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

2017 ◽  
Vol 98 (7) ◽  
pp. 1619-1644 ◽  
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.

scholarly journals Growing season precipitation in Finland under recent and projected climate

2010 ◽  
Vol 10 (7) ◽  
pp. 1563-1574 ◽  
Author(s):  
J. S. Ylhäisi ◽  
H. Tietäväinen, ◽  
P. Peltonen-Sainio ◽  
A. Venäläinen ◽  
J. Eklund ◽  
...  
Keyword(s):  
Crop Production ◽  
Early Stage ◽  
Regional Climate ◽  
Growing Season ◽  
Agricultural Crop ◽  
Sampling Errors ◽  
The South ◽  
North East ◽  
The North ◽  
North Eastern

Abstract. The past and projected future precipitation sum in May–September for two areas in Finland, one located in the south-west (SW) and the other in the north-east (NE), is studied using 13 regional climate simulations and three observational datasets. The conditions in the present-day climate for agricultural crop production are far more favourable in the south-western part of the country than the more continental north-eastern Finland. Based on a new high-resolution observational precipitation dataset for Finland (FMI_grid), with a resolution of 10×10 km, the only statistically significant past long-term (1908–2008) precipitation tendencies in the two study regions are positive. Differences between FMI_grid and two other observational datasets during 1961–2000 are rather large in the NE, whereas in the SW the datasets agree better. Observational uncertainties stem from the interpolation and sampling errors. The projected increases in precipitation in the early stage of the growing season would be most favourable for agricultural productivity, but the projected increases in August and September might be harmful. Model projections for the future indicate a statistically significant increase in precipitation for most of the growing season by 2100, but the distribution of precipitation within the growing season is not necessarily the most optimal.

The Flint Gravel Deposit of Orleigh Court, Buckland Brewer, North Devon

1937 ◽  
Vol 74 (7) ◽  
pp. 309-316 ◽  
Author(s):  
Inkermann Rogers ◽  
Brian Simpson
Keyword(s):  
Average Distance ◽  
Good Deal ◽  
Left Bank ◽  
The South ◽  
North East ◽  
The North ◽  
South West ◽  
North Eastern ◽  
Low Levels ◽  
Gravel Deposit

The deposit to be described is situated at Orleigh Court, in the parish of Buckland Brewer, some four miles west of south from Bideford, where it rests unconformably on the steeply dipping Upper Culm sandstones. Its greatest extent is from Orleigh Mill to Yeo Bridge, a distance of about three-quarters of a mile in a northwest to south-east direction, and from this line it extends to the south-west for an average distance of about one-third of a mile, only exceeding that amount to the south of the Higher Lodge. The only extensive section was seen in the Rookery, where 25 feet of material rest on a yellow clay. The highest point reached by the deposit, to the south-west of the Higher Lodge, is about 400 feet above O.D. From this point it slopes to the north-east, extending down to about the 100 ft. contour on the left bank of the River Yeo. It is possible that the north-eastern boundary does not reach such low levels as those indicated on the map, Text-fig. 1, for it is difficult to distinguish the original gravel from relatively recent hill wash; and, without a good deal of trenching or augering, it would not be possible to determine the boundary more closely than has been done in the present work.

A Homestead Moat at Nuthampstead, Hertfordshire

1946 ◽  
Vol 26 (3-4) ◽  
pp. 138-144
Author(s):  
Audrey Williams
Keyword(s):  
Outer Edge ◽  
Royal Commission ◽  
The South ◽  
North West ◽  
North East ◽  
The North ◽  
North Eastern ◽  
Ancient Monuments ◽  
The Village ◽  
Western Half

A small moated site in Scales Park near the village of Nuthampstead, Hertfordshire (fig. 1), has lately been examined by the Ancient Monuments Department of the Ministry of Works. It lies just within the Hertfordshire-Essex boundary, four miles north-east of Buntingford and eight miles north-west of Bishop's Stortford. On the O.S. 6-in. sheet (Herts. 9 NE.) it is marked as The Warren, but not as an antiquity; nor is it included among the 139 homestead moats recorded for the county by the Royal Commission.Scales Park comprises something over 400 acres of well-grown woodland on the plateau which forms the watershed of the rivers Stort and Quin, both flowing south to join eventually the Thames. Its height above sea-level is 450 ft. on the northwest, declining gently to 400 ft. on the east and south. Geologically the area consists of chalky clay over the chalk.The moat of the Warren, enclosing an approximately square island about a quarter of an acre in size, varied in width from 10 to 25 ft. and at the time of excavation was filled with black boggy silt. Round its outer edge ran a low much-spread bank, 20 to 30 ft. wide but not more than 2 ft. high. The enclosure presented a puzzling combination of mounds and hollows. A large mound, 9 ft. 6 in. high, on a raised platform occupied the north-eastern half. The south-western half had centrally a similar platform, 5 ft. above the surface of the moat, with flanking mounds, 6 and 7 ft. high, at the corners (pl. xxiv b). The cavities between the mounds were practically level with the moat; slight ridges barred the western hollow and the south end of the eastern hollow.

