Three species of Reteporella (Bryozoa: Cheilostomata) in a diapiric and mud volcano field of the Gulf of Cádiz, with the description of Reteporella victori n. sp.

Zootaxa ◽  
2018 ◽  
Vol 4375 (1) ◽  
pp. 90 ◽  
Author(s):  
LAÍS V. RAMALHO ◽  
CARLOS M. LÓPEZ-FÉ ◽  
JOSÉ LUIS RUEDA
Keyword(s):  
New Species ◽  
Cold Water ◽  
Mud Volcanoes ◽  
Gulf Of Cadiz ◽  
Ne Atlantic ◽  
Invertebrate Fauna ◽  
Gulf Of Cádiz ◽  
Ne Atlantic Ocean ◽  
The Common ◽  
A New Species

Diapirs and mud volcanoes (MVs) are formed by the migration and extrusion of fluids and mud to the seafloor, respectively. In the Gulf of Cádiz there are ca. 60 MVs and several diapirs with different environmental conditions and seepage activity. Previous studies, mainly on MVs, have demonstrated that the invertebrate fauna associated with these seafloor structures can be very diverse, including chemosymbiotic species, mostly mollusks and frenulate polychaetes, as well as vulnerable suspension feeders, such as cold-water corals and sponges, among others. Previous studies of the bryozoan fauna in this area have recorded species belonging to 28 families. One of these families is Phidoloporidae, which comprises 27 genera worldwide, including the common Rhynchozoon, Reteporellina, and Reteporella. In the present study, two species belonging to Reteporella are redescribed, and a new species is described from diapirs and MVs on the shelf and slope of the Gulf of Cádiz. The samples were collected during several oceanographic expeditions carried out by the Instituto Español de Oceanografia. This genus is well represented in the NE Atlantic Ocean and the Mediterranean Sea, and our study extends its occurrence on MVs and diapirs fields of the Gulf of Cádiz. 

scholarly journals Tubiclavoides striatum gen. nov. et sp. nov. (Cnidaria: Hydrozoa) a new bathyal hydroid from the Gulf of Cadiz, north-east Atlantic Ocean

2007 ◽  
Vol 87 (2) ◽  
pp. 421-428 ◽  
Author(s):  
Carlos J. Moura ◽  
Marina R. Cunha ◽  
Peter Schuchert
Keyword(s):  
New Species ◽  
Atlantic Ocean ◽  
Cold Water ◽  
Full Description ◽  
Mud Volcanoes ◽  
Gulf Of Cadiz ◽  
North East ◽  
New Family ◽  
Gulf Of Cádiz ◽  
A New Species

Tubiclavoides striatum, a new species of an athecate hydroid, was found on mud volcanoes, inactive carbonate chimneys, and cold-water coral stands in the Gulf of Cadiz (south-western Iberian Peninsula, Atlantic Ocean). The new family Tubiclavoididae and the new genus Tubiclavoides are proposed to accommodate the new species. The new hydroid is characterized by scattered filiform tentacles, sporosacs developing among the tentacles and hydrocauli covered with striated perisarc, often subdivided into imbricating cones. A full description and illustrations are provided, as well as some notes on the ecology and distribution of the new species.

scholarly journals Leptostracans (Crustacea: Phyllocarida) from mud volcanoes at the Gulf of Cadiz (NE Atlantic) with description of a new species of Sarsinebalia Dahl, 1985

2021 ◽  
Vol 736 ◽  
pp. 102-136
Author(s):  
Juan Moreira ◽  
Patricia Esquete ◽  
Marina R. Cunha
Keyword(s):  
New Species ◽  
Organic Substrates ◽  
Mud Volcanoes ◽  
Gulf Of Cadiz ◽  
Ne Atlantic ◽  
The Third ◽  
Gulf Of Cádiz ◽  
Mandibular Palp ◽  
First Time ◽  
A New Species

