Benthic hydroids (Cnidaria, Hydrozoa) from the Weddell Sea (Antarctica) Author Soto, Joan J. Author Peña, Álvaro L. text Zootaxa 2019 2019-03-22 4570 1 1 78 journal article 27992 10.11646/zootaxa.4570.1.1 66601a1e-ba16-41b2-b182-0fd80e75ccba 1175-5326 2608527 EF369E98-EBD9-4647-B081-65AD1794A27C Filellum cf. magnificum Peña Cantero, Svoboda & Vervoort, 2004 ( Fig. 6g ) Material examined. ANT XV/3 : 48-150 , some hydrothecae, on E. scotti ; 48-220 , some hydrothecae, on Sy. exochus ; 48-276 , several hydrothecae, on Sc. nana ; ANT XXI/2 : PS65/166 , numerous hydrothecae, on O. erratum ; PS65/274 , numerous hydrothecae, on Staurotheca nonscripta Peña Cantero, Svoboda & Vervoort, 1997 . Remarks. In spite of the absence of coppinia, the size of the hydrotheca and the size of the nematocysts perfectly agree with previous reports ( Peña Cantero 2010 , Peña Cantero et al. 2004, Soto Àngel & Peña Cantero 2015 ). However, in agreement with Peña Cantero et al. (1998), the identification of infertile material of Filellum is tentative. Cnidome consisting of large microbasic mastigophores [range 17.5–19.0 x 4.5–6.0 µm, mean 18.1±0.6 x 5.4±0.8 µm (n=4)] and small microbasic euryteles [range 6.0–7.5 x 2.5–3.5 µm, mean 6.9±0.4 x 2.8±0.3 µm (n=13)]. Ecology and distribution. Previously known from 85 ( Peña Cantero 2010 ) to 640 m (Peña Cantero et al. 2004); present material collected at depths from 236 to 758 m . Only known from Peter I Island ( Peña Cantero 2010 ) and the Weddell Sea (Peña Cantero et al. 2004; material examined).