A Modern High-Energy Siliciclastic–Carbonate Platform: Continental Shelf Adjacent to Northern Rio Grande Do Norte State, Northeastern Brazil

2008 ◽  
pp. 177-190 ◽  
Author(s):  
HELENICE VITAL ◽  
KARL STATTEGGER ◽  
VENERANDO E. AMARO ◽  
KLAUS SCHWARZER ◽  
EUGÊNIO P. FRAZÃO ◽  
...  
Keyword(s):  
Continental Shelf ◽  
Carbonate Platform ◽  
Rio Grande ◽  
High Energy ◽  
Northeastern Brazil ◽  
Northern Rio Grande

scholarly journals New records of two species of Acanthocarpus Stimpson, 1871 (Crustacea: Decapoda: Calappidae) in northeastern Brazil

2018 ◽  
Vol 2 (1) ◽  
pp. 60
Author(s):  
Flavio De Almeida Alves-Jr. ◽  
Ângela Ferreira Pereira ◽  
Marina de Sá Leitão Câmara de Araújo
Keyword(s):  
Continental Shelf ◽  
Key Words ◽  
Geographic Distribution ◽  
New Records ◽  
Rio Grande ◽  
Northeastern Brazil ◽  
Brazilian Coast ◽  
Potiguar Basin ◽  
Brachyuran Crabs ◽  
Brazilian Northeast

<p style="text-align: justify;">O caranguejo do gênero <em>Acanthocarpus</em> Stimpson, 1871 tem hábitos bentônicos, ocorrendo na plataforma continental em substratos de cascalhos ou lamosos com ocorrência em todos os oceanos, especialmente entre 20-522 m de profundidade. Neste trabalho, nós reportamos a ocorrência de <em>Acanthocarpus alexandri</em> Stimpson, 1871 e <em>A. bispinosus</em> A. Milne-Edwards, 1880 para a Bacia Potiguar (Rio Grande do Norte), localizada na região nordeste do Brasil e aumentamos o conhecimento sobre aspectos distribucionais das espécies para a costa brasileira.</p><p style="text-align: justify;"><strong>Palavras chave</strong>: Bacia Potiguar, registros adicionais, distribuição geográfica, caranguejos braquiúros, plataforma continental.</p><p style="text-align: justify;"><strong>Abstract</strong>: The gladiator box crab of the genus <em>Acanthocarpus</em> Stimpson, 1871 has benthonic habits, occurring in continental shelf on gravel or muddy substrates with occurrence in all oceans, especially between 20-522 m depth. In this paper we report the occurrence of <em>Acanthocarpus alexandri</em> Stimpson, 1871 and <em>A. bispinosus</em> A. Milne-Edwards, 1880 from the Potiguar Basin (Rio Grande do Norte), located in the Brazilian northeast and increase the knowledge about the distributional aspects of this species from Brazilian coast.</p><p style="text-align: justify;"><strong>Key words</strong>: Potiguar Basin, further records, geographic distribution, brachyuran crabs, continental shelf.</p>

scholarly journals First record of basket stars Astrocyclus caecilia (Lütken, 1856) and Astrophyton muricatum (Lamarck, 1816) (Echinodermata, Ophiuroidea, Euryalida) for the state of Rio Grande do Norte, northeastern Brazil

Check List ◽  
2015 ◽  
Vol 11 (1) ◽  
pp. 1541
Author(s):  
Anne Isabelley Gondim ◽  
Thelma Lúcia Pereira Dias ◽  
Martin Lindsey Christoffersen
Keyword(s):  
Continental Shelf ◽  
Rio Grande ◽  
First Record ◽  
The State ◽  
Outer Margin ◽  
Northeastern Brazil

This paper reports the first record of Astrocyclus caecilia for northeastern Brazil and Astrophyton muricatum for the state of Rio Grande do Norte. The studied specimens were captured accidentally by a fisherman using a fishing rod at a depth below 100 m over the continental shelf of the state of Rio Grande do Norte. Such accidental captures stress our meager knowledge on our fauna from the outer margin of the continental shelf in northeastern Brazil. With these records we fill a gap in the known distribution of those species.

