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.

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 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.

New species of chemosymbiotic clams (Bivalvia: Vesicomyidae and Thyasiridae) from a putative ‘seep’ in the Hatton–Rockall Basin, north-east Atlantic

2013 ◽  
Vol 94 (2) ◽  
pp. 389-403 ◽  
Author(s):  
P. Graham Oliver ◽  
Jim Drewery
Keyword(s):  
New Species ◽  
North Atlantic ◽  
Cold Seeps ◽  
Mud Volcanoes ◽  
North East ◽  
The North ◽  
Hydrocarbon Seeps ◽  
Morphological Differences ◽  
North And South ◽  
A New Species

Two new species of chemosymbiotic bivalves are described from a poorly localized site in the Hatton–Rockall Basin at 1187–1200 m. The new speciesIsorropodon mackayisp. nov. is compared with others of the genus from the North and South Atlantic. A novel anatomical structure, suggested to be a secondary gill, is described. The second bivalveThyasira scotiaesp. nov. is compared with other species known to inhabit cold seeps in the Atlantic and most resemblesThyasira sarsi. Other than the minor morphological differences, the bathyal range and presence of commensal polychaetes,Antonbrunnia, never reported inT. sarsisupport the erection of a new species. In the North AtlanticIsorropodonspecies and the larger thyasirids, with the exception ofT. sarsi, are typically found at hydrocarbon seeps associated with pockmarks and mud volcanoes. If correct, then this is the first indication of active sulphidic seepage in the Hatton–Rockall Basin.

scholarly journals A new species of pea crab from south-western Europe (Crustacea, Decapoda, Brachyura): species description, geographic distribution and population structure with an identification key to European Pinnotheridae

2019 ◽  
Vol 99 (5) ◽  
pp. 1141-1152 ◽  
Author(s):  
Jose A. Cuesta ◽  
J. E. García Raso ◽  
Pere Abelló ◽  
Elena Marco-Herrero ◽  
Luis Silva ◽  
...  
Keyword(s):  
New Species ◽  
Geographic Distribution ◽  
Western Europe ◽  
Female Size ◽  
Gulf Of Cadiz ◽  
Larval Stages ◽  
Unknown Species ◽  
Gulf Of Cádiz ◽  
Pea Crab ◽  
A New Species

AbstractAfter the recent detection, by both morphology and DNA barcodes, of the larval stages of an unknown species of pea crab (Pinnotheres sp.) in European waters, adults of this crab are herein reported and described as a new species. The current known geographic distribution of the species comprises the Gulf of Cádiz in the eastern Atlantic and the adjacent Mediterranean waters of the south of the Iberian Peninsula (Alboran Sea), where this crab is well-established inside the anomiid bivalve Anomia ephippium. In the Gulf of Cádiz, the species displayed a relatively high prevalence: on average, 55.6–77.7%, in A. ephippium samples. The dominant demographic categories of the new species were soft females (61.8–77.0%) with fewer males (17.7–21.10%). Most of the host bivalves carried only one crab; in bivalves harbouring two crabs, heterosexual pairs were collected more frequently than expected by chance, which suggests that they could be mated pairs. A strong correlation between host size and soft female size was found (r = 0.73, P < 0.01) indicating that space availability within hosts seems to be relevant in determining the size of the sedentary phase of the new crab species.

scholarly journals Apseudomorph tanaidaceans (Crustacea: Peracarida) from mud-volcanoes in the Gulf of Cadiz (North-east Atlantic)

Zootaxa ◽  
2011 ◽  
Vol 2919 (1) ◽  
pp. 1 ◽  
Author(s):  
MAGDALENA BŁAŻEWICZ-PASZKOWYCZ ◽  
ROGER N. BAMBER ◽  
MARINA R. CUNHA
Keyword(s):  
Deep Sea ◽  
Morphological Features ◽  
The Other ◽  
Mud Volcanoes ◽  
Gulf Of Cadiz ◽  
East Atlantic ◽  
North East ◽  
Gulf Of Cádiz ◽  
Associated Species ◽  
High Diversity

Faunal collections from mud-volcano sites in the Gulf of Cadiz, at depths between 355 and 3061 m, have revealed a high diversity (and in some cases high density) of tanaidaceans. A previous paper has described some of the tanaidomorph species found. Records of apseudomorph species from deep-sea chemosynthetic habitats are almost non-existent. The present study reports on seven apseudomorph species from five different genera from this material; two of the species, one in each of the genera Sphyrapus and Pseudosphyrapus are new to science, although there was insufficient material available to describe fully the Pseudosphyrapus species. Two of the other species are reported herein for only the second time. A neotype is erected for Apseudes setiferus Băcescu, and a lectotype for Sphyrapus malleolus Norman & Stebbing; these two, plus Atlantapseudes nigrifrons Băcescu and Fageapseudes retusifrons Richardson are redescribed. The habitus of Apseudes grossimanus is figured. None of the taxa appear to show any morphological features specifically adapted to the peculiar habitat around mud-volcanoes. The genus Collossella is relegated to the synonymy of Fageapseudes. The nonchemosynthetic-habitat-associated species Apseudes coriolis is moved to Taraxapseudes.

