FIGURE 9. Schizoplumularia elegans n. sp. A‒B, internodes with long nematothecae from same hydroc... more FIGURE 9. Schizoplumularia elegans n. sp. A‒B, internodes with long nematothecae from same hydrocladium (MUSORSTOM 6, stn DW 457); A, proximalmost internode of a hydrocladium; B, penultimate internode of same hydrocladium. C, holotype (BIOCAL 1, stn CP 110), gonotheca. Scales: a‒c, 0.1 mm.
Human activities in continental margins have progressively increased during the last decades, thr... more Human activities in continental margins have progressively increased during the last decades, threatening vulnerable marine ecosystems in many continental slopes, such as cold-water coral reefs, seamounts and canyons. In order to protect these ecosystems and ensure the sustainable management of resources, countries and organizations should endorse effective policy actions. However, nowadays about only 0.8% of the oceans and 6% of the territorial seas belong to conservation area systems, a lack of protection that is particularly acute in deep-sea waters. The Mauritanian continental margin is the outcome of exceptional marine features, with abrupt canyon systems, sediment slides and a giant carbonate-mounds barrier occurring together. Mauritanian waters have both tropical and subtropical origins, being affected by coastal and offshore upwelling that leads to elevated productivity and abundant fishery resources. Soft-bottom habitats hold high diversity of species, and hard-bottoms sust...
Synthese of the research and training activities on Cape Verde benthos developed in the framework... more Synthese of the research and training activities on Cape Verde benthos developed in the framework of CCLME-FAO project by the EcoAfrik team after 2014.EcoAfrik; EAF-NANSEN Mentoring Program (FAO); CCLME-FAO projec
Echinoderms are the most important taxa of megabenthic invertebrates on the Mauritanian deep-sea ... more Echinoderms are the most important taxa of megabenthic invertebrates on the Mauritanian deep-sea floor, both in density and biomass . The phylum is represented by approximately 82 species, Ophiuroidea and Asteroidea being the most diverse classes (25 and 23 species, respectively), followed by Holothuroidea and Echinoidea (19 and 12 species, respectively). Crinoidea is poorly represented by only three species. Holothuroidea (sea cucumbers) are, undoubtedly, the main component of deep Mauritanian echinoderms, accounting for 85.5% of numerical abundance and 96.0% of biomass. Species belonging to Echinothurioida are dominant among the sea urchins . The most common echinoderm species are Phormosoma placenta , Enypniastes eximia , Psilaster cassiope , Benthothuria funebris, Ophiernus alepidotus , Pseudarchaster gracilis gracilis and Ophiura flagellata . The Mauritanian echinoderm fauna are mostly composed of species with Atlantic distribution (80.5%) and a smaller group of wide distributi...
Valencia, 28-31 Marzo 2007 In contrast to the Weddell and Ross seas, where a lot of surveys have ... more Valencia, 28-31 Marzo 2007 In contrast to the Weddell and Ross seas, where a lot of surveys have been carried out, the marine benthic fauna of the third large Antarctic sea, the Bellingshuasen sea, have remained virtually unknonw until nowadays. Thanks to two Spanish research programmes named ‘BENTART-2003’ and ‘BENTART-2006’, it have been finally observed that the epibenthos along the Bellingshausen sea is scarce and its composition different to those of other High Antarctic marine areas.
Genus <i>Schizoplumularia</i> n. gen. (Fig. 1) <b>Diagnosis.</b> Plumular... more Genus <i>Schizoplumularia</i> n. gen. (Fig. 1) <b>Diagnosis.</b> Plumulariid hydroids having an erect, polysiphonic, branched or unbranched main axis lacking apophyses and hydrocladia except at proximal end, main axis geniculate, at least in younger parts of colony. Tubes of main axis giving rise to ultimate branches, equivalent to hydrocauli. Primary axial tube at base of main axis with apophyses and hydrocladia, giving rise to secondary axial tubes before diverging laterally from main axis to form first ultimate branch (proximalmost hydrocaulus of colony). As with primary axial tube, secondary axial tubes giving rise to new secondary axial tubes before diverging laterally from main axis, and so on; apophyses and hydrocladia absent on all axial tubes beyond the primary one. Hydrorhiza where known a root-like mass of intertwining tubules adhering to sandy sediment. Ultimate branches equivalent in morphology to hydrocauli of <i>Plumularia</i> in be...
