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 sp. Material examined. ANT XV/3 : 48-4 , some hydrothecae, on E. generale ; 48-5 , some hydrothecae, on sponge; 48- 27 , numerous hydrothecae, on E. generale , Halecium exaggeratum Peña Cantero, Boero & Piraino, 2013 and S. lobata ; 48-44 , several hydrothecae, on Halecium banzare Watson, 2008 , S. lobata and Sy. exochus ; 48-50 , several hydrothecae, on C. hicksoni and Sc. nana ; 48-77 , numerous hydrothecae, on Halecium jaederholmi Vervoort, 1972 ; 48-168 , some hydrothecae, on Sy. exochus ; 48-194 , numerous hydrothecae, on Sc. nana ; 48-220 , some hydrothecae, on C. hicksoni , H. interpolatum and Symplectoscyphus liouvillei ( Billard, 1914 ) ; 48-222 , numerous hydrothecae, on Sc. nana and Sy. weddelli ; 48-223 , numerous hydrothecae, on Sc. nana and Symplectoscyphus plectilis ( Hickson & Gravely, 1907 ) ; 48-276 , some hydrothecae, on Halecium cf. antarcticum and Sy. weddelli ; ANT XVII/3 : 111-9 , few hydrothecae, on R. antarcticum ; 111-19 , numerous hydrothecae, on H. interpolatum , L. dumosa , R. antarcticum , Sc. unifurcata , Sy. exochus , Symplectoscyphus naumovi Blanco, 1969 and Sy. weddelli ; ANT XXI/2 : PS65/39 , numerous hydrothecae, on C. hicksoni , Sc. nana , St. glomulosa , S. lobata , Sy. exochus , Sy. glacialis and Sy. plectilis ; PS65/121 , numerous hydrothecae, on Sy. glacialis , Sy. plectilis and the hydrorhiza of an undetermined hydroid; PS65/132 , numerous hydrothecae, on O. erratum ; PS65/166 , several hydrothecae, on Sy. exochus ; PS65/174 , several hydrothecae, on Sy. exochus ; PS65/175 , numerous hydrothecae, on S. lobata and Sy. naumovi ; PS65/237 , several hydrothecae, on Sy. exochus , Sy. glacialis and Sy. weddelli ; PS65/248 , numerous hydrothecae, on H. incertus , Sy. curvatus , Sy. glacialis , Sy. plectilis and octocoral; PS65/253 , several hydrothecae, on S. lobata ; PS65/265 , several hydrothecae, on Sy. glacialis ; PS65/274 , some hydrothecae, on St. nonscripta and Sy. plectilis ; PS65/276 , several hydrotheca on Sy. exochus and Sy. vanhoeffeni ; PS65/278 , several hydrothecae, on H. secundum , L. dumosa and sponge; PS65/292 , numerous hydrothecae, on Staurotheca antarctica Hartlaub, 1904 and St. nonscripta . Remarks. Material included here comprises a huge amount of small-sized hydrothecae, with 100-150 µm in diameter of aperture, and provided with striae. The material could correspond, at least in part, to F. antarcticum . However, in agreement with Peña Cantero et al. (2004) and Marques et al. (2011) , the small-sized Filellum from Antarctic waters are not identifiable in the absence of coppinia, and therefore it precludes a proper identification of material examined here. Ecology and distribution. Material examined was collected at depths between 62 and 598 m .