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 Halecium interpolatum Ritchie, 1907 (*) Halecium ovatum Peña Cantero, 2009: 1747 , fig. 2f. Remarks. Halecium interpolatum is known off Buckle Island, where it was collected at a depth of 80 m ( Peña Cantero 2009 ).