Symplectoscyphus vanhoeffeni Totton, 1930

Galea, Horia R. & Schories, Dirk, 2012, Some hydrozoans (Cnidaria) from King George Island, Antarctica, Zootaxa 3321, pp. 1-21 : 12-13

Symplectoscyphus vanhoeffeni Totton, 1930

( Fig. 2 X–Z)

Symplectoscyphus vanhoeffeni — Peña Cantero, Svoboda & Vervoort, 2002: 1556, fig. 15.

Material examined. Stn. SHO — 07.ii.2011, Ant.06/2011 (6 m): numerous fertile stems, up to 2.5 cm high (MHNG-INVE-79775); 19.ii.2011, Ant.01/2011 (6 m): a fragmentary colony composed of numerous stems, up to 1.5 cm high, a single broken gonotheca. Stn. ARD — 15.ii.2010, Ant.12/2010 (10–15 m): numerous sterile stems, up to 3 cm high, on seaweed.

Remarks. A redescription and a lengthy synonymy are given in Peña Cantero et al. (2002). The sterile sample Ant.12/2010 ( Fig. 2 Y) was compared to the fertile material Ant.06/2011 ( Fig. 2 X, Z) and proved morphologically identical.

Geographical distribution. Circum-Antarctic ( Peña Cantero et al. 2002).

Figures

FIGURE 2. A – C: Hydractinia angusta Hartlaub, 1904 — fragment of colony showing gastro-, gonozooid, and spine (A); gonozooid (B); cnidome (C). D: Opercularella sp. — hydrothecate pedicel. E, H: Halecium antarcticum Vanhöffen, 1910 — stem internode (E); gonotheca (H). F, G, I: Halecium delicatulum Coughtrey, 1876 — specimen MHNG-INVE- 26669, showing hydrothecae (F), stem internodes (G), and a female gonotheca (I). J, K: Halecium ovatum Totton, 1930 — fragment of stem showing branching pattern (J); female fonotheca (K). L, M: Antarctoscyphus elongatus (Jäderholm, 1904) — internodes with hydrothecae (L); gonotheca (M). N – P: Antarctoscyphus spiralis (Hickson & Gravely, 1907) — internode with hydrotheca (N); hydrothecal aperture in frontal view, showing intrathecal cusps (O); gonotheca (P). Q – S: Sertularella gaudichaudi (Lamouroux, 1824) — fragment of stem (Q); hydrotheca (R); female gonotheca (S). T, U: Symplectoscyphus cumberlandicus (Jäderholm, 1905) — fragment of stem (T); female gonotheca (U). V, W: Symplectoscyphus glacialis (Jäderholm, 1904) — fragment of stem (V); gonotheca (W). X – Z: Symplectoscyphus vanhoeffeni Totton, 1930 — fragments of stems from Stn. Ant. 06 / 2011 (X) and Stn. Ant. 12 / 2010 (Y); gonotheca from material from Stn. Ant. 06 / 2011 (Z). Scale bars: 10 µm (C), 100 µm (O), 300 µm (D, R), 400 µm (B), 500 µm (E – I, K – N, P, V – Z), 800 µm (J), 900 µm (T), 1 mm (A, Q, S, U).