Oswaldella elongata Pena Cantero, Garcia Carrascosa & Vervoort 1995

Oswaldella elongata Peña Cantero, García Carrascosa & Vervoort, 1995

(Figs 3, 16 C, 17C, 19C)

Material examined. Spanish Antarctic Expedition Antártida 8611: Stn 161, 14 December 1986, 54°53.80'– 54°54.60'S, 34°49.60'– 34°47.70'W (South Georgia, Clerke Rocks), 150–250 m (Department of Zoology, University of Valencia, ANT 161); Stn 182, 18 December 1986, 54°33.60’– 54°33.40’S, 35°48.20’– 35° 44.40’W (South Georgia), 86–176 m (Department of Zoology, University of Valencia, Coel. n° 3/ANT 182).

Description. Monosiphonic, unbranched stems, up to 210 mm high, divided into internodes. Angle between cauline apophyses and stem ca. 45°. Cauline apophyses with four nematophores: two axillary ones, each emerging through slot-shaped hole in the perisarc, and other two nematophores, each emerging through “mamelon” (Fig. 3 B–C).

Hydrocladia bifurcated (Fig. 3 A). First hydrocladial internode bifurcated, with two similar prongs (Fig. 3 A). Mesial inferior nematophore emerging from strongly marked swelling at proximal third of internode (Fig. 3 D–E); deprived of nematotheca (Fig. 3 D–E). Hydrotheca elongate, tubular, placed on middle of internode (Fig. 3 A, D–E). Adcauline wall mostly adnate (Fig. 3 D–E). Abcauline hydrothecal wall slightly convex. Hydrothecal aperture circular, even and adcaudally directed (Fig. 3 E).

Gonothecae unknown.