Different evolutionary histories in two sympatric limpets of the genus Nacella (Patellogastropoda) in the South-western Atlantic coast

A new species of the genusOnchidorisis described from the south-western Atlantic, on the coast of Brazil, in the States of Rio de Janeiro and São Paulo. To date, the genusOnchidorisis known almost exclusively from the northern hemisphere, especially the Atlantic coast of Europe and the Mediterranean Sea. The single previous record from the southern hemisphere isOnchidoris maugeansis, described from Australia. This is the first record of the family Onchidorididae from the coast of Brazil.Onchidoris brasiliensissp. nov. is very similar toOnchidoris depressa, from England and the northern coast of Spain, but is distinguished by the presence of a triangular protuberance on the edge of the inner lateral radular tooth and a wide closed branchial circle with tubercles inside. Furthermore, the egg mass of O.brasiliensissp. nov. contains a single row of eggs, whereas that ofO. depressahas multiple rows.Onchidoris brasiliensissp. nov. has lecithotrophic development, the first record of this type of development in the genus. There is a relationship betweenO. brasiliensissp. nov. and the bryozoanParasmittina protecta.

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Effect of residence times on River Mondego estuary eutrophication vulnerability

Water Science & Technology ◽

10.2166/wst.2001.0786 ◽

2001 ◽

Vol 44 (2-3) ◽

pp. 329-336 ◽

Cited By ~ 6

Author(s):

A. S. Duarte ◽

J. L. Pinho ◽

M. A. Pardal ◽

J. M. Neto ◽

J. P. Vieira ◽

...

Keyword(s):

Atlantic Coast ◽

Management Strategies ◽

Time Variability ◽

Residence Times ◽

The South ◽

Western Atlantic ◽

Environmental Management Strategies ◽

Mondego Estuary ◽

Significant Area ◽

Mixed Systems

The south arm of the Mondego estuary, located in the central western Atlantic coast of Portugal, is almost silted up in the upstream area. So, the water circulation is mostly driven by tides and the tributary river Pranto discharges. Eutrophication has been taking place in this ecosystem during last twelve years, where macroalgae reach a luxuriant development covering a significant area of the intertidal muddy flat. A sampling program was carried out from June 1993 to June 1994. Available data on salinity profiles and on nutrients loading into the south arm were used in order to get a better understanding of the ongoing changes. River Pranto flow discharges, controlled by a sluice, were also monitored. Integral formulations are typically based on assumptions of steady state and well-mixed systems and thus cannot take into account the space and time variability of estuarine residence times, due to river discharge flow, tidal coefficients, discharge(s) location and time of release during the tidal cycle. This work presents the hydrodynamics modelling (2D-H) of this system in order to estimate the residence times variability and to assess their effect on the estuarine eutrophication vulnerability, contributing to better environmental management strategies selection.

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Redescription of Orthopristis ruber and Orthopristis scapularis (Haemulidae: Perciformes), with a hybridization zone off the Atlantic coast of South America

Zootaxa ◽

10.11646/zootaxa.4576.1.5 ◽

2019 ◽

Vol 4576 (1) ◽

pp. 109 ◽

Cited By ~ 1

Author(s):

ALEXANDRE PIRES MARCENIUK ◽

RODRIGO ANTUNES CAIRES ◽

LEONARDO MACHADO ◽

NAJILA NOLIE CATARINE DANTAS CERQUEIRA ◽

RAYLA ROBERTA M. DE S. SERRA ◽

...

Keyword(s):

South America ◽

Nuclear Dna ◽

Atlantic Coast ◽

Morphological Characteristics ◽

Distinct Species ◽

Valid Species ◽

Brazilian Coast ◽

Northern Coast ◽

Western Atlantic ◽

Coloration Patterns

The genus Orthopristis includes seven valid species, three from the western Atlantic and five from eastern Pacific, while the available identification guides and taxonomic keys incorrectly recognize Orthopristis ruber as the only valid species found on the Atlantic coast of South America. Efforts to expand the inventory of fish species from the northern coast of Brazil led to the identification of two distinct species of Orthopristis from Atlantic South America, based on the analysis of coloration patterns and meristic data, as well as DNA. In the present study, the limits of Orthopristis ruber are reviewed, while Orthopristis scapularis is recognized as a valid species for the northern and northeastern coasts of South America. Based on intermediate morphological characteristics and nuclear DNA markers, a hybrid zone was identified off the state of Espírito Santo, on the eastern Brazilian coast. Additionally, considerations are made on the diversity and biogeography of the coastal marine and estuarine fishes found on the Brazilian coast.

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Distribution of saltmarsh plant communities associated with environmental factors along a latitudinal gradient on the south-west Atlantic coast

Journal of Biogeography ◽

10.1111/j.1365-2699.2006.01461.x ◽

2006 ◽

Vol 33 (5) ◽

pp. 888-900 ◽

Cited By ~ 208

Author(s):

J. P. Isacch ◽

C. S. B. Costa ◽

L. Rodriguez-Gallego ◽

D. Conde ◽

M. Escapa ◽

...

Keyword(s):

Environmental Factors ◽

Plant Communities ◽

Latitudinal Gradient ◽

Atlantic Coast ◽

The South ◽

South West

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Growing at the limit: Reef growth sensitivity to climate and oceanographic changes in the South Western Atlantic

Global and Planetary Change ◽

10.1016/j.gloplacha.2021.103479 ◽

2021 ◽

pp. 103479

Author(s):

Guilherme H. Pereira-Filho ◽

Vinícius R. Mendes ◽

Chris T. Perry ◽

Gustavo I. Shintate ◽

Willians C. Niz ◽

...

