Species of Oswaldella Stechow, 1919 (Cnidaria: Hydrozoa: Kirchenpaueriidae) from US Antarctic expeditions, with the description of three new species Author Peña Cantero, A. L. Author Vervoort, W. text Journal of Natural History 2004 2004-04-10 38 805 861 journal article 1464-5262 Oswaldella curiosa Peña Cantero and Vervoort, 1998 Oswaldella curiosa Peña Cantero and Vervoort, 1998: 35–39 , figure 2 ; Peña Cantero and García Carrascosa, 1999: 214 ; Peña Cantero and Marques, 1999: 85 . Material examined . 6/428 , three stems up to 35 mm high. Remarks . The material of this species was previously described and figured by Peña Cantero and Vervoort (1998) . Oswaldella curiosa is well characterized, especially by the shape of the hydrotheca, since it is the only known species of the genus with a completely abcaudally directed hydrothecal aperture. It is also characterized by the absence of mesial inferior nematothecae in the hydrocladial internodes, the absence of a node between cauline apophyses and hydrocladia, and by the presence of a single axillary nematophore in the cauline apophyses (cf. table 1 ). Ecology and distribution . Oswaldella curiosa is known only from the Bransfield Strait area, where it was collected at depths between 662 and 1120 m in January (Peña Cantero and Vervoort, 1998 ).