Oswaldella tottoni Pena Cantero & Vervoort 1996

• Main Authors: Soto, Joan J., Peña, Álvaro L.
• Format: Other/Unknown Material
• Language: unknown
• Published: Zenodo 2019
• Subjects: Biodiversity; Taxonomy; Animalia; Cnidaria; Hydrozoa; Leptothecata; Kirchenpaueriidae; Oswaldella; Oswaldella tottoni; Antarc*; Antarctic; Antarctica; Ross Sea; Weddell Sea
• Online Access: https://doi.org/10.5281/zenodo.5935025; http://treatment.plazi.org/id/03B887B7A45EFFC2E983FC63FEF29E2D

Oswaldella tottoni Peña Cantero & Vervoort, 1996 (Fig. 17 g–m) Material examined. ANT XV/3 : 48-194 , few stems, up to 120 mm high, with gonothecae; ANT XXI/2 : PS65/121 , several stems, up to 150 mm high, with gonothecae; PS65/276 , few stems, up to 120 mm high, with gonothecae. Remarks. Only known with female gonothecae from its type locality in the Ross Sea (Peña Cantero & Vervoort 1996), although no sex was attributed by the authors. Material examined here let us confirm a patent sexual dimorphism (Fig. 17m). Male gonotheca, 1.3–1.7 mm high x 0.7–0.8 mm maximum width, cylindrical with rounded end, fusiform in lateral view, with distal, circular aperture. Female gonotheca larger, 2.4–3.0 mm high x 1.2 mm maximum width, inverted cone-shaped, flattened in lateral view, with subterminal, oval aperture. Ecology and distribution. Species reported from depths between 256 (Peña Cantero & Vervoort 1996) and 400 m (Peña Cantero et al. 1997a); present material from 244 to 277 m. Circum-Antarctic species (Peña Cantero & Vervoort 2004). Published as part of Soto, Joan J. & Peña, Álvaro L., 2019, Benthic hydroids (Cnidaria, Hydrozoa) from the Weddell Sea (Antarctica), pp. 1-78 in Zootaxa 4570 (1) on page 49, DOI:10.11646/zootaxa.4570.1.1, http://zenodo.org/record/2608527