Symplectoscyphus vanhoeffeni Totton, 1930

ÁLVARO L. PEÑA CANTERO, 2017, Benthic hydroids (Cnidaria, Hydrozoa) from the Ross Sea (Antarctica) collected by the New Zealand Antarctic expedition BioRoss 2004 with RV Tangaroa, Zootaxa 4293 (1), pp. 1-65 : 45-46

Symplectoscyphus vanhoeffeni Totton, 1930

( Fig. 12 H)

Symplectoscyphus vanhoeffeni Totton, 1930: 187 –188, fig. 38a–d; Peña Cantero, 2010a: 41 (synonymy); 2014a: 1725, fig. 6h; Galea & Schories, 2012: 12 –13, fig. 2X –Z.

Material examined. Stn 51, fragment 11 mm long (NIWA 117584); Stn 128, mass of stems, ca. 50 mm in diameter, with gonothecae (NIWA 117585); Stn 129, fragment 5 mm long (NIWA 117586); Stn 130, a few tiny stems on Billardia subrufa (MNCN 2.03/641); Stn 132, mass of stems ca. 10 mm in diameter, with remnants of gonothecae (NIWA 117587); Stn 198, several stems up to 15 mm high on Schizotricha nana and holothurians (MNCN 2.03/642).

Ecology and distribution. Shelf and slope species, found at depths from 6 ( Naumov & Stepanjants 1972) to 964 m ( Peña Cantero 2014a); present material collected at depths between 85 and 222 m, epibiotic on holothurians, Billardia subrufa and Schizotricha nana , and with gonothecae in February.

Circum-Antarctic distribution ( Peña Cantero & García Carrascosa 1995). Recently reported from off King George Island ( Galea & Schories 2012), in West Antarctica , and off Queen Mary Coast ( Peña Cantero 2014a), in East Antarctica . See Peña Cantero (2010a) for previous records. In the Ross Sea, already known from McMurdo Sound and off Cape Adare ( Totton 1930). Present material collected in Robertson Bay and off Cape Adare, Adare Peninsula and Cape Hallett.

Figures

FIGURE 12. Antarctoscyphus admirabilis Peña Cantero, Svoboda & Vervoort, 1999: A, branch internode with hydrotheca. Symplectoscyphus aggregatus (Jäderholm, 1917): B, fragment of branch with hydrothecal arrangement and shape. Symplectoscyphus anae Peña Cantero, Svoboda & Vervoort, 2002: C, internode with hydrotheca. Symplectoscyphus densus sp. nov.: D – E, fragment of branch with hydrothecal arrangement and shape; Symplectoscyphus exochus Blanco, 1982: F, internode with hydrotheca. Symplectoscyphus liouvillei (Billard, 1914): G, internode with hydrotheca. Symplectoscyphus vanhoeffeni Totton, 1930: H, internode with hydrotheca. Symplectoscyphus weddelli Peña Cantero, Svoboda & Vervoort, 2002: I, internode with hydrotheca. Symplectoscyphus sp. 1: J, internode with hydrotheca. Symplectoscyphus sp. 2: K, internode with hydrotheca. (A from Stn 17; B from Stn 112; C from Stn 126; D from Stn 7 (holotype); E from Stn 97 (paratype); F from Stn 67; G from Stn 150; H from Stn 130; I, from Stn 53; J from Stn 7; K from Stn 25). Scale bar: 250 µm.