scholarly journals First records in Brazil for Arthrosaura versteegii van Lidth de Jeude, 1904 (Reptilia, Gymnophthalmidae), a possible species complex, and distribution extension for Arthrosaura montigena Myers & Donnelly, 2008, in Venezuela

Check List ◽  
2018 ◽  
Vol 14 (4) ◽  
pp. 569-577 ◽  
Author(s):  
Teresa C. Avila-Pires ◽  
Marinus S. Hoogmoed ◽  
Marcelia B. Silva
Keyword(s):  
Sea Level ◽  
Species Complex ◽  
French Guiana ◽  
Amazon River ◽  
Guiana Shield ◽  
Brazilian Amazonia ◽  
Amazonian Lowlands

Arthrosaura versteegii van Lidth de Jeude 1904 has a supposed distribution on the Guiana Shield from eastern Venezuela to western French Guiana, between 100–1400 m above sea level. No records for Brazil were known. We here report material from two areas in Brazilian Amazonia south of the Amazon River, of specimens morphologically agreeing with mso-bidi-font-style: normalA. versteegii, but with two distinct types of hemipenes that also differ from that of Guianan males. Moreover, reexamination of two specimens of mso-bidi-font-style:normalA. versteegii reported from the Venezuela highlands show that they are A. montigena Myers and Donnelly 2008. This leaves A. versteegii restricted to eastern Amazonian lowlands.

scholarly journals Human Q Fever on the Guiana Shield and Brazil: Recent Findings and Remaining Questions

2021 ◽  
Author(s):  
Loïc Epelboin ◽  
Carole Eldin ◽  
Pauline Thill ◽  
Vincent Pommier de Santi ◽  
Philippe Abboud ◽  
...  
Keyword(s):  
South America ◽  
Geographical Distribution ◽  
Coxiella Burnetii ◽  
French Guiana ◽  
Q Fever ◽  
Guiana Shield ◽  
Animal Reservoir ◽  
The World ◽  
Unique Strain ◽  
Amazonian Region

Abstract Purpose of Review In this review, we report on the state of knowledge about human Q fever in Brazil and on the Guiana Shield, an Amazonian region located in northeastern South America. There is a contrast between French Guiana, where the incidence of this disease is the highest in the world, and other countries where this disease is practically non-existent. Recent Findings Recent findings are essentially in French Guiana where a unique strain MST17 has been identified; it is probably more virulent than those usually found with a particularly marked pulmonary tropism, a mysterious animal reservoir, a geographical distribution that raises questions. Summary Q fever is a bacterial zoonosis due to Coxiella burnetii that has been reported worldwide. On the Guiana Shield, a region mostly covered by Amazonian forest, which encompasses the Venezuelan State of Bolivar, Guyana, Suriname, French Guiana, and the Brazilian State of Amapá, the situation is very heterogeneous. While French Guiana is the region reporting the highest incidence of this disease in the world, with a single infecting clone (MST 117) and a unique epidemiological cycle, it has hardly ever been reported in other countries in the region. This absence of cases raises many questions and is probably due to massive under-diagnosis. Studies should estimate comprehensively the true burden of this disease in the region.

New species and records of Chasmogenus Sharp, 1882 from the southwestern margin of the Guiana Shield (Coleoptera: Hydrophilidae: Acidocerinae)

Zootaxa ◽  
2021 ◽  
Vol 5048 (3) ◽  
pp. 435-443
Author(s):  
RACHEL D. GLYNN ◽  
ANDREW EDWARD Z. SHORT
Keyword(s):  
New Species ◽  
Male Genitalia ◽  
French Guiana ◽  
Molecular Data ◽  
Integrative Approach ◽  
Guiana Shield ◽  
Adult Morphology ◽  
Northern Brazil ◽  
Southwestern Margin ◽  
Three New Species

