Symplectoscyphus nesioticus Blanco, 1977b

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

Symplectoscyphus nesioticus Blanco, 1977b

Symplectoscyphus nesioticus— Peña Cantero, 2010a: 39 (synonymy); 2010b: 770, fig. 5e; 2013: 134; 2014a: 1724, fig. 6f; Soto Àngel & Peña Cantero, 2015: 998–999, fig. 6m –o.

Material examined. Stn 17, colony with a few stems up to 6 mm high on Schizotricha nana (MNCN 2.03/639); Stn 53, stem fragment 15 mm long, two incipient stems up to 6 mm high on bryozoan (NIWA 117581); Stn 67, a few stems on algae (NIWA 117582); Stn 149, two stems up to 10 mm high on tube of polychaete (MNCN 2.03/ 640).

Measurements (in µm). Hydrothecae: length of abcauline wall 400, length free part of adcauline wall 360–390, length adnate part of adcauline wall 120–150, diameter at aperture 190–220.

Ecology and distribution. Shelf species, collected at depths from 56 (Peña Cantero 2006) to 701 m ( Peña Cantero 2014a); present material from 197 to 461 m, epibiotic on bryozoans, tube of polychaete and Schizotricha nana .

Circum-Antarctic distribution ( Peña Cantero 2014a). Recently reported from off Peter I Island ( Peña Cantero 2010b), off Low Island (Peña Cantero 2013) and from the Sandwich Islands and Discovery Bank ( Soto Àngel & Peña Cantero 2015), in West Antarctica , and off Queen Mary Coast ( Peña Cantero 2014a), in East Antarctica . See Peña Cantero (2010a) for previous records. Present material is the first record from the Ross Sea, collected off Possession Islands, Moubray Bay and Cape Hallett.