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The smaller vesicomyid bivalves in the genus Isorropodon (Bivalvia, Vesicomyida...
Rodrigues, Clara F.; Cunha, Marina R.; Olu, Karine; Duperron, SébastienSpecies of Isorropodon are vesicomyid bivalves for which little information is available regarding host phylogeny and bacterial symbioses. In this study we investigated the symbioses in three Isorropodon species from three cold seep areas: Isorropodon bigoti (Gulf of Guinea), Isorropodon megadesmus (Gulf of Cadiz) and Isorropodon perplexum (Eastern Mediterranean). Analysis of bacterial 16S ribosomal RNA gene se...
The effect of depth and sediment type on the spatial distribution of shallow so...
Carvalho, Susana; Cunha, Marina R.; Pereira, Fábio; Pousao-Ferreira, P.; Santos, M. N.; Gaspar, M. B.The present study provides updated information on amphipod assemblages of the southern Portuguese coast, the most south-western part of continental Europe. The influence of depth and sediment type on the spatial distribution of shallow soft-bottom amphipods was tested by means of univariate and multivariate methods. Samples were collected down to 40 m depth within areas ranging from very fine sand to gravel. Th...
Chemosymbiotic bivalves from the mud volcanoes of the Gulf of Cadiz, NE Atlanti...
Oliver, Graham; Rodrigues, Clara F.; Cunha, Marina R.The chemosymbiotic bivalves collected from the mud volcanoes of the Gulf of Cadiz are reviewed. Of the thirteen species closely associated with chemosynthetic settings two Solemyidae, Solemya (Petrasma) elarraichensis sp. n. and Acharax gadirae sp. n., one Lucinidae, Lucinoma asapheus sp. n., and one Vesicomyidae, Isorropodon megadesmus sp. n. are described and compared to close relatives of their respective fa...
A new 'saccamminid' genus (Rhizaria: Foraminifera), from 4400 m water depth in ...
Da Silva, Ana Aranda; Gooday, Andrew J.; Pearse, Richard B.; Cunha, Marina R.We describe Bithekammina occulta, a new monothalamous agglutinated foraminiferan ('saccamminid') collected in multicore samples at 4400 m on the terrace of the lower Nazare Canyon on the Portuguese margin. The test is spherical to oval, up to similar to 400 mu m in length, with a simple circular aperture. The wall has a very smooth surface with a distinct sheen in reflected light. It is <10 mu m thick and compo...
Multigene Molecular Systematics Confirm Species Status of Morphologically Conve...
Silva, Joana Matzen da; Santos, Antonina dos; Cunha, Marina R.; Costa, Filipe O.; Creer, Simon; Carvalho, Gary R.Introduction: In spite of contemporary morphological taxonomy appraisals, apparent high morphological similarity raises uncertainty about the species status of certain Pagurus hermit crabs. This is exemplified between two European species, Pagurus excavatus (Herbst, 1791) and Pagurus alatus (Fabricius 1775), whose species status is still difficult to resolve using morphological criteria alone. Methodology/Princ...
Deep-sea ophiuroids (Echinodermata: Ophiuroidea: Ophiurida) from the Gulf of Ca...
Rodrigues, Clara F.; Paterson, Gordon L. J.; Cabrinovic, Andrew; Cunha, Marina R.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 mor...
New record of "Bathymodiolus" mauritanicus Cosel 2002 from the Gulf of Cadiz (N...
Genio, Luciana; Johnson, Shannon B.; Vrijenhoek, Robert C.; Cunha, Marina R.; Tyler, Paul A.; Kiel, Steffen; Little, Crispin T. S.The "Bathymodiolus" childressi group is the most geographically diverse assemblage of deep-sea mussel species. In this paper we consider several possible hypotheses to explain the present biogeographic distribution of the "B." childressi species complex. Mussels were collected for the first time from mud volcanoes in the Gulf of Cadiz (NE Atlantic Ocean) during the training through research (TTR) 16 research ex...
Application of RAPD DNA fingerprinting in taxonomic identification of amphipods...
Costa, Filipe O.; Cunha, Marina R.; Neuparth, Teresa; Theodorakis, Christopher W.; Costa, M. Helena; Shugart, Lee R.In this study randomly amplified polymorphic DNA (RAPD) fingerprinting is proposed for species identification of Gammarus, based on the electrophorestic position of amplified DNA bands. Three common marine amphipods of European estuaries-G. chevreuxi, G insensibilis and G. locusta were profiled using ten RAPD primers, accompanied by a careful morphological identification. Nine of these primers produced a very d...
New and little known corophiidean amphipods from the 'Lucky Strike' hydrotherma...
Myers, Alan A.; Cunha, Marina R.Two species of corophiid amphipods are described from the `Lucky Strike' hydrothermal vent on the Mid-Atlantic Ridge near the Acores. One species, Bonnierella compar sp. nov is new to science, the other, Autonoe longicornis has not been reported since the original description of a single female in 1909. Full descriptions are provided of the new species, and of the previously unknown male of A. longicornis. ; I...
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