Oswaldella erratum Peña Cantero & Vervoort, 1997

Soto, Joan J. & Peña, Álvaro L., 2019, Benthic hydroids (Cnidaria, Hydrozoa) from the Weddell Sea (Antarctica), Zootaxa 4570 (1), pp. 1-78 : 46

Oswaldella erratum Peña Cantero & Vervoort, 1997

( Fig. 16 a–e)

Material examined. ANT XV/3: 48-4, few stems, up to 80 mm high, on gravel, with developing gonothecae; 48-50, few stems, up to 100 mm high, with developing gonothecae; 48-58, few stems, up to 90 mm high, with developing gonothecae; 48-168, few stems, up to 60 mm high, with developing gonothecae; 48-197, few stems, up to 45 mm high; 48-222, few stems, up to 55 mm high, with developing gonothecae; 48-276, few stems, up to 95 mm high, with developing gonothecae; ANT XXI/2: PS65/39, few stems, up to 70 mm high, with gonothecae; PS65/121, several stems, up to 100 mm high, with developing gonothecae; PS65/132, several stems, up to 205 mm high, some on polychaete tube; PS65/148, few stems, up to 75 mm high, on gravel; PS65/166, several stems, up to 160 mm high; PS65/174, several stems, up to 170 mm high; PS65/175, several stems, up to 120 mm high; PS65/237, several stems, up to 120 mm high, with gonothecae; PS65/274, several stems, up to 150 mm high; PS65/280, several stems, up to 140 mm high; PS65/336, one stem, c. 20 mm high.

Ecology and distribution. Species previously found at depths between 55 ( Peña Cantero & Vervoort 2004) and 696 m ( Peña Cantero et al. 1997a); present material between 166 and 417 m. West Antarctic distribution ( Peña Cantero & Vervoort 2004).

Figures

FIGURE 16. a–e Oswaldella erratum: a stem; b cauline apophysis showing nematophore; c hydrotheca in lateral view; d hydrotheca in frontal view; e female gonotheca. f–j O. rigida: f cauline apophysis showing nematophore; g hydrotheca in lateral view; h hydrotheca in frontal view; i stem; j detail of the stem showing hydrocladial arrangement. k-l O. delicata: k hydrotheca in lateral view; l hydrotheca in frontal view