Three leptostracan species (Crustacea: Phyllocarida) are reported from mud volcanoes at the Moroccan margin of the Gulf of Cadiz (NE Atlantic). Nebalia strausi Risso, 1826 and N. abyssicola Fage, 1929 were found in experimentally deployed organic substrates in Mercator, Meknès and Darwin mud volcanoes; N. abyssicola was also found among bathymodiolin bivalves and is recorded for the first time in the Atlantic Ocean. The third species was collected from the Gemini mud volcanoes and is described herein as Sarsinebalia ledoyeri sp. nov. The new species is characterised by having the eyes provided with ommatidia and lacking pigment, the ventral margin of the eye is concave along distal half, the antennular scale is more than twice as long as wide, the second article of the mandibular palp bears one seta on lateral surface about 0.5 times as long as the article and one subterminal seta longer than the third article, the distal article of the maxilla II endopod is about 1.8 times as long as the proximal article, the maxilla II exopod is clearly longer than the endopod proximal article, the lateral margin of the pleopod I exopod lacks setae and the posterodorsal border of pleonites VI–VII is provided with rounded to pointed denticles.

scholarly journals Deep-sea ophiuroids (Echinodermata: Ophiuroidea: Ophiurida) from the Gulf of Cadiz (NE Atlantic)

Zootaxa ◽  
2011 ◽  
Vol 2754 (1) ◽  
pp. 1 ◽  
Author(s):  
CLARA F. RODRIGUES ◽  
GORDON L. J. PATERSON ◽  
ANDREW CABRINOVIC ◽  
MARINA R. CUNHA
Keyword(s):  
Deep Sea ◽  
Cold Water ◽  
Cold Seep ◽  
Mud Volcanoes ◽  
Gulf Of Cadiz ◽  
Ne Atlantic ◽  
Morphological Adaptations ◽  
Gulf Of Cádiz ◽  
High Species Richness ◽  
Distinct Separation

The Ophiuroidea collected from mud volcanoes and adjacent bathyal environments from the Gulf of Cadiz are reviewed. Thirteen species from six families—Ophiacanthidae, Ophiactidae, Amphiuridae, Amphilepididae, Ophiuridae and Ophiolepididae—were identified. A direct relationship to the chemosynthetic assemblages has not been established as the ophiuroids found in the mud volcanoes do not appear to have novel morphological adaptations and also occur in non-reducing environments. The ophiuroid fauna from the Gulf of Cadiz differs from other cold seep regions not only by the high species richness but also because members of Amphiuridae are dominant both in number of species and abundance. One species previously unknown, Ophiopristis gadensis sp. nov., (Ophiacanthidae) was collected from a dead cold-water coral thicket at the flank of a mud volcano and differs from its congeners in the type of disk spines which are more rugose and not smooth as in most of the other species, the presence of the thickened integument in larger specimens and the distinct separation between the oral papillae and the second oral tentacle scales.

scholarly journals Isotopic evidence (87Sr/86Sr, δ7Li) for alteration of the oceanic crust at deep-rooted mud volcanoes in the Gulf of Cadiz, NE Atlantic Ocean

2009 ◽  
Vol 73 (18) ◽  
pp. 5444-5459 ◽  
Author(s):  
Florian Scholz ◽  
Christian Hensen ◽  
Anja Reitz ◽  
Rolf L. Romer ◽  
Volker Liebetrau ◽  
...  
Keyword(s):  
Atlantic Ocean ◽  
Oceanic Crust ◽  
Mud Volcanoes ◽  
Gulf Of Cadiz ◽  
Ne Atlantic ◽  
Isotopic Evidence ◽  
Gulf Of Cádiz ◽  
Ne Atlantic Ocean

Macroinfaunal Communities on mud Volcanoes in the Gulf of Cádiz (NE Atlantic): Preliminary Results