scholarly journals Use of shell-shape to discriminate betweenBrachidontes rodrigueziiandBrachidontes purpuratusspecies (Mytilidae) in the transition zone of their distributions (south-western Atlantic)

2012 ◽  
Vol 93 (3) ◽  
pp. 803-808 ◽  
Author(s):  
Silvina Van der Molen ◽  
Federico Márquez ◽  
Yanina L Idaszkin ◽  
Mariana Adami
Keyword(s):  
Transition Zone ◽  
Rocky Shore ◽  
Shell Morphology ◽  
Shell Shape ◽  
The South ◽  
Western Atlantic ◽  
The North ◽  
The Pacific ◽  
Distribution Ranges ◽  
The World

Mussels are important components of rocky shore assemblages throughout the world. Several mytilid species are found as multilayered beds in the intertidal along the coasts of the south-western Atlantic. However, in contrast to the north communities in the Pacific and Atlantic, those of the south-western Atlantic are dominated by species of small size, locally named mejillines. These mid-intertidal beds attached to consolidated substrates are dominated by virtual monocultures of two small-sized species ofBrachidontes: B. rodriguezii(d'Orbigny, 1842) andB. (Perumytilus) purpuratusLamarck, 1819, respectively distributed in the warm and cold temperate sectors of the south-western Atlantic; both coexisting in the transition zone between 40° and 44°S latitude. Nevertheless, there has been some confusion about the separation ofB. rodrigueziiandB. purpuratus, as well as about the boundaries of their distribution ranges in the south-western Atlantic. Here, on the basis of a morphogeometric analysis of shell morphology, we describe a feasible way for the identification of both species.

scholarly journals XXXIX. The lignites and clays of Bovey Tracey, Devonshire

1862 ◽  
Vol 152 ◽  
pp. 1019-1038 ◽  
Keyword(s):  
Far East ◽  
Left Bank ◽  
The South ◽  
North East ◽  
The North ◽  
South West ◽  
North Eastern ◽  
The Village ◽  
Western Portion ◽  
North Western

The little town or village of Bovey Tracey, in Devonshire, nestles at the foot of Dartmoor, very near its north-eastern extremity; it is situated on the left bank of the river Bovey, about two miles and a half above the point at which it falls into the Teign, and is about eleven miles from each of the towns Exeter, Torquay, and Totnes*,—bearing south-westerly from the first, north-westerly from the second, and northerly from the last. A considerable plain stretches away from it in a south-easterly direction, having a length of six miles from a point about a mile west of Bovey to another nearly as far east of Newton; its greatest breadth, from Chudleigh Bridge on the north-east to Blackpool on the south-west, is four miles. It forms a lake-like expansion of the valleys of the Teign and Bovey rivers, especially the latter, whose course it may be said to follow in the higher part, where it is most fully developed; whilst the Teign constitutes its axis below the junction of the two streams. Its upper, or north-western portion, immediately adjacent to the village, is known as “Bovey Heathfield,” and measures about 700 acres.

Five new species of Arcidae from Brazil with description of new genus: Paranadara (Mollusca: Bivalvia)

2011 ◽  
Vol 92 (5) ◽  
pp. 1139-1150 ◽  
Author(s):  
Jonata de A. Francisco ◽  
José Carlos N. de Barros ◽  
Silvio Felipe B. de Lima
Keyword(s):  
New Record ◽  
New Genus ◽  
Shell Morphology ◽  
Brazilian Coast ◽  
Southern Brazil ◽  
Rio Grande Do Sul ◽  
Western Atlantic ◽  
Eastern Brazil ◽  
North Eastern ◽  
Dorsal Area

New arcid species belonging to the genera Paranadara gen. nov., Acar and Asperarca (new record) are described for the western Atlantic Ocean based on shell morphology. Paranadara taludae sp. nov., Acar naturezae sp nov., Acar oliveirae sp. nov. and Asperarca tarcylae sp. nov. were collected off north-eastern Brazil between depths of 70 and 690 m, whereas Acar lepidoformis sp. nov. was dredged off the State of Rio Grande do Sul (southern Brazil) at a depth of 141 m. There are no species along the Brazilian coast that are morphologically similar to Paranadara taludae sp. nov. Acar naturezae sp. nov., Acar lepidoformis and Acar Acar oliveirae sp. nov. are similar to this genus due to shape, ligament, presence of concentric lamellae cut by radial threads, a broad dorsal area and a markedly narrowed anterior region in comparison to the posterior region, which is strongly expanded. Asperarca tarcylae sp. nov. is similar to this genus due to the presence of a small edentulous region below the umbo and smooth inner margin.

scholarly journals Nutrient regimes control phytoplankton ecophysiology in the South Atlantic

2013 ◽  
Vol 10 (7) ◽  
pp. 11969-12008
Author(s):  
T. J. Browning ◽  
H. A. Bouman ◽  
C. M. Moore ◽  
C. Schlosser ◽  
G. A. Tarran ◽  
...  
Keyword(s):  
Photochemical Efficiency ◽  
South Atlantic ◽  
The South ◽  
Western Atlantic ◽  
Southern Boundary ◽  
The North ◽  
Circumpolar Current ◽  
Control Patterns ◽  
Chlorophyll Concentrations ◽  
Fe Addition

