Morphological description of the final instar larvae of Argia reclusa Selys, 1865 and Tigriagrion aurantinigrum Calvert, 1909 from Southeastern Brazil (Odonata: Coenagrionidae)

Zootaxa ◽  
2021 ◽  
Vol 5060 (3) ◽  
pp. 392-400
Author(s):  
DIOGO SILVA VILELA ◽  
HENRIQUE VENÂNCIO ◽  
JEAN CARLOS SANTOS
Keyword(s):  
Single Species ◽  
Southeastern Brazil ◽  
Morphological Description ◽  
Labial Palp ◽  
Small Stream ◽  
Cerrado Biome ◽  
Number Of Teeth

The final instar larvae of Argia reclusa Selys, 1865 and Tigriagrion aurantinigrum Calvert, 1909 are described, diagnosed and illustrated. The larvae of A. reclusa has a very prominent premental ligula, shared with a single species in Brazil, from which it can be separated by a combination of characters. The larvae of T. aurantinigrum is similar to most Oxyagrion in regard to prementum and lamellae shape, and differs from those taxa in palpal and premental setation and number of teeth on the labial palp. Both larvae were collected in a small stream of the Cerrado biome, where both species are common.  

scholarly journals Hydrological simulation in a tropical humid basin in the Cerrado biome using the SWAT model

2018 ◽  
Vol 49 (3) ◽  
pp. 908-923 ◽  
Author(s):  
Richarde Marques da Silva ◽  
José Carlos Dantas ◽  
Joyce de Araújo Beltrão ◽  
Celso A. G. Santos
Keyword(s):  
Assessment Tool ◽  
Swat Model ◽  
Coefficient Of Determination ◽  
Southeastern Brazil ◽  
Measured Variable ◽  
Hydrological Simulation ◽  
Cerrado Biome ◽  
Monthly Streamflow ◽  
P Factor ◽  
Water Assessment

Abstract A Soil and Water Assessment Tool (SWAT) model was used to model streamflow in a tropical humid basin in the Cerrado biome, southeastern Brazil. This study was undertaken in the Upper São Francisco River basin, because this basin requires effective management of water resources in drought and high-flow periods. The SWAT model was calibrated for the period of 1978–1998 and validated for 1999–2007. To assess the model calibration and uncertainty, four indices were used: (a) coefficient of determination (R2); (b) Nash–Sutcliffe efficiency (NS); (c) p-factor, the percentage of data bracketed by the 95% prediction uncertainty (95PPU); and (d) r-factor, the ratio of average thickness of the 95PPU band to the standard deviation of the corresponding measured variable. In this paper, average monthly streamflow from three gauges (Porto das Andorinhas, Pari and Ponte da Taquara) were used. The results indicated that the R2 values were 0.73, 0.80 and 0.76 and that the NS values were 0.68, 0.79 and 0.73, respectively, during the calibration. The validation also indicated an acceptable performance with R2 = 0.80, 0.76, 0.60 and NS = 0.61, 0.64 and 0.58, respectively. This study demonstrates that the SWAT model provides a satisfactory tool to assess basin streamflow and management in Brazil.

A new species of Hyalella (Crustacea: Amphipoda: Hyalellidae) from Itatiaia National Park, Brazil: an epigean freshwater amphipod with troglobiotic traits at 2,200 meters of altitude

Zootaxa ◽  
2017 ◽  
Vol 4344 (1) ◽  
pp. 147 ◽  
Author(s):  
STELLA GOMES RODRIGUES ◽  
ANDRÉ R. SENNA ◽  
ADRIANA QUADRA ◽  
ALESSANDRA ANGÉLICA DE PÁDUA BUENO
Keyword(s):  
New Species ◽  
Protected Areas ◽  
Rio De Janeiro ◽  
National Park ◽  
Morphological Characteristics ◽  
Minas Gerais ◽  
Southeastern Brazil ◽  
Small Stream ◽  
Brazilian Species ◽  
A New Species

A new species of the freshwater amphipod Hyalella Smith, 1874 is described for the plateau of the Itatiaia National Park, located between the states of Minas Gerais and Rio de Janeiro, southeastern Brazil. This is the first Brazilian species of Hyalella found at more than 2,200 meters of altitude. The specimens were found in a small stream, buried under rocks, in the higher area of the Park. The main morphological characteristics that differentiate the new species are the extreme reduction of the size of the uropod 3, absence of apical setae on telson, absence of comb-scales on gnatopods 1 and 2, absence of curved seta on inner ramus of uropod 1 and sternal gills tubular on pereonites 3 to 7. The new species presents similarities with some cave species of the genus, apparently being troglophile and that is the process of adaptation to the hypogean habitat. The importance of creating new protected areas for the conservation of Hyalella in Brazil is discussed. 

