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First deep-sea Hamigera (Demospongiae: Porifera) species associated with Cold-Water Corals (CWC) on antipodal latitudes of the world

AuthorsSantín, Andreu CSIC ORCID ; Grinyó, Jordi CSIC ORCID; Uriz, María Jesús CSIC ORCID ; Gili, Josep Maria CSIC ORCID ; Puig, Pere CSIC ORCID
KeywordsClementsville Seamount
Blanes Canyon
New species
Cold-Water 30 Corals
Macquire Ridge
New Zealand
Mediterranean Sea
Issue DateOct-2020
PublisherPergamon Press
CitationDeep Sea Research Part I: Oceanographic Research Papers 164: 103325 (2020)
AbstractCold-water corals (CWC) are known to be deep-sea biodiversity hotspots, yet there is still a huge knowledge gap regarding their associated fauna. As so, CWC ecosystems pose as a perfect environment for the discovery of new species. In this context two new species of Hamigera (Demospongiae) have been recorded associated with CWC in antipodal parts of the world: Hamigera bibiloniae sp. nov. from the Blanes Canyon (north-western Mediterranean Sea) and Hamigera kellyae sp. nov. from the Clementsville Seamount (Macquire Ridge, New Zeeland). Both species represent first deep-sea records of the previously shallow-water restricted Hamigera, and mostly differ from of the previously considered shallow water genus in their huge spicule size, mostly doubling that of shallow-water congeneric species. Furthermore, the current geographical distribution of Hamigera, being only present in the Mediterranean and Pacific areas, might suggest a Tethyan affinity of H. bibiloniae sp. nov. proposing a potential role of deep-sea habitats as climatic refugees.
Publisher version (URL)https://doi.org/10.1016/j.dsr.2020.103325
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