Abstract. Fast Repetition Rate fluorometry (FRRf) measurements of phytoplankton photophysiology from an across-basin South Atlantic cruise (as part of the GEOTRACES programme) characterized two dominant ecophysiological regimes which were interpreted on the basis of nutrient limitation. South of the South Subtropical Convergence (SSTC) in the northern sub-Antarctic sector of the Antarctic Circumpolar Current (ACC) in the Eastern Atlantic Basin, waters are characterized by elevated chlorophyll concentrations, a dominance by larger phytoplankton cells, and low apparent photochemical efficiency (Fv / Fm). Shipboard 24 h iron (Fe) addition incubation experiments confirmed that Fe stress was primarily responsible for the low Fv / Fm, with Fe addition to these waters, either within the artificial bottle additions or naturally occurring downstream enrichment from Gough Island, significantly increasing Fv / Fm values. Satellite images suggest a broader region of enhanced chlorophyll concentrations around the SSTC in the Western Atlantic relative to the Eastern Atlantic: hypothesized to be a result of higher iron supply from the South American continent. To the north of the SSTC at the southern boundary of the South Atlantic Gyre, phytoplankton are characterized by high values of Fv / Fm which, coupled with the low macronutrient concentrations and increased presence of picocyanobacteria, are interpreted as conditions of Fe replete, balanced macronutrient-limited growth. Spatial correlation was found between Fv / Fm and Fe:nitrate ratios, supporting the suggestion that the relative supply ratios of these two nutrients can control patterns of limitation and consequently the ecophysiology of phytoplankton in subtropical gyre and ACC regimes.

Encrusting Sabellariidae (Annelida: Polychaeta) in rhodolith beds, with description of a new species of Sabellaria from the Brazilian coast

2010 ◽  
Vol 91 (2) ◽  
pp. 425-438 ◽  
Author(s):  
André Souza Dos Santos ◽  
Pablo Riul ◽  
Ana Claudia Dos Santos Brasil ◽  
Martin Lindsey Christoffersen
Keyword(s):  
New Species ◽  
Brazilian Coast ◽  
Subtidal Zone ◽  
Coralline Red Algae ◽  
Western Atlantic ◽  
North East ◽  
The North ◽  
Eastern Brazil ◽  
First Occurrence ◽  
A New Species

Rhodoliths or maërl are calcareous nodules of coralline red algae growing unattached to the substrata. They sustain a high biodiversity, being one of the most important marine benthic environments dominated by macrophytes. Sabellariidae are tube-dwelling filter feeding marine polychaetes that build their tubes by secreting cement from their thoracic glands. Some species are solitary, while others build tubes together, forming large aggregates. This study analyses Sabellariidae collected in rhodolith beds along the subtidal zone of the coast of João Pessoa and Cabedelo, Paraíba, north-eastern Brazil. A total of 100 individuals of six species were identified. Four are reported for the first time for the north-east coast of Brazil: Phragmatopoma caudata Mörch (1863), Sabellaria bella Grube (1870), Sabellaria nanella Chamberlin (1919), and Sabellaria wilsoni Lana & Gruet (1989). The first occurrence of Sabellaria pectinata Fauvel (1923) along the western Atlantic is provided as well as the description of a new species of the genus Sabellaria.

scholarly journals PATTERNS OF CACTACEAE SPECIES DISTRIBUTION IN A PROTECTED AREA IN THE SEMIARID CAATINGA BIOME OF NORTH-EASTERN BRAZIL

2016 ◽  
Vol 73 (2) ◽  
pp. 157-170 ◽  
Author(s):  
S. Ribeiro-Silva ◽  
M. B. Medeiros ◽  
V. V. F. Lima ◽  
M. R. Peixoto ◽  
L. Y. S. Aona
Keyword(s):  
Protected Area ◽  
Distribution Patterns ◽  
Semiarid Region ◽  
Floristic Survey ◽  
North East ◽  
The North ◽  
Eastern Brazil ◽  
North Eastern ◽  
Floristic Data ◽  
Floristic Variation

Although Brazil is the centre with the third highest diversity of Cactaceae, the distribution of species at the local scale in Brazil remains largely unknown. This article describes the distribution patterns of the Cactaceae communities in the protected area of the Contendas do Sincorá National Forest (CSNF) in a semiarid region in the north-east of Brazil. Trails were distributed between the altitudes of 290 and 596 m, along which 91 plots (1.8 ha) were established for quantitative surveys. The floristic data were also recorded separately on these trails. With the floristic survey, 18 taxa were recorded, and the quantitative surveys within the plots identified 10 species, represented by 1135 individuals. The distribution patterns of the species of Cactaceae were intermittent, which provided a likely explanation for the differences between the floristic survey and the species composition of the plots. The largest fraction of the floristic variation was not explained by environment or space, and this may be related to climatic alterations in the past, evolutionary processes, natural and anthropic disturbances and other unmeasured environmental variables. The recorded endemic, vulnerable and endangered species of the caatingas of Bahia indicate that broader protection areas for the Cactaceae species in the region of the CSNF are necessary.

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