Deep Sea Research Part I: Oceanographic Research Papers
Abstract In this paper, two new species of the genus Rosalinda found growing on bivalves from Wes... more Abstract In this paper, two new species of the genus Rosalinda found growing on bivalves from West African cold-water coral mounds are described. Rosalinda nowaldi sp. nov. was found on Acesta angolensis (Adam & Knudsen, 1955) off northern Angola, and Rosalinda lundalvi sp. nov. on Acesta excavata (Fabricius, 1779) off Mauritania. Both new species have a similar cnidome, but they can be easily differentiated by the structure of their hydrorhizae and number of tentacles of the hydranths. The differences between the new species and all other species included in the genus Rosalinda on the basis of their morphology, habitat, and geographical distribution were also established.
One new genus (Schizoplumularia) and three new species (Schizoplumularia vervoorti, S. geniculata... more One new genus (Schizoplumularia) and three new species (Schizoplumularia vervoorti, S. geniculata and S. elegans) of plumulariids are recognized and described from large collections of plumularioid hydroids collected in New Caledonia and vicinity during several French expeditions. During taxonomic studies of these hydroids, colonies were compared with type material of Plumularia insignis Allman, 1883 and several other similar species-group taxa. As a result, three of the latter (P. flabellum Allman, 1883, P. conjuncta Billard, 1913, and P. billardi nom. nov.) are recognized as valid in addition to P. insignis. The binomen P. billardi is a replacement name for P. insignis var. gracilis Billard, 1913. In being elevated to the rank of species in this work, it becomes an invalid junior primary homonym of several others having the same name.
Forty-six species of the superfamily Plumularioidea (Hydrozoa, Cnidaria) and some material identi... more Forty-six species of the superfamily Plumularioidea (Hydrozoa, Cnidaria) and some material identified to the generic level, collected by the CANCAP and Mauritania-II expeditions of the Rijkmuseum van Natuurlijke Historie (now Nationaal Natuurhistorisch Museum) in the period 1976-1988, are described, as well as two other species that were used in the present study. In addition to the descriptions, synonymy, variability and
Three new species of Alcyonium collected by the Spanish Antarctic Expeditions &quot;Antártida... more Three new species of Alcyonium collected by the Spanish Antarctic Expeditions &quot;Antártida 8611&quot; and &quot;Bentart 95&quot; are described and figured: Alcyonium paucilobulatum, A. grandis and A. southgeorgiensis. Another two species, A. antarcticum Wright &amp;amp; Studer, 1889, and Alcyonium sollasi Wright &amp;amp; Studer, 1889, were also collected in the same area.
FIGURE 9. Schizoplumularia elegans n. sp. A‒B, internodes with long nematothecae from same hydroc... more FIGURE 9. Schizoplumularia elegans n. sp. A‒B, internodes with long nematothecae from same hydrocladium (MUSORSTOM 6, stn DW 457); A, proximalmost internode of a hydrocladium; B, penultimate internode of same hydrocladium. C, holotype (BIOCAL 1, stn CP 110), gonotheca. Scales: a‒c, 0.1 mm.
Human activities in continental margins have progressively increased during the last decades, thr... more Human activities in continental margins have progressively increased during the last decades, threatening vulnerable marine ecosystems in many continental slopes, such as cold-water coral reefs, seamounts and canyons. In order to protect these ecosystems and ensure the sustainable management of resources, countries and organizations should endorse effective policy actions. However, nowadays about only 0.8% of the oceans and 6% of the territorial seas belong to conservation area systems, a lack of protection that is particularly acute in deep-sea waters. The Mauritanian continental margin is the outcome of exceptional marine features, with abrupt canyon systems, sediment slides and a giant carbonate-mounds barrier occurring together. Mauritanian waters have both tropical and subtropical origins, being affected by coastal and offshore upwelling that leads to elevated productivity and abundant fishery resources. Soft-bottom habitats hold high diversity of species, and hard-bottoms sust...
Synthese of the research and training activities on Cape Verde benthos developed in the framework... more Synthese of the research and training activities on Cape Verde benthos developed in the framework of CCLME-FAO project by the EcoAfrik team after 2014.EcoAfrik; EAF-NANSEN Mentoring Program (FAO); CCLME-FAO projec
Echinoderms are the most important taxa of megabenthic invertebrates on the Mauritanian deep-sea ... more Echinoderms are the most important taxa of megabenthic invertebrates on the Mauritanian deep-sea floor, both in density and biomass . The phylum is represented by approximately 82 species, Ophiuroidea and Asteroidea being the most diverse classes (25 and 23 species, respectively), followed by Holothuroidea and Echinoidea (19 and 12 species, respectively). Crinoidea is poorly represented by only three species. Holothuroidea (sea cucumbers) are, undoubtedly, the main component of deep Mauritanian echinoderms, accounting for 85.5% of numerical abundance and 96.0% of biomass. Species belonging to Echinothurioida are dominant among the sea urchins . The most common echinoderm species are Phormosoma placenta , Enypniastes eximia , Psilaster cassiope , Benthothuria funebris, Ophiernus alepidotus , Pseudarchaster gracilis gracilis and Ophiura flagellata . The Mauritanian echinoderm fauna are mostly composed of species with Atlantic distribution (80.5%) and a smaller group of wide distributi...