The Neotropical water scavenger beetle genus Chasmogenus Sharp, 1882 is a diverse lineage with 34 described species. Here, three new species from the southwestern margin of the Guiana Shield are described using an integrative approach combining adult morphology and molecular data: Chasmogenus clinatus sp. n. (Brazil: Amazonas, Venezuela: Amazonas), C. gironae sp. n. (Venezuela: Amazonas), and C. inpa sp. n. (Brazil: Amazonas). Examination of the male genitalia is essential for confident identifications and thus unassociated females may prove extremely difficult to identify. New distributional records in Brazil for C. acuminatus Smith & Short, 2020 are provided as well as habitus images of newly described species and an updated key to the species from Venezuela, Suriname, Guyana, French Guiana and northern Brazil.  

scholarly journals A CONTRIBUTION TO THE HYDROCHEMISTRY AND WATER TYPOLOGY OF THE AMAZON RIVER AND ITS TRIBUTARIES

2019 ◽  
Vol 20 (72) ◽  
pp. 360-374 ◽  
Author(s):  
Maria do Socorro Rocha da Silva ◽  
Eduardo Antonio Ríos-Villamizar ◽  
Hillândia Brandão da Cunha ◽  
Sebastião Átila Fonseca Miranda ◽  
Sávio José Filgueiras Ferreira ◽  
...  
Keyword(s):  
Electrical Conductivity ◽  
Physicochemical Properties ◽  
Amazon Basin ◽  
The Other ◽  
Amazon River ◽  
Left Bank ◽  
Guiana Shield ◽  
Ionic Charge ◽  
Physical Chemical ◽  
Geological Diversity

The geological diversity of the Amazon Basin, as well as the pluvial regime, influences the characteristics of the waters. To know the water types of the rivers of the Amazon basin, 288 superficial water samples were collected, 94 of them along the Amazon River and 194 in their tributaries, from March 2009 to September 2012. The physical, chemical, and physicochemical properties were analyzed. Rivers with pH between 6.5 and 7.6 and electrical conductivity (40.00 - 80.00 μS cm-1) are water bodies that are influenced by the Andean region (e.g., the Amazon River and some of its right bank tributaries). On the other hand, the rivers with pH in the range of 3.5 to 5.5 and conductivity <30.00 μS cm-1, which are Amazon River’s left bank tributaries, reflect the characteristics of the Guiana Shield. The rivers with pH (6.0 to 7.0), low ionic charge, and conductivity <40.0 μS cm-1, such as the lower Amazon River’s right bank tributaries (Tapajos and Xingu) which are influenced by the Central Brazilian Shield, and also the middle/upper Amazon River’s right bank tributaries (Tefé, Coari and Jutaí).

Lectotypification of two Stegolepis names (Rapateaceae)

Phytotaxa ◽  
2018 ◽  
Vol 347 (1) ◽  
pp. 96
Author(s):  
RODRIGO SCHÜTZ RODRIGUES
Keyword(s):  
South America ◽  
Guiana Shield ◽  
Brazilian Amazonia ◽  
Northern South America ◽  
Floristic Studies

Stegolepis Klotzsch ex Körnicke (1872: 480) is the largest genus of Rapateaceae and comprises 33 species endemic to the Guiana Shield in northern South America (Berry 2004). Most Stegolepis names have no problems concerning their typification. However, as part of ongoing floristic studies on the Rapateaceae of the Brazilian Amazonia and adjacent Guiana Shield areas (Rodrigues & Flores 2010, 2017; Rodrigues 2017), I found that two early names of Stegolepis are in need of lectotypification.