New tanaidomorph Tanaidacea (Crustacea: Peracarida) from submarine mud-volcanoes in the Gulf of Cadiz (North-east Atlantic)

Zootaxa ◽  
2011 ◽  
Vol 2769 (1) ◽  
pp. 1 ◽  
Author(s):  
MAGDALENA BŁAŻEWICZ-PASZKOWYCZ ◽  
ROGER N BAMBER ◽  
MARINA R CUNHA
Keyword(s):  
Hydrothermal Vents ◽  
Cold Seep ◽  
Cold Seeps ◽  
Mud Volcanoes ◽  
Gulf Of Cadiz ◽  
East Atlantic ◽  
Present Material ◽  
North East ◽  
Gulf Of Cádiz ◽  
High Diversity

Faunal collections from mud-volcano sites in the Gulf of Cadiz, at depths between 355 and 3061 m, have revealed a high diversity (and in some cases high density) of tanaidaceans. The present study reports on nine new tanaidomorph species from eight different genera from this material. These include representatives of genera known elsewhere from non-ventassociated deep-sea habitats, but notably only the second and third (respectively) representatives of two genera, Coalecerotanais and Cristatotanais, known previously from cold-seep-habitats in the Gulf of Mexico. The genus Spinitanaopsis is synonymized with Cristatotanais. The tanaidacean records to date from hydrothermal vents or cold seeps are collated as a context for the present material. The possibilities of habitat-endemism in tanaidacean taxa associated with reducing environments and their biogeography are discussed.

Tanaidacea (Crustacea, Peracarida) of the North-east Atlantic: the Agathotanaidae of the AFEN, BIOFAR and BIOICE projects, with a description of a new species of Paragathotanais Lang

Zootaxa ◽  
2010 ◽  
Vol 2730 (1) ◽  
pp. 1 ◽  
Author(s):  
GRAHAM J. BIRD
Keyword(s):  
New Species ◽  
Cold Water ◽  
Bottom Temperature ◽  
East Atlantic ◽  
Bathymetric Range ◽  
North East ◽  
The North ◽  
Water Region ◽  
The Status ◽  
A New Species

The tanaidacean fauna of the Iceland-Faroes-Shetlands sector of the North-east Atlantic was studied using material from the BIOFAR, BIOICE and AFEN surveys. Seven agathotanaid species were recorded from the genera Agathotanais, Paragathotanais and Paranarthrura, a total comparable to those from a similar bathymetric range in the Rockall-Biscay area and the Gulf of Mexico. A new species of Paragathotanais is described. All records of this family were from benthic stations with a mean bottom temperature of >= 2 degrees C, with none from the 'cold-water' region north of the Iceland-Shetlands ridge complex. An analysis of North-east Atlantic agathotanaid sex-ratios shows that these are not highly skewed in favour of females and are consistent with the status of the males as relatively non-dimorphic and long-lived entities.

A new species ofTritonia(Opisthobranchia: Nudibranchia: Tritoniidae) from the tropical South Atlantic Ocean

2013 ◽  
Vol 94 (3) ◽  
pp. 579-585 ◽  
Author(s):  
Felipe de Vasconcelos Silva ◽  
Victor Manuel De Azevedo ◽  
Helena Matthews-Cascon
Keyword(s):  
New Species ◽  
Atlantic Ocean ◽  
South Atlantic ◽  
South Atlantic Ocean ◽  
Genital Opening ◽  
North East ◽  
White Band ◽  
The Family ◽  
The Right ◽  
A New Species

A new species of the family Tritoniidae is described from the tropical South Atlantic Ocean. The animal was found off north-east Brazil.Tritonia khaleesisp. nov. is up to 12 mm long, with a slender white body, of which the notum is covered with one broad white band extending from between the eyes and veil to the tail; veil with 4 velar appendages; retractable white rhinophores; rhinophoral sheath with fleshy extension; seven pairs of branchial plumes; the anus is located between the 3rd and 4th gills on the right side, and the genital opening is under the 2nd gill. Internally,T. khaleesisp. nov. is distinguished from other tritoniids by jaws with 10–14 rows of denticles on the inner lips, absence of stomach plates and the radular formula 32 × 2–5.1.1.1.2–5 teeth.Tritonia khaleesisp. nov. is the onlyTritoniathat possesses a unicuspid rachidian tooth as an adult.

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.

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