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NameSitjà, C.; Maldonado, M. 2014. New and rare sponges from the deep shelf of the Alboran Island (Alboran Sea, Western Mediterranean). Zootaxa 3760: 141–179.
SourceID172970
Type Publication
Full textAvailable for editors  PDF available [request]
AbstractThe sponge fauna from the deep shelf (70 to 200 m) of the Alboran Island (Alboran Sea, Western Mediterranean) was investigated using a combination of ROV surveys and collecting devices in the frame of the EC LIFE+ INDEMARES Grant aimed to designate marine areas of the Nature 2000 Network within Spanish territorial waters. From ROV surveys and 351 examined specimens, a total of 87 sponge species were identified, most belonging in the Class Demospongiae, and one belonging in the Class Hexactinellida. Twenty six (29%) species can be regarded as either taxonomically or faunistically relevant. Three of them were new to science (Axinella alborana nov. sp.; Axinella spatula nov. sp.; Endectyon filiformis nov. sp.) and 4 others were Atlantic species recorded for the first time in the Mediterranean Sea (Jaspis eudermis Lévi & Vacelet, 1958; Hemiasterella elongata Topsent, 1928; Axinella vellerea Topsent, 1904; Gelliodes fayalensis Topsent, 1892). Another outstanding finding was a complete specimen of Rhabdobaris implicata Pulitzer-Finali, 1983, a species only known from its holotype, which had entirely been dissolved for its description. Our second record of the species has allowed a neotype designation and a restitution of the recently abolished genus Rhabdobaris Pulitzer-Finally, 1983, also forcing a slight modification of the diagnosis of the family Bubaridae. Additionally, 12 species were recorded for the first time from the shelf of the Alboran Island, including a few individuals of the large hexactinellid Asconema setubalense Kent, 1877 that provided the second Mediterranean record of this "North Atlantic" hexactinellid. ROV explorations also revealed that sponges are an important component of the deep-shelf benthos, particularly on rocky bottoms, where they make peculiar sponge gardens characterized by a wide diversity of small, erect species forming a dense "undergrowth" among a scatter of large sponges and gorgonians. The great abundance and the taxonomic singularities of the sponge fauna occurring in these deep-shelf bottoms strongly suggest these habitats to be considered within the environmental protection of the Nature 2000 Network.
Geographical
term
Mediterranean
Bibliographical
term
Systematics, Taxonomy
Taxonomic
term
Porifera
Taxa
(17)
Checked: verified by a taxonomic editorAsconema setubalense Kent, 1870 (additional source)
Checked: verified by a taxonomic editorAxinella alborana Sitjà & Maldonado, 2014 (original description)
Checked: verified by a taxonomic editorAxinella flustra Topsent, 1892 (taxonomy source)
Checked: verified by a taxonomic editorAxinella infundibuliformis (Linnaeus, 1759) (taxonomy source)
Checked: verified by a taxonomic editorAxinella minuta Lévi, 1957 (additional source)
Checked: verified by a taxonomic editorAxinella pumila Babiç, 1922 (taxonomy source)
Checked: verified by a taxonomic editorAxinella spatula Sitjà & Maldonado, 2014 (original description)
Checked: verified by a taxonomic editorAxinella vaceleti Pansini, 1984 (taxonomy source)
Checked: verified by a taxonomic editorAxinella vasonuda Topsent, 1904 (taxonomy source)
Checked: verified by a taxonomic editorAxinella vellerea Topsent, 1904 (taxonomy source)
Checked: verified by a taxonomic editorDesmacella annexa Schmidt, 1870 (additional source)
Checked: verified by a taxonomic editorDesmacella inornata (Bowerbank, 1866) (additional source)
Checked: verified by a taxonomic editorDragmatella aberrans (Topsent, 1890) (additional source)
Checked: verified by a taxonomic editorHamacantha (Vomerula) falcula (Bowerbank, 1874) (additional source)
Checked: verified by a taxonomic editorJaspis eudermis Lévi & Vacelet, 1958 (additional source)
Checked: verified by a taxonomic editorRhabdobaris Pulitzer-Finali, 1983 (redescription)
Checked: verified by a taxonomic editorRhabdobaris implicata Pulitzer-Finali, 1983 (redescription)
Distributions
(8)
Alboran Sea for Checked: verified by a taxonomic editorAxinella alborana Sitjà & Maldonado, 2014
Alboran Sea for Checked: verified by a taxonomic editorAxinella spatula Sitjà & Maldonado, 2014
Alboran Sea for Checked: verified by a taxonomic editorAxinella vellerea Topsent, 1904
Alboran Sea for Checked: verified by a taxonomic editorDesmacella annexa Schmidt, 1870
Alboran Sea for Checked: verified by a taxonomic editorDesmacella inornata (Bowerbank, 1866)
Alboran Sea for Checked: verified by a taxonomic editorDragmatella aberrans (Topsent, 1890)
Alboran Sea for Checked: verified by a taxonomic editorHamacantha (Vomerula) falcula (Bowerbank, 1874)
Alboran Sea for Checked: verified by a taxonomic editorJaspis eudermis Lévi & Vacelet, 1958
Specimens
(6)
Holotype MNCN MNCN-Sp145-BV33B, identified as Axinella spatula Sitjà & Maldonado, 2014
Holotype MNCN MNCN-Sp155-DR44A, identified as Axinella alborana Sitjà & Maldonado, 2014
Neotype MNCN MNCN-Sp23-BV14, locality Alboran Sea, identified as Rhabdobaris implicata Pulitzer-Finali, 1983
Syntype MONA MOM-040044, locality South European Atlantic Shelf, identified as Axinella flustra Topsent, 1892
Syntype MONA MOM-040272, locality Azores Canaries Madeira, identified as Axinella flustra Topsent, 1892
Syntype MONA MOM-040631, locality Azores Canaries Madeira, identified as Axinella vellerea Topsent, 1904
Edit
history
Date   action   by
2014-02-05 12:26:04Z  created  Dohrmann, Martin
2014-02-07 19:31:55Z  changed  van Soest, Rob
2014-02-10 16:14:08Z  changed  Boury-Esnault, Nicole
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