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Janussen, D.; Tabachnick, K.R.; Tendal, O.S. (2004). Deep-sea Hexactinellida (Porifera) of the Weddell Sea. Deep-Sea Research Part II. 51: 1857-1882.
127149
Janussen, D.; Tabachnick, K.R.; Tendal, O.S.
2004
Deep-sea Hexactinellida (Porifera) of the Weddell Sea.
Deep-Sea Research Part II
51: 1857-1882.
Publication
Available for editors  PDF available [request]
New Hexactinellida from the deep Weddel Sea are described. This moderately diverse hexactinellid fauna includes 14 species belonging to 12 genera, ofwhich five species and one subgenus are new to science: Periphragella antarctica n. sp., Holascus pseudostellatus n. sp., Caulophacus (Caulophacus) discohexactinus n. sp., C. (Caulodiscus) brandti n. sp., C. (Oxydiscus) weddelli n. sp., and C. (Oxydiscus) n. subgen. So far, 20 hexactinellid species have been reported from the deep Weddell Sea, 15 are known from the northern part and 10 only from here, while 10 came from the southern area, and five of these only from there. However, this apparent high ‘‘endemism’’ ofAntarctic hexactinellid sponges is most likely the result ofsevere undersampling of the deep-sea fauna. We find no reason to believe that a division between an oceanic and a more continental group ofspecies exists. The current poor database indicates that a substantial part of the deep hexactinellid fauna of the Weddell Sea is shared with other deep-sea regions, but it does not indicate a special biogeographic relationship with any other ocean.
Antarctic
Systematics, Taxonomy
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Antarctic Lower Bathyal Province for Acanthascus (Rhabdocalyptus) australis (Topsent, 1901) 
Antarctic Lower Bathyal Province for Bathydorus spinosus Schulze, 1886 
Antarctic Lower Bathyal Province for Caulophacus (Caulophacus) discohexactinus Janussen, Tabachnick & Tendal, 2004 
Antarctic Lower Bathyal Province for Chonelasma choanoides Schulze & Kirkpatrick, 1910 
Antarctic Lower Bathyal Province for Chonelasma choanoides Schulze & Kirkpatrick, 1910 
Antarctic Lower Bathyal Province for Chonelasma choanoides Schulze & Kirkpatrick, 1910 
Antarctic Lower Bathyal Province for Chonelasma choanoides Schulze & Kirkpatrick, 1910 
Antarctic Lower Bathyal Province for Malacosaccus coatsi Topsent, 1910 
Antarctic Lower Bathyal Province for Periphragella antarctica Janussen, Tabachnick & Tendal, 2004 
Antarctic Lower Bathyal Province for Rossella racovitzae Topsent, 1901 
Antarctic Lower Bathyal Province for Rossella racovitzae Topsent, 1901 
Antarctic Lower Bathyal Province for Rossella racovitzae Topsent, 1901 
Antarctic Lower Bathyal Province for Sympagella johnstoni (Schulze, 1886) 
Antarctic Lower Bathyal Province for Sympagella johnstoni (Schulze, 1886) 
Antarctic Lower Bathyal Province for Sympagella johnstoni (Schulze, 1886) 
Antarctica East Abyssal Province for Bathydorus spinosus Schulze, 1886 
Antarctica West Abyssal Province for Caulophacus (Caulodiscus) brandti Janussen, Tabachnick & Tendal, 2004 
Antarctica West Abyssal Province for Caulophacus (Oxydiscus) weddelli Janussen, Tabachnick & Tendal, 2004 
Antarctica West Abyssal Province for Caulophacus (Oxydiscus) weddelli Janussen, Tabachnick & Tendal, 2004 
Antarctica West Abyssal Province for Holascus obesus Schulze, 1904 
Antarctica West Abyssal Province for Holascus pseudostellatus Janussen, Tabachnick & Tendal, 2004 
Antarctica West Abyssal Province for Malacosaccus pedunculatus Topsent, 1910 
Argentine Basin Abyssal Province for Holascus pseudostellatus Janussen, Tabachnick & Tendal, 2004 
Weddell Sea for Acanthascus (Rhabdocalyptus) australis (Topsent, 1901) 
Weddell Sea for Bathydorus spinosus Schulze, 1886 
Weddell Sea for Bathyxiphus subtilis Schulze, 1899  (doubtful)
Weddell Sea for Caulophacus (Caulodiscus) brandti Janussen, Tabachnick & Tendal, 2004 
Weddell Sea for Caulophacus (Caulophacus) discohexactinus Janussen, Tabachnick & Tendal, 2004 
Weddell Sea for Chonelasma choanoides Schulze & Kirkpatrick, 1910 
Weddell Sea for Holascus obesus Schulze, 1904 
Weddell Sea for Holascus pseudostellatus Janussen, Tabachnick & Tendal, 2004 
Weddell Sea for Periphragella antarctica Janussen, Tabachnick & Tendal, 2004 
Weddell Sea for Sympagella johnstoni (Schulze, 1886) 


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