Oswaldella tottoni Pena Cantero & Vervoort 1996
- Dataset
- Benthic hydroids (Cnidaria, Hydrozoa) from the Weddell Sea (Antarctica)
- Rank
- SPECIES
Classification
- kingdom
- Animalia
- phylum
- Cnidaria
- class
- Hydrozoa
- order
- Leptothecata
- family
- Kirchenpaueriidae
- genus
- Oswaldella
- species
- Oswaldella tottoni
biology_ecology
Ecology and distribution. Species reported from depths between 256 (Peña Cantero & Vervoort 1996) and 400 m (Peña Cantero et al. 1997 a); present material from 244 to 277 m. Circum-Antarctic species (Peña Cantero & Vervoort 2004).
description
(Fig. 17 g – m)
discussion
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. 17 m). 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.
materials_examined
Material examined. ANT XV / 3: 48 - 194, few stems, up to 120 mm high, with gonothecae; ANT XXI / 2: PS 65 / 121, several stems, up to 150 mm high, with gonothecae; PS 65 / 276, few stems, up to 120 mm high, with gonothecae.