Systematic review of Atractus schach (Serpentes: Dipsadidae) species complex from the Guiana Shield with description of three new species

2019 ◽  
Vol 17 (3) ◽  
pp. 207-229 ◽  
Author(s):  
Paulo Roberto Melo-Sampaio ◽  
Paulo Passos ◽  
Antoine Fouquet ◽  
Ana Lucia Da Costa Prudente ◽  
Omar Torres-Carvajal
Keyword(s):  
Systematic Review ◽  
New Species ◽  
Species Complex ◽  
Guiana Shield ◽  
Three New Species

Review of some species groups of the genus Oospila Warren, with descriptions of nine new species (Lepidoptera: Geometridae: Geometrinae)

Zootaxa ◽  
2018 ◽  
Vol 4497 (2) ◽  
pp. 151 ◽  
Author(s):  
AARE LINDT ◽  
AXEL HAUSMANN ◽  
JAAN VIIDALEPP
Keyword(s):  
New Species ◽  
Costa Rica ◽  
Species Complex ◽  
French Guiana ◽  
Species Group ◽  
New Subspecies ◽  
Wing Patterns ◽  
Species Groups ◽  
Males And Females

The Neotropical geometrine genus Oospila Warren, 1897 includes seventy-nine species and was revised by Cook & Scoble (1995). The genus is distinctive in having a row of raised abdominal crests, which are composed of specialized, erect, metallic shining scales. This paper focuses on the integrative morphological and molecular delimitation of the smallest Oospila species. The wing patterns and genitalia structures of males and females are illustrated. Cook & Scoble (1995) distinguished 13 species groups within Oospila. We discuss the species of the Oospila flavilimes species group, the O. stigma species group and O. miccularia species group below, and separate the O. arpata species complex into a group of its own. Nine new species and two new subspecies are described in this paper: O. cristae sp. n. from Ecuador, O. falcata sp. n. from French Guiana, O. pallidaria boliviensis subsp. n. from Bolivia, and O. loreenae sp. n. from Bolivia (flavilimes species group), O. ehakernae sp. n. from Costa Rica, O. similiplaga bolarpata subsp. n. from Bolivia (arpata species group), O. brehmi sp. n. and O. bifida sp. n. both from Bolivia, O. moseri sp. n. from Brazil, O. absaloni sp. n. and O. pipa sp. n. both from Ecuador (miccularia species group). Oospila similiplaga (Warren) (stat. nov.) is raised here from synonymy with O. arpata (Schaus) and O. imula (Dognin) from synonymy with O. miccularia (Guenée), respectively. Oospila agnetaforslundae nom. nov. is proposed as a replacement name for Oospila marginata Schaus, 1912 (nec Oospila marginata Warren, 1897), raising it to species rank from synonymy of Oospila permagna (Warren, 1909). With this paper, the number of Neotropical Oospila species is raised to 88. 

scholarly journals Yellow fever cases in French Guiana, evidence of an active circulation in the Guiana Shield, 2017 and 2018

2018 ◽  
Vol 23 (36) ◽  
Author(s):  
Alice Sanna ◽  
Audrey Andrieu ◽  
Luisiane Carvalho ◽  
Claire Mayence ◽  
Philippe Tabard ◽  
...  
Keyword(s):  
Yellow Fever ◽  
Vaccination Coverage ◽  
French Guiana ◽  
Guiana Shield

French Guiana (FG) is a French overseas region bordering Brazil and Suriname that is considered endemic for yellow fever (YF); vaccination is compulsory for residents and travellers. In August 2017 and 2018, two sporadic YF cases were notified 1 year apart, confirming that sylvatic YF virus circulation is active in the region. YF vaccination coverage should be closely monitored and improved in FG and neighbouring territories and clinicians should be aware of the risk.

scholarly journals Suspended sediment and dissolved load budgets of two Amazonian rivers from the Guiana Shield: Maroni River at Langa Tabiki and Oyapock River at Saut Maripa (French Guiana)

2010 ◽  
Vol 24 (11) ◽  
pp. 1433-1445 ◽  
Author(s):  
Francis Sondag ◽  
Jean Loup Guyot ◽  
Jean Sébastien Moquet ◽  
Alain Laraque ◽  
Georges Adele ◽  
...  
Keyword(s):  
Suspended Sediment ◽  
French Guiana ◽  
Guiana Shield ◽  
Dissolved Load

scholarly journals Integrative taxonomy reveals a new but common Neotropical treefrog, hidden under the name Boana xerophylla