2016 ◽  
Vol 32 (2) ◽  
pp. 65-74
Author(s):  
Candela Pérez ◽  
Santiago Parra ◽  
Joaquín Valencia-Vila ◽  
Carmen Vázquez ◽  
Juan Fernández ◽  
...  
Keyword(s):  
Mud Volcanoes ◽  
Gulf Of Cadiz ◽  
Ne Atlantic ◽  
Preliminary Results ◽  
Gulf Of Cádiz

scholarly journals Paleohydrological changes over the last 50 ky in the central Gulf of Cadiz: Complex forcing mechanisms mixing multi-scale processes

2016 ◽  
Author(s):  
Aurélie Penaud ◽  
Frédérique Eynaud ◽  
Antje Helga Luise Voelker ◽  
Jean-Louis Turon
Keyword(s):  
North Atlantic ◽  
Regional Climate ◽  
Fine Tuning ◽  
General Context ◽  
Gulf Of Cadiz ◽  
Ne Atlantic ◽  
Cell Dynamics ◽  
Gulf Of Cádiz ◽  
Ne Atlantic Ocean ◽  
Forcing Mechanisms

Abstract. New dinoflagellate cyst (dinocyst) analyses were carried out at high-resolution in core MD99-2339, retrieved from a contouritic field in the central part of the Gulf of Cadiz, for the Marine Isotope Stage (MIS) 3 interval, allowing to discuss paleohydrological changes over the last 50 ky in the subtropical NE Atlantic Ocean. Some index dinocyst taxa, according to their (paleo) ecological significance, shed light on significant sea-surface changes. Superimposed on the general decreasing pattern of dinocyst export to the seafloor over the last 50 ky, paralleling the general context of decreasing aeolian dust fertilization, a complex variability in dinocyst assemblages was detected at millennial timescale. Enhanced fluvial discharges occurred during Greenland Interstadials (GI) and especially GI 1, 8 and 12, while enhanced upwelling cell dynamics were suggested during the Last Glacial Maximum and Heinrich Stadials. Finally, during the early Holocene, and more specifically during the Sapropel 1 interval (around 7–9 ka BP), we evidenced a strong decrease in dinocyst fluxes, which occurred synchronously to a strong reduction in Mediterranean Outflow Water strength, and that we attributed to an advection of warm and nutrient-poor subtropical North Atlantic Central Waters. Over the last 50 ky, our study thus allows capturing and documenting the fine tuning existing between terrestrial and marine realms in North Atlantic subtropical latitudes, not only in response to the regional climate pattern, but also to monsoonal forcing interfering during precession-driven northern hemisphere insolation maxima. This mechanism, well expressed during the Holocene, is superimposed on the pervasive role of the obliquity as a first major trigger for explaining migration of dinocyst productive centres in the NE Atlantic margin to the subtropical (temperate) latitudes during glacial (interglacial) periods.

scholarly journals Anobothrus amourouxisp. nov., a new species of Ampharetidae (Polychaeta) from the Capbreton Canyon (Bay of Biscay, NE Atlantic Ocean)

2015 ◽  
Vol 95 (5) ◽  
pp. 961-969 ◽  
Author(s):  
Paulo Bonifácio ◽  
Nicolas Lavesque ◽  
Guy Bachelet ◽  
Julio Parapar
Keyword(s):  
New Species ◽  
Atlantic Ocean ◽  
Lateral View ◽  
Identification Key ◽  
Bay Of Biscay ◽  
Frontal View ◽  
Ne Atlantic ◽  
Ne Atlantic Ocean ◽  
A New Species

A new species of Ampharetidae,Anobothrus amourouxisp. nov., has been identified from bathyal depths of the Capbreton Canyon, Bay of Biscay (NE Atlantic Ocean). This new species is characterized by inner branchiae with transversal ciliated ridges, notochaetae from modified eighth thoracic unciniger with hirsute tips, uncini from thoracic unciniger with 6–7 teeth in lateral view arranged in two vertical rows in frontal view, fused segments II + III with paleae from SII and reduced notopodia without chaetae from SIII. An identification key for all hitherto described species of the genusAnobothrusis provided.

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