scholarly journals Dioscorea sphaeroidea (Dioscoreaceae), a threatened new species from the high-altitude grasslands of southeastern Brazil with wingless seeds

Phytotaxa ◽  
2014 ◽  
Vol 163 (4) ◽  
pp. 229 ◽  
Author(s):  
Ricardo Sousa Couto ◽  
ROSANA CONRADO LOPES ◽  
JOÃO MARCELO ALVARENGA BRAGA
Keyword(s):  
New Species ◽  
High Altitude ◽  
National Park ◽  
Southeastern Brazil ◽  
Morphological Description ◽  
Habitat Distribution ◽  
Risk Of Extinction ◽  
High Altitude Grasslands

Dioscorea sphaeroidea is endemic to the high-altitude grasslands of the Serra dos Órgãos National Park located in southeastern Brazil. Based on the spheroid shape of its fruit and seed, i.e., not flattened or winged, this new species is morphologically unusual in the Dioscorea genus. Moreover, its unique morphology leaves this new species with no clear position in the infrageneric taxonomy of Dioscorea. Herein we present the morphological description of this species, including a discussion of its ecology and habitat, distribution, and preliminary risk of extinction assessment.

scholarly journals New records and geographic distribution of Corythomantis greeningi Boulenger, 1896 (Amphibia: Hylidae)

Check List ◽  
2013 ◽  
Vol 9 (1) ◽  
pp. 148 ◽  
Author(s):  
Leandro Braga Godinho ◽  
Mario Ribeiro Moura ◽  
Renato Neves Feio
Keyword(s):  
Geographic Distribution ◽  
New Records ◽  
Minas Gerais ◽  
The State ◽  
Southeastern Brazil ◽  
Cerrado Biome

We provide new records of Corythomantis greeningi from southeastern Brazil, extending its southernmost distribution. The new records of C. greeningi are from an area of the Cerrado biome, in the State of Minas Gerais.

A new taxonomic arrangement for Paleorhinus scurriensis

2012 ◽  
Vol 103 (3-4) ◽  
pp. 251-263 ◽  
Author(s):  
Michelle R. Stocker
Keyword(s):  
Phylogenetic Analysis ◽  
Single Species ◽  
Cranial Morphology ◽  
Late Triassic ◽  
Morphological Description ◽  
Diagnostic Features ◽  
Anatomical Features ◽  
Cladistic Analyses ◽  
Single Genus ◽  
Multiple Species

ABSTRACTThe paraphyletic genus ‘Paleorhinus’ is understood currently as a cosmopolitan phytosaur taxon from the Late Triassic. There is no consensus regarding the number of species of ‘Paleorhinus,’ with multiple species and genera synonymised into a single genus or even a single species at various points in its published history. The taxonomy is confounded by historical descriptions without the benefit of comparisons to more recently collected specimens, emphasis on plesiomorphic cranial morphology as diagnostic features of the genus, and lack of cladistic analyses. When included in a recent explicitly cladistic phylogenetic analysis, the holotype of ‘Paleorhinus’ scurriensis (TTU P-00539) was found to be the earliest-branching phytosaur with respect to other North American specimens previously referred to ‘Paleorhinus,’ and is generically distinct from Paleorhinus. ‘Paleorhinus’ scurriensis differs from all known phytosaurs in five unambiguous characters: basitubera widely separated mediolaterally; ridge present on lateral surface of jugal; thickened shelf present along posteroventral edge of expanded pterygoid-quadrate wing; ‘septomaxillae’ separated and excluded from internarial septum; and nasal swelling present posterior to posterior borders of nares. This detailed morphological description of an early-branching phytosaur taxon is a first step towards resolving long-standing issues surrounding specific anatomical features and relationships among early members of the clade.