Zootaxa ◽  
2021 ◽  
Vol 4981 (3) ◽  
pp. 401-448
Author(s):  
MOISÉS ESCALONA ◽  
ENRIQUE LA MARCA ◽  
MICHELLE CASTELLANOS ◽  
ANTOINE FOUQUET ◽  
ANDREW J. CRAWFORD ◽  
...  
Keyword(s):  
New Species ◽  
Trinidad And Tobago ◽  
French Guiana ◽  
Integrative Taxonomy ◽  
Sensu Stricto ◽  
Distribution Area ◽  
Advertisement Call ◽  
Guiana Shield ◽  
Species Discovery ◽  
Orinoco River

Boana xerophylla is a common treefrog widely distributed in northern Brazil, Colombia, French Guiana, Guyana, Panama, Suriname, Trinidad and Tobago, and Venezuela. A recent study found molecular, acoustic, and morphometric differences between the populations located on opposite sides of the Orinoco River. Here, we carry out an updated molecular phylogenetic analysis, including new samples from all the countries along the distribution area, and analyzed additional call recordings from Brazil, Colombia, French Guiana, Panama, Trinidad and Tobago, and Venezuela. Our phylogenetic inference reveals three geographically restricted lineages: one in the eastern Guiana Shield (corresponding to B. xerophylla sensu stricto), another in the western Guiana Shield, and a third one north of the Orinoco River. Morphological and acoustic data agree with the differentiation between the populations north of the Orinoco River and the eastern Guiana Shield despite the low genetic p-distances observed (16S rRNA: 0.7–2.2 %). We argue that the populations north of the Orinoco River correspond to a new species, sister of B. xerophylla. We name and describe Boana platanera sp. nov. from the southern versant of the Cordillera de Mérida (08º48’26’’ N, 70º30’46’’ W, WGS 84; 947 m asl), Venezuela, and refer all the populations north of the Orinoco River currently identified as B. xerophylla to this species. The new species can be readily diagnosed from B. xerophylla (characters of the latter in parentheses) by a pale orange-yellow or light brown dorsal coloration (dark brown to green), palpebral membrane with dark pigments (pigments absent); pericloacal region dark brown (cream), advertisement call with shorter first note length than B. xerophylla. This study represents an empirical example regarding false negatives behind genetic thresholds for species discovery, appraising the use of integrative taxonomic approaches. 

scholarly journals WHERE THE AMAZON RIVER MEETS THE ORINOCO RIVER. ARCHAEOLOGY OF THE GUIANAS

2012 ◽  
Vol 4 (1) ◽  
pp. 10 ◽  
Author(s):  
Stéphen Rostain
Keyword(s):  
French Guiana ◽  
Eastern Coast ◽  
Amazon River ◽  
Western Coast ◽  
Last Millennium ◽  
Cultural Traditions ◽  
Orinoco River ◽  
The Guianas ◽  
Cultural Entities

Archaeological and interdisciplinary investigations conducted in the Guianas during these last 35 years offer a new picture of the pre-Co­lumbian Guianas. Although archaeology still is relatively incipient in the Guianas, it is possible to draw up a panorama of the prehistory of this huge region. During the last millennium before the European Conquest, Guianas coast was divided into two main territories dominated by two different cultural entities. Cayenne Island in French Guiana was the key-area marking the boundary between two cultural traditions. Western coast up to the Guyana was dominated by cultures linked to the Arauquinoid Tradition originated in the Middle Orinoco. Eastern coast was occupied by cultures belonging to the Polychrome Tradition of the Lower Ama­zon. These two cultural entities grew up from ca. AD 600 up to their destruction by the European Conquest. Keywords: Archaeology, Guianas, arauquinoid tradition, polychrome tradition

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