Keyword(s):

Reef Growth ◽

The South ◽

Western Atlantic

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The wet deposition of trace metals to the western atlantic ocean at the mid-atlantic coast and on Bermuda

Atmospheric Environment (1967) ◽

10.1016/0004-6981(84)90330-5 ◽

1984 ◽

Vol 18 (12) ◽

pp. 2657-2664 ◽

Cited By ~ 95

Author(s):

T.M. Churc ◽

J.M. Tramontano ◽

J.R. Scudlark ◽

T.D. Jickells ◽

J.J. Tokos ◽

...

Keyword(s):

Trace Metals ◽

Atlantic Ocean ◽

Wet Deposition ◽

Atlantic Coast ◽

Western Atlantic ◽

Western Atlantic Ocean

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Taxonomy of Nystiellidae (Caenogastropoda, Epitonioidea) from Brazil, with description of three new species from the South-western Atlantic

Journal of the Marine Biological Association of the United Kingdom ◽

10.1017/s0025315417000984 ◽

2017 ◽

Vol 98 (7) ◽

pp. 1619-1644 ◽

Cited By ~ 1

Author(s):

Alexandre Dias Pimenta ◽

Bruno Garcia Andrade ◽

Ricardo Silva Absalão

Keyword(s):

Rio Grande ◽

Taxonomic Revision ◽

South Atlantic ◽

Shell Morphology ◽

The South ◽

Western Atlantic ◽

North East ◽

The North ◽

Eastern Brazil ◽

North Eastern

A taxonomic revision of the Nystiellidae from Brazil, including samples from the Rio Grande Rise, South Atlantic, was performed based on shell morphology. Five genera and 17 species were recognized. For the richest genus,Eccliseogyra, the three species previously recorded from Brazil were revised:E. brasiliensisandE. maracatu, previously known only from their respective type series, were re-examined. Newly available material ofE. maracatuexpanded the known geographic range of this species to off south-east Brazil.Eccliseogyra nitidais now recorded from north-eastern to south-eastern Brazil, as well as from the Rio Grande Rise. Three species ofEccliseogyraare newly recorded from the South Atlantic:E. monnioti, previously known from the north-eastern Atlantic, occurs off eastern Brazil and on the Rio Grande Rise; its protoconch is described for the first time, confirming its family allocation.Eccliseogyra pyrrhiasoccurs off eastern Brazil and on the Rio Grande Rise, andE. folinioff eastern Brazil. The genusIphitusis newly recorded from the South Atlantic.Iphitus robertsiwas found off northern Brazil, although the shells show some differences from the type material, with less-pronounced spiral keels. Additional new finds showed thatIphitus cancellatusranges from eastern Brazil to the Rio Grande Rise, and Iphitusnotiossp. nov. is restricted to the Rio Grande Rise.Narrimania, previously recorded from Brazil based on dubious records, is confirmed, including the only two living species described for the genus:N. azelotes, previously only known from the type locality in Florida, andN. concinna, previously known from the Mediterranean. A third species,Narrimania raquelaesp. nov. is described from eastern Brazil, diagnosed by its numerous and thinner cancellate sculpture. To the three species ofOpaliopsispreviously known from Brazil, a fourth species,O. arnaldoisp. nov., is added from eastern Brazil, and diagnosed by its very thin spiral sculpture, absence of a varix, and thinner microscopic parallel axial striae.Papuliscala nordestina, originally described from north-east Brazil, is recorded off eastern Brazil and synonymized withP. elongata, a species previously known only from the North Atlantic.

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Distribution, history, and taxonomy of the Thais clade (Gastropoda: Muricidae) in the Neogene of tropical America

Journal of Paleontology ◽

10.1017/s0022336000039731 ◽

2001 ◽

Vol 75 (3) ◽

pp. 697-705 ◽

Cited By ~ 11

Author(s):

Geerat J. Vermeij

Keyword(s):

New Species ◽

South Atlantic ◽

Eastern Pacific ◽

Caribbean Region ◽

Large Species ◽

The South ◽

Western Atlantic ◽

Extinction Rates ◽

Tropical America ◽

The Caribbean

The earliest known members of the Thais clade of rapanine muricid neogastropods comprise four species from the Cantaure Formation (early Miocene: Burdigalian) of Venezuela; three of these species are new. Neorapana rotundata Gibson-Smith et al., 1997, is most closely related to the Recent Pacific Mexican N. tuberculata (Sowerby, 1835), and represents the only known Atlantic occurrence of the genus. Thais brevicula new species is closest to T. callaoensis (Gray, 1828) from the Recent of northern Peru and the Galápagos. A review of the genus Thais indicates that the typical members of this group occur in the South Atlantic, West Africa, and eastern Pacific, but not in the Recent fauna of the southern Caribbean. Stramonita bifida new species is a large species related to the Recent S. haemastoma floridana (Conrad, 1837), which occurs throughout the Caribbean. A review of American species of Stramonita indicates that the taxon S. biserialis (de Blainville, 1832) from the Recent fauna of the eastern Pacific, and the taxon S. h. haemastoma (Linnaeus, 1767), may each be composed of more than one species despite the teleplanic dispersal of their larvae. Stramonita semiplicata new species is closely related to the Recent S. bicarinata (de Blainville, 1832) from the South Atlantic, and represents a lineage that occurred in the Caribbean region until at least the late Miocene. It may have given rise to the eastern Pacific genus Acanthais. The higher diversity and greater antipredatory specialization of eastern Pacific as compared to western Atlantic members of the Thais clade may have resulted from higher post-Miocene rates of speciation and lower extinction rates in the eastern Pacific.

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