A New Species of Justicia (Acanthaceae: Acanthoideae: Justicieae) from Northeastern Brazil

2020 ◽  
Vol 45 (2) ◽  
pp. 328-333
Author(s):  
Camila Alcantara ◽  
Gleison Soares ◽  
Francisco de Assis Ribeiro dos Santos ◽  
Marccus Alves
Keyword(s):  
New Species ◽  
Rio Grande ◽  
Morphological Characters ◽  
Northeastern Brazil ◽  
Distribution Map ◽  
Key To Species ◽  
A New Species

Abstract—Justicia rubrobracteata, a new species from northeastern Brazil, is described and illustrated. The new species is morphologically similar to J. aequilabris due to its shrubby habit, and terminal and axillary spicate inflorescences with red flowers. However, J. rubrobracteata is differentiated mainly by the shape and color of its bracts and bracteoles as well as an orangish macula in the corolla, and a torulose capsule. In addition, J. rubrobracteata is only known from northeastern Brazil, from the states of Paraíba and Rio Grande do Norte, while J. aequilabris is widely distributed in Bolivia, Brazil, and Paraguay. A table with the main morphological characters of both species is included, as well as photographs, a key to species of Justicia for the states of Paraíba and Rio Grande do Norte in northeastern Brazil, a distribution map of both species, and conservation data for the new species.

GEOMORPHIC AND INCISION HISTORY OF THE NORTHERN RIO GRANDE RIVER GORGE NEAR QUESTA, NEW MEXICO

2016 ◽  
Author(s):  
Travis W. Clow ◽  
◽  
Whitney M. Behr ◽  
Mark Helper ◽  
Peter Gold ◽  
...  
Keyword(s):  
New Mexico ◽  
Rio Grande ◽  
History Of ◽  
Rio Grande River ◽  
Northern Rio Grande

The conundrum of biont-free substrates on a high-energy continental shelf: Burial and scour on Nantucket Shoals, Great South Channel

2020 ◽  
pp. 107089
Author(s):  
Eric N. Powell ◽  
Roger L. Mann ◽  
M. Chase Long ◽  
Jeremy R. Timbs ◽  
Kelsey M. Kuykendall
Keyword(s):  
Continental Shelf ◽  
High Energy

Earthquake Hazard Estimation in Areas of Low Historical Seismicity: A Focus on the Northern Rio Grande Rift, Colorado and New Mexico

1990 ◽  
Vol 6 (4) ◽  
pp. 657-680 ◽  
Author(s):  
Charles E. Glass
Keyword(s):  
New Mexico ◽  
Gaussian Model ◽  
Rio Grande ◽  
Earthquake Hazard ◽  
Weibull Model ◽  
Historical Seismicity ◽  
Rio Grande Rift ◽  
Earthquake Activity ◽  
Sangre De Cristo ◽  
Northern Rio Grande

Estimates of the probability of future earthquake activity are difficult to make in areas where historical seismicity may be low or absent, but where young fault scarps attest to recent or ongoing tectonism. Three non-Poisson models, a Weibull model, a Gaussian model and a lognormal model, are used to estimate the earthquake hazard for one such area, the northern Rio Grande Rift. This portion of the Rio Grande Rift displays numerous Holocene faults attesting to ongoing tectonism, but displays essentially no historical seismicity. The earthquake hazard for the Sangre de Cristo fault zone from Taos, New Mexico to Salida, Colorado calculated using these models is remarkably consistent (probability of at least one Mo = 7 earthquake in the next 50 years ∼ 2.5 × 10−3), with increased hazard for the Sangre de Cristo fault in north San Luis Valley (∼5.0×10−3) and near Taos (∼1.0×10−2) due to the long holding times along these segments.