Two new species of Cloeodes Traver (Ephemeroptera: Baetidae) from Espírito Santo, Southeastern Brazil

Zootaxa ◽  
2011 ◽  
Vol 3058 (1) ◽  
pp. 1 ◽  
Author(s):  
FABIANA CRISTE MASSARIOL ◽  
FREDERICO FALCÃO SALLES
Keyword(s):  
New Species ◽  
The State ◽  
Southeastern Brazil ◽  
Labial Palp ◽  
Espírito Santo ◽  
Two New Species ◽  
Fore Femur ◽  
Espirito Santo

In the present work, two new species of Cloeodes Traver are described based on nymphs and adults collected in the State of Espírito Santo, Southeastern Brazil. The main characteristics that distinguish the new species from its congeners are, in C. itajara sp. nov.: a) labrum with dorsal arc of setae composed of 12 setae, b) segment III of labial palp with robust and pectinate setae on inner margin, c) fore femur with apex projected, with 5−6 blunt setae, d) male imago with abdominal terga V−VII with a anterolateral triangular black mark; in C. aymore sp. nov.: a) labrum with dorsal arc of setae composed of 1 + 0 + 3 setae, b) fore femur with apex projected, with 2 blunt setae, c) male imago with abdominal terga IV with kidney-like median brown mark.

Taxonomic Revision of Coleostachys (Malpighiaceae)

Phytotaxa ◽  
2016 ◽  
Vol 277 (1) ◽  
pp. 77 ◽  
Author(s):  
RAFAEL FELIPE DE ALMEIDA ◽  
CLIMBIÊ FERREIRA HALL
Keyword(s):  
Taxonomic Revision ◽  
Single Species ◽  
Morphological Description ◽  
Distribution Map ◽  
Line Drawings

Coleostachys is a monospecific genus of Neotropical Malpighiaceae, known in the literature from only two collections. After a thorough analysis of Brazilian and International herbaria, we present a taxonomic revision of Coleostachys. This work includes a complete morphological description of the genus and its single species, C. genipifolia, along with line drawings and photograph plates, a distribution map, and comments on taxonomy, ecology and conservation of this obscure Amazonian genus.

Breeding ecology of Scinax trapicheiroi (Anura, Hylidae) at a creek in the Atlantic Rainforest of Ilha Grande, southeastern Brazil

2004 ◽  
Vol 25 (3) ◽  
pp. 277-286 ◽  
Author(s):  
Vitor Nelson Borges ◽  
Monique Van Sluys ◽  
Miguel Rico ◽  
Carlos Rocha
Keyword(s):  
Atlantic Rainforest ◽  
Southeastern Brazil ◽  
Breeding Ecology ◽  
Structural Factors ◽  
Temporal And Spatial Distribution ◽  
Small Stream ◽  
Aggregate Distribution ◽  
Fast Development ◽  
Unpredictable Environment ◽  
Janeiro State

AbstractWe analyzed the breeding biology in a population of the hylid Scinax trapicheiroi and evaluated how some environmental and structural factors affect the temporal and spatial distribution of the clutches. Fieldwork was carried out at a small stream running inside the Atlantic Rainforest at Ilha Grande, an island in Rio de Janeiro State, southeastern Brazil, from October 2000 to September 2001. Breeding occurred all year round, but the presence of females and clutches was affected by rain from the previous days. Clutches had an aggregate distribution, because they were mainly laid on lentic waters (with slow water flow). Rain affected the availability, stability and size of ponds. The high numbers of eggs per clutch, and the fast development of eggs and larvae are influenced by an unpredictable environment.

scholarly journals Spatial distribution of the litter carbon stock in the Cerrado biome in Minas Gerais state, Brazil

2017 ◽  
Vol 41 (5) ◽  
pp. 580-589 ◽  
Author(s):  
Vinícus Augusto Morais ◽  
José Marcio de Mello ◽  
Carlos Rogério de Mello ◽  
Carlos Alberto Silva ◽  
José Roberto Soares Scolforo
Keyword(s):  
Organic Matter ◽  
Carbon Content ◽  
Carbon Stock ◽  
Minas Gerais ◽  
Southeastern Brazil ◽  
Cerrado Biome ◽  
Carbon Biomass ◽  
C Stocks ◽  
Minas Gerais State ◽  
C Stock

ABSTRACT Litter corresponds to the layer of decomposing dead organic matter present on the soil surface. This layer is very important for nutrient cycling and contributes with organic matter accumulation in the soil, besides the carbon stock. The objective herein was to quantify the carbon biomass, both content and stock, and map the litter C-stock in the Cerrado biome, which is formed by