Lytocarpia tridentata ( Versluys, 1899 )

Gil, Marta & Ramil, Fran, 2025, Hydroids (Cnidaria, Hydrozoa) from Guinea Bissau, Zootaxa 5577 (1), pp. 1-89 : 59-60

Lytocarpia tridentata ( Versluys, 1899)

( Fig. 10C )

Aglaophenia tridentata Versluys, 1899: 47–49 , fig. 8g –k.— Picard, 1951a: 114.— Vervoort, 1968: 76–78, fig. 35.— Posada et al., 2010: 79, fig. 4.

Lytocarpia tridentata : Migotto, 1996: 42–46, fig. 8G–K.— Grohmann et al., 2003: 13.— Gil & Ramil 2021a: 177–178, fig. 5B.

Aglaophenia contorta : Nutting, 1900: 96, pl. XX figs 5–7.— Vannucci Mendes, 1946: 583–586, figs 56–59, 70.

Thecocarpus contorta : Totton, 1926: 210–212.

Material examined. BISSAU-0810, stn BS191, 10º18'25"– 10º19'20"N, 16º08'47"– 16º08'47"W, 24–25 m, 3-XI-2008: six colonies without corbulae, 1–150 mm high, of which one growing on a bryozoan and one on a crustacean.

BISSAU-0810, stn BS192, 10º19'30"– 10º20'15"N, 16º10'27"– 16º10'59"W, 24 m, 3-XI-2008: ten colonies without corbulae, 50–300 mm high, substrate unknown.

BISSAU-0810, stn BS193, 10º21'13"– 10º21'51"N, 16º10'17"– 16º10'56"W, 20–21 m, 3-XI-2008: three colonies without corbulae, 39–143 mm high, substrate unknown.

BISSAU-0810, stn BS194, 10º21'59"– 10º22'36"N, 16º13'23"– 16º14'03"W, 21–24 m, 3-XI-2008: two colonies without corbulae, 171 mm high, substrate unknown.

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

Biology. This species has been found recently growing on octocorals and limestone (Calder 2019). In the north hemisphere, fertile material was found in January and June, while in the southern hemisphere it has been found between February–April and July–December ( Gil & Ramil 2021a).

In our material, some colonies were found growing on bryozoans and crustaceans. Corbulae were not observed.

Distribution. Lytocarpia tridentata is an amphi-Atlantic hydroid ( Gil & Ramil 2021a). In West Africa, it has been only recorded from the Republic of Guinea ( Picard 1951a, as Aglaophenia tridentata ; Gil & Ramil 2021a). Its bathymetric range extends from 0 to 70 m ( Grohmann et al. 2003).

Our material was collected at depths between 20–25 m.

Genus Macrorhynchia Kirchenpauer, 1872

Figures

FIGURE 10. A–B. Aglaophenia tubulifera (Hincks, 1861) (stn BS157); portion of hydrocladium (A); corbula (B). C. Lytocarpia tridentata (Versluys, 1899) (stn BS191), portion of hydrocladium. D. Macrorhynchia philippina Kirchenpauer, 1872 (stn BS191), portion of hydrocladium. E. Halopteris catharina (Johnston, 1833) (stn BS134), portion of hydrocladium. Scales: a–e, 0.5 mm.