Sertularella undulitheca Vervoort, 1959

Gil, Marta & Ramil, Fran, 2025, Hydroids (Cnidaria, Hydrozoa) from Guinea Bissau, Zootaxa 5577 (1), pp. 1-89 : 48

Sertularella undulitheca Vervoort, 1959

( Fig. 8B )

Sertularella undulitheca Vervoort, 1959: 269–271 , fig. 32.— Gil & Ramil, 2023b: 421–422, fig. 2A, B.

Material examined. BISSAU-0810, stn BS192, 10º19'30"– 10º20'15"N, 16º10'27"– 16º10'59"W, 24 m, 3-XI-2008: one colony without gonothecae; substrate unknown.

Remarks. Sertularella undulitheca is easily identifiable due to the morphology of its hydrothecae. Our material agrees with that described by Gil & Ramil (2023b) and represents the first record of this species for Guinea-Bissau. No further discussion is necessary.

Biology. This species has been found growing on stones and on Aglaophenia willasseni Gil & Ramil, 2021 ( Gil & Ramil 2023b). In the northern hemisphere, fertile material has been found in January ( Vervoort 1959), while in the southern hemisphere, gonothecae were observed in June ( Gil & Ramil 2023b).

Distribution. Sertularella undulitheca has been recorded from Guinea-Bissau, the Republic of Guinea, Ghana ( Vervoort 1959), Sao Tome and Principe, and Gabon ( Gil & Ramil 2023b). Its bathymetric distribution ranges from 18 to 359 m depth ( Gil & Ramil 2023b).

Our colony was collected at a depth of 24 m.

Figures

FIGURE 8. A. Sertularella polyzonias (Linnaeus, 1758) (stn BS157), portion of colony. B. Sertularella undulitheca Vervoort, 1959 (stn BS192), portion of hydrocladium. C. Amphisbetia distans (Lamouroux, 1816) (stn BS192), portion of stem. D–F. Idiellana pristis (Lamouroux, 1816) (stn BS191); portion of hydrocladium (D); gonothecae (E–F). Scales: a–f, 0.5 mm.