Valencia, 28-31 Marzo 2007 In contrast to the Weddell and Ross seas, where a lot of surveys have ... more Valencia, 28-31 Marzo 2007 In contrast to the Weddell and Ross seas, where a lot of surveys have been carried out, the marine benthic fauna of the third large Antarctic sea, the Bellingshuasen sea, have remained virtually unknonw until nowadays. Thanks to two Spanish research programmes named ‘BENTART-2003’ and ‘BENTART-2006’, it have been finally observed that the epibenthos along the Bellingshausen sea is scarce and its composition different to those of other High Antarctic marine areas.
Genus <i>Schizoplumularia</i> n. gen. (Fig. 1) <b>Diagnosis.</b> Plumular... more Genus <i>Schizoplumularia</i> n. gen. (Fig. 1) <b>Diagnosis.</b> Plumulariid hydroids having an erect, polysiphonic, branched or unbranched main axis lacking apophyses and hydrocladia except at proximal end, main axis geniculate, at least in younger parts of colony. Tubes of main axis giving rise to ultimate branches, equivalent to hydrocauli. Primary axial tube at base of main axis with apophyses and hydrocladia, giving rise to secondary axial tubes before diverging laterally from main axis to form first ultimate branch (proximalmost hydrocaulus of colony). As with primary axial tube, secondary axial tubes giving rise to new secondary axial tubes before diverging laterally from main axis, and so on; apophyses and hydrocladia absent on all axial tubes beyond the primary one. Hydrorhiza where known a root-like mass of intertwining tubules adhering to sandy sediment. Ultimate branches equivalent in morphology to hydrocauli of <i>Plumularia</i> in be...
Deep Sea Research Part I: Oceanographic Research Papers
Abstract In this paper, two new species of the genus Rosalinda found growing on bivalves from Wes... more Abstract In this paper, two new species of the genus Rosalinda found growing on bivalves from West African cold-water coral mounds are described. Rosalinda nowaldi sp. nov. was found on Acesta angolensis (Adam & Knudsen, 1955) off northern Angola, and Rosalinda lundalvi sp. nov. on Acesta excavata (Fabricius, 1779) off Mauritania. Both new species have a similar cnidome, but they can be easily differentiated by the structure of their hydrorhizae and number of tentacles of the hydranths. The differences between the new species and all other species included in the genus Rosalinda on the basis of their morphology, habitat, and geographical distribution were also established.
One new genus (Schizoplumularia) and three new species (Schizoplumularia vervoorti, S. geniculata... more One new genus (Schizoplumularia) and three new species (Schizoplumularia vervoorti, S. geniculata and S. elegans) of plumulariids are recognized and described from large collections of plumularioid hydroids collected in New Caledonia and vicinity during several French expeditions. During taxonomic studies of these hydroids, colonies were compared with type material of Plumularia insignis Allman, 1883 and several other similar species-group taxa. As a result, three of the latter (P. flabellum Allman, 1883, P. conjuncta Billard, 1913, and P. billardi nom. nov.) are recognized as valid in addition to P. insignis. The binomen P. billardi is a replacement name for P. insignis var. gracilis Billard, 1913. In being elevated to the rank of species in this work, it becomes an invalid junior primary homonym of several others having the same name.
Forty-six species of the superfamily Plumularioidea (Hydrozoa, Cnidaria) and some material identi... more Forty-six species of the superfamily Plumularioidea (Hydrozoa, Cnidaria) and some material identified to the generic level, collected by the CANCAP and Mauritania-II expeditions of the Rijkmuseum van Natuurlijke Historie (now Nationaal Natuurhistorisch Museum) in the period 1976-1988, are described, as well as two other species that were used in the present study. In addition to the descriptions, synonymy, variability and
Three new species of Alcyonium collected by the Spanish Antarctic Expeditions &quot;Antártida... more Three new species of Alcyonium collected by the Spanish Antarctic Expeditions &quot;Antártida 8611&quot; and &quot;Bentart 95&quot; are described and figured: Alcyonium paucilobulatum, A. grandis and A. southgeorgiensis. Another two species, A. antarcticum Wright &amp;amp; Studer, 1889, and Alcyonium sollasi Wright &amp;amp; Studer, 1889, were also collected in the same area.
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