New records of demosponges (Porifera) from the South Orkney Islands (Antarctica) with a checklist for the region Author Schejter, Laura Author Cristobo, Javier Author Ríos, Pilar text Zootaxa 2024 2024-01-23 5403 4 401 430 http://dx.doi.org/10.11646/zootaxa.5403.4.1 journal article 10.11646/zootaxa.5403.4.1 1175-5326 10562154 C2EAB19C-07CB-4013-9C93-D25259EA2673 Myxodoryx hanitschi ( Kirkpatrick, 1907 ) ( Fig. 7g –k ) Restricted synonymy: Lissomyxilla hanitschi Kirkpatrick, 1907 . Material examined: 5 specimens collected at stations 2 ( SOI ; 60°53'S , 44°33'W ; 218 m ; 20/2/2014 ; MACNIn 44395; IEO-CSIC Col.), 11 ( SOI ; 60°53'S , 42°35'W ; 487 m ; 10/3/2014 ; IEO-CSIC Col.), 13 ( SOI ; 60°49'S , 45°29'W ; 353 m ; 11/3/2014 ; MACN-In 44496; IEO-CSIC Col.) and 18 ( SOI ; 60°47,561'S , 45°36,854'W ; 96 m ; 10/3/2012 ; MACN-In 44497; IEO-CSIC Col.) . Description: Massive, globular to elongate specimens, beige-yellow in colour ( Fig. 7g ). Spicules are smooth styles 290–590 µm by 10–15 µm, acanthostyles 240–325 µm with a characteristic pattern of spines (see also Göcke & Janussen, 2013 ) and tornotes of 300–370 µm by 5 µm ( Fig. 7h–k ). Remarks: This species is endemic to Antarctica . It was previously recorded by Kirkpatrick (1907) , Hentschel (1914) , Koltun (1964) , Campos et al. (2007) , Göcke & Janussen (2013) and Fernández et al. (2021) . This is the first record for the SOI.