Spawning aggregation sites of the cubera snapper, Lutjanus cyanopterus, on the continental shelf of Bahia state, Northeastern Brazil

2021 ◽  
Vol 242 ◽  
pp. 106037
Author(s):  
Priscilla Nogueira Malafaia ◽  
Aline Rocha França ◽  
George Olavo
Keyword(s):  
Continental Shelf ◽  
Northeastern Brazil ◽  
Spawning Aggregation

scholarly journals Mesozoic dinosaurs from Brazil and their biogeographic implications

2011 ◽  
Vol 83 (1) ◽  
pp. 23-60 ◽  
Author(s):  
Jonathas S. Bittencourt ◽  
Max C. Langer
Keyword(s):  
North Africa ◽  
Rio Grande ◽  
Species Level ◽  
Northeastern Brazil ◽  
Late Triassic ◽  
Close Correspondence ◽  
Rio Grande Do Sul ◽  
Central Brazil ◽  
South Central ◽  
Nomina Dubia

The record of dinosaur body-fossils in the Brazilian Mesozoic is restricted to the Triassic of Rio Grande do Sul and Cretaceous of various parts of the country. This includes 21 named species, two of which were regarded as nomina dubia, and 19 consensually assigned to Dinosauria. Additional eight supraspecific taxa have been identified based on fragmentary specimens and numerous dinosaur footprints known in Brazil. In fact, most Brazilian specimens related to dinosaurs are composed of isolated teeth and vertebrae. Despite the increase of fieldwork during the last decade, there are still no dinosaur body-fossils of Jurassic age and the evidence of ornithischians in Brazil is very limited. Dinosaur faunas from this country are generally correlated with those from other parts of Gondwana throughout the Mesozoic. During the Late Triassic, there is a close correspondence to Argentina and other south-Pangaea areas. Mid-Cretaceous faunas of northeastern Brazil resemble those of coeval deposits of North Africa and Argentina. Southern hemisphere spinosaurids are restricted to Africa and Brazil, whereas abelisaurids are still unknown in the Early Cretaceous of the latter. Late Cretaceous dinosaur assemblages of south-central Brazil are endemic only to genus or, more conspicuously, to species level, sharing closely related taxa with Argentina, Madagascar, Indo-Pakistan and, to a lesser degree, continental Africa.

scholarly journals Feather mites (Acari, Astigmata) associated with birds in an Atlantic Forest fragment in Northeastern Brazil

2015 ◽  
Vol 75 (3) ◽  
pp. 726-735 ◽  
Author(s):  
HM Silva ◽  
FA Hernandes ◽  
M Pichorim
Keyword(s):  
Atlantic Forest ◽  
Bird Species ◽  
Rio Grande ◽  
Neotropical Region ◽  
Species Level ◽  
Northeastern Brazil ◽  
Forest Fragment ◽  
Visual Examination ◽  
Feather Mites ◽  
First Time

AbstractThe present study reports associations between feather mites (Astigmata) and birds in an Atlantic Forest fragment in Rio Grande do Norte state, in Brazil. In the laboratory, mites were collected through visual examination of freshly killed birds. Overall, 172 individuals from 38 bird species were examined, between October 2011 and July 2012. The prevalence of feather mites was 80.8%, corresponding to 139 infested individuals distributed into 30 species and 15 families of hosts. Fifteen feather mite taxa could be identified to the species level, sixteen to the genus level and three to the subfamily level, distributed into the families Analgidae, Proctophyllodidae, Psoroptoididae, Pteronyssidae, Xolalgidae, Trouessartiidae, Falculiferidae and Gabuciniidae. Hitherto unknown associations between feather mites and birds were recorded for eleven taxa identified to the species level, and nine taxa were recorded for the first time in Brazil. The number of new geographic records, as well as the hitherto unknown mite-host associations, supports the high estimates of diversity for feather mites of Brazil and show the need for research to increase knowledge of plumicole mites in the Neotropical region.

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