Additions to knowledge of the biodiversity of benthic hydroids (Cnidaria: Hydrozoa) in the Balleny Islands (Antarctica) Author Peña Cantero, Álvaro L. text Zootaxa 2021 2021-05-04 4966 3 321 336 journal article 6521 10.11646/zootaxa.4966.3.4 67f48cde-c614-4032-8c46-e21235b87124 1175-5326 4736691 F4CABF6C-1993-4112-A03E-4DBF708BB025 Billardia subrufa ( Jäderholm, 1904 ) (*) Billardia subrufa Peña Cantero, 2009: 1749 . Remarks. Billardia subrufa is known from depths between 96 and 702 m off Sturge Island ( Peña Cantero 2009 ).