Cruz-Gómez 2018).

In our material, some colonies were found growing on hydroids, bivalves, bryozoans and crustaceans. Distribution. This is a circumtropical species ( Calder et al. 2019) from shallow waters, and its bathymetric distribution ranges from 0 ( Medel and Vervoort 1998, as S. turbinata ) to 50 m ( Schuchert 2003). Its distribution in West Africa has been recently documented by Gil & Ramil (2023b). Our colonies were collected at depths between 24– 25 m.

Figures

FIGURE 9.A. Tridentata loculosa (Busk, 1852) (stn BS199), portion of stem. B–D. Tridentata marginata (Kirchenpauer, 1864) (stn BS195); portion of colony (B); gonothecae (C–D). E. Tridentata rugosissima (Thornely, 1904) (stn BS193), portion of stem. F. Tridentata turbinata (Lamouroux, 1816) (stn BS191), portion of stem. Scales: a–f, 0.5 mm.