Oswaldella rigida Peña Cantero, Svoboda & Vervoort, 1997

Soto, Joan J. & Peña, Álvaro L., 2019, Benthic hydroids (Cnidaria, Hydrozoa) from the Weddell Sea (Antarctica), Zootaxa 4570 (1), pp. 1-78 : 46-47

Oswaldella rigida Peña Cantero, Svoboda & Vervoort, 1997

( Fig. 16 f–j)

Material examined. ANT XV/3: 48-27, few stems, up to 55 mm high; 48-72, few stems, up to 50 mm high; 48-168, few stems, up to 60 mm high; 48-189, few stems, up to 55 mm high; 48-276, few stems, up to 20 mm high; ANT

XXI/2: PS65/148, few stems, up to 75 mm high; PS65/237, few stems, up to 30 mm high; PS65/278, few stems, up to 70 mm high.

Ecology and distribution. Species collected at depths between 80 ( Peña Cantero et al. 1997a) and 1157 m ( Peña Cantero 2014a); present material was collected at depths between 119 and 417 m. Circum-Antarctic distribution ( Peña Cantero et al. 1997a).

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