scholarly journals Hydrophytic Cyperaceae from the Araguaia river basin, Brazil

Rodriguésia ◽  
2011 ◽  
Vol 62 (4) ◽  
pp. 847-866 ◽  
Author(s):  
Adriana Luiza Ribeiro de Oliveira ◽  
André dos Santos Bragança Gil ◽  
Claudia Petean Bove
Keyword(s):  
River Basin ◽  
Geographic Distribution ◽  
Brazilian Cerrado ◽  
Identification Keys ◽  
Araguaia River ◽  
Cerrado Savanna

Abstract Cyperaceae is a cosmopolitan family with over 5,000 species, which are often found in wet habitats. In this study we found 31 hydrophylic species of Cyperaceae, belonging to 10 genera (Ascolepis, Calyptrocarya, Cyperus, Eleocharis, Fimbristylis, Fuirena, Lipocarpha, Pycreus, Rhynchospora and Scleria), that occur in the Araguaia River Basin, located mainly within the Brazilian Cerrado (savanna). Short descriptions, geographic distribution, illustrations, identification keys and comments are presented.

Long known, brand new, and possibly threatened: a new species of watersnake of the genus Helicops Wagler, 1828 (Serpentes; Xenodontinae) from the Tocantins-Araguaia River Basin, Brazil

Zootaxa ◽  
2021 ◽  
Vol 4903 (2) ◽  
pp. 217-241
Author(s):  
ANTONIO MORAES-DA-SILVA ◽  
RENATA CECÍLIA AMARO ◽  
PEDRO M. SALES NUNES ◽  
MIGUEL TREFAUT RODRIGUES ◽  
FELIPE FRANCO CURCIO
Keyword(s):  
New Species ◽  
River Basin ◽  
Sister Group ◽  
Color Pattern ◽  
Rapid Expansion ◽  
Brazilian Cerrado ◽  
Superficial Resemblance ◽  
Araguaia River ◽  
Molecular Phylogenetic ◽  
A New Species

We describe a new species of watersnake of the genus Helicops from the Tocantins-Araguaia River Basin based on characters of coloration and hemipenial morphology, also corroborated by a molecular phylogenetic analysis including 18 terminals of 10 additional congeners. The new species superficially resembles the spotted-patterned He. leopardinus, but differs from it in exhibiting dorsal spots fused into irregular bands, and a unique hemipenial structure with two pairs of distinctly enlarged basal spines. In addition, despite the superficial resemblance of color pattern, our genetic evidence indicates that the new species does not belong to the He. leopardinus radiation, representing the sister group of a component including terminals of this species, He. modestus, and He. infrataeniatus. Finally, we discuss the apparent restriction of the new species to the Tocantins-Araguaia Basin with focus on vicariant processes that may have promoted its differentiation, as well as on the conservation challenges in an area severely affected by anthropic impacts associated with the rapid expansion of hydroelectric and agricultural sectors in the Brazilian Cerrado. 

scholarly journals Habitat differences affect the nuclear morphology of the erythrocytes and the hepatic melanin in Leptodactylus fuscus (Anura) in the Brazilian Cerrado savanna

2021 ◽  
Author(s):  
Rhayane Alves Assis ◽  
Wadson Rodrigues Rezende ◽  
Cirley Gomes Araújo dos Santos ◽  
Marcelino Benvindo-Souza ◽  
Nathan Pereira Lima Amorim ◽  
...  
Keyword(s):  
Nuclear Morphology ◽  
Brazilian Cerrado ◽  
Habitat Differences ◽  
Cerrado Savanna

scholarly journals Microglanis cottoides (Boulenger, 1891) (Siluriformes: Pseudopimelodidae): distribution extension to Salí-Dulce River basin, northwestern Argentina

Check List ◽  
2013 ◽  
Vol 9 (2) ◽  
pp. 443
Author(s):  
Luis Fernández ◽  
Gladys Gonzo
Keyword(s):  
River Basin ◽  
Geographic Distribution ◽  
Drainage System ◽  
River System ◽  
Northwestern Argentina

Microglanis cottoides (Boulenger 1891) is a known Paraná-Plata River basin catfish. Its geographic distribution is herein extended to a new drainage system, the Salí-Dulce River system, northwestern Argentina, which is a separate drainage from the Paraná-Plata basin.

scholarly journals Drivers of fire occurrence in a mountainous Brazilian cerrado savanna: Tracking long-term fire regimes using remote sensing

2017 ◽  
Vol 78 ◽  
pp. 270-281 ◽  
Author(s):  
Swanni T. Alvarado ◽  
Tamires Fornazari ◽  
Andresa Cóstola ◽  
Leonor Patricia Cerdeira Morellato ◽  
Thiago Sanna Freire Silva
Keyword(s):  
Remote Sensing ◽  
Fire Regimes ◽  
Fire Occurrence ◽  
Brazilian Cerrado ◽  
Cerrado Savanna

scholarly journals LOS CAMARONES DE LA FAMILIA CRANGONIDAE DE LA FRANJA SUPERIOR DEL TALUD CONTINENTAL DEL MAR CARIBE COLOMBIANO

