Title Do bipolar distributions exist in marine sponges? Stylocordyla chupachups sp. nv. (Porifera, Hadromerida) from the Weddell Sea (Antarctic), previously reported as S. borealis (Lovén, 1868)
Author Uriz, M.J.; Gili, J.; Orejas, C.; Perez-Porro, A.R.
Author Affil Uriz, M.J., CSIC, Centre d'Estadi Avancats de Blates, Blanes, Spain. Other: CSIC, Institut de Ciencies del Mar, Spain
Source Polar Biology, 34(2), p.243-255. Publisher: Springer-Verlag, Berlin, Germany. ISSN: 0722-4060
Publication Date Feb. 2011
Notes In English. 50 refs. GeoRef Acc. No: 308822
Index Terms Arctic Ocean; polar regions; Southern Ocean--Weddell Sea; biogeography; classification; ecology; Invertebrata; new taxa; physiology; Porifera; Southern Ocean; taxonomy; Weddell Sea
Abstract Sponges are the dominant invertebrates in many Antarctic communities, where they play a decisive structural function thanks to their abundance and large sizes. However, current knowledge on Antarctic sponges remains poor even with respect to basic aspects such as taxonomy. Here, we report on an Antarctic species of the genus Stylocordyla, which has been recorded for a long time under the name of the boreal S. borealis due to spicule and growth habit similarities. A thorough study of dense populations of the only Stylocordyla species known up to now from the eastern zone of the Weddell Sea as well as the re-examination of several specimens (including the type material) of S. borealis has allowed us to assess the variability of the boreal species and to confirm that the austral species is not S. borealis (Loven, 1868) but a new species of Stylocordyla, different from the other congeners recorded from southern latitudes. The new species S. chupachups commonly dwells on horizontal or slighted sloped hard bottoms of the continental shelf of Weddell Sea, from 100 m to below 400 m depth, although the densest populations usually occur between 150 and 300 m. It is a pioneer species in areas that have been scoured by icebergs, and thus its presence may be considered an indicator of recent colonisation.
URL http://hdl.handle.net/10.1007/s00300-010-0876-y
Publication Type journal article
Record ID 91256