2016 ◽  
Vol 31 ◽  
Author(s):  
Norella Cruz ◽  
Adriana Bermúdez ◽  
Néstor Hernando Campos ◽  
Gabriel Navas
Keyword(s):  
Continental Slope ◽  
Geographic Distribution ◽  
Caribbean Sea ◽  
Marine Fauna ◽  
Diagnostic Characters ◽  
Morphological Variations ◽  
Identification Keys ◽  
First Time

Four surveys were conducted between October 1998 and April 1999 along the upper section of the Colombian Caribbean Sea continental slope with the aim of compliting marine fauna inventories. During the surveys (INVEMAR-MACROFAUNA 1) individuals of the shrimps Parapontocaris caribbaea, P. vicina, Prionocrangon pectinata and Parapontophilus gracilis (Decapoda: Crangonidae) were found and are herein registered for the first time in Colombian waters. Along with the description of the collected material and reference to site of collection, identification keys, diagnostic characters, diagrams and bathimetric and geographic distribution are included as well as comments on morphological variations of the individuals.

An Intriguing New Species of Sanchezia (Acanthaceae) from Southeastern Peru

2021 ◽  
Vol 46 (4) ◽  
pp. 1080-1085
Author(s):  
Igor H. F. Azevedo ◽  
Pedro L. R. Moraes
Keyword(s):  
New Species ◽  
Endangered Species ◽  
Phylogenetic Relationship ◽  
River Basin ◽  
Geographic Distribution ◽  
Close Similarity ◽  
Remarkable Feature ◽  
Southern Peru ◽  
Madre De Dios ◽  
A New Species

Abstract— Sanchezia dubia is described and illustrated as a new species from the department of Madre de Dios in southeastern Peru. Its morphology slightly resembles Sanchezia sprucei, but its most remarkable feature is its close similarity to Suessenguthia, even more so than to those of its own genus. This new species is distinguished from others by its glabrous stem and leaves, its inflorescence containing two to five serial cymose heads, which are sessile to short-pedunculate, with mostly two to four flowers each (occasionally one), its inner bracts ranging in length between 6 and 23 mm, and its androecium composed of two stamens and two mucronate staminodes. We suggest it is an endangered species based on its restricted geographic distribution, its few known populations, and the increasing threats to its habitats. Along with Suessenguthia koessleri, this new species seems to be a key taxon to understanding the phylogenetic relationship between these two genera, which is still uncertain. Additionally, we provide a key to identify the Sanchezia and Suessenguthia species of the Madre de Dios River basin from southern Peru to northern Bolivia.

scholarly journals The Tocantins-Araguaia Basin as a migratory route and a wintering area of Falco peregrinus (Aves, Falconidae)

2019 ◽  
Vol 27 (4) ◽  
pp. 284-290
Author(s):  
Túlio Dornas ◽  
Willian Menq ◽  
Tiago Junqueira ◽  
Estevão F. Santos
Keyword(s):  
South America ◽  
River Basin ◽  
The State ◽  
Migration Route ◽  
Falco Peregrinus ◽  
Central Brazil ◽  
Araguaia River ◽  
Wintering Area ◽  
Migratory Route

AbstractThe Peregrine Falco peregrinus, is an Nearctic migrant to Brazil where its status in central Brazil is still poorly known. Herein we present a compilation of records of the species from the state of Tocantins and comment on its use of a wintering site in the state of Goiás. These records show that the Tocantins-Araguaia River Basin is a migration route for the species, and therefore a mid-continental migration route through the interior of South America.

New species and records of Arrenurus from the Paraná river, Argentina (Acari: Parasitengona: Arrenuridae)

Zootaxa ◽  
2006 ◽  
Vol 1208 (1) ◽  
pp. 25
Author(s):  
ROSSO De FERRADÁS BEATRIZ
Keyword(s):  
New Species ◽  
River Basin ◽  
Geographic Distribution ◽  
Paraná River ◽  
Morphometric Characteristics ◽  
Parana River ◽  
Brazilian Species ◽  
First Time ◽  
Paraná River Basin

Arrenuridae inhabiting the Paraná river basin show great diversity relative to that of this family in Argentina and other Neotropical regions, with 38 species (35 studied by the author). In this new contribution Arrenurus mocovi n.sp. is described and A. (Arrenurus) trichophorus Daday is recorded for the first time. The female of this latter species is redescribed and data for the males are added, as well as the geographic distribution of the species. For Arrenurus imperator imperator Lundblad, a Brazilian species, morphometric characteristics are given. The recently created subgenus A. (Brevicaudaturus) is analyzed, within which the last species plus three other neotropical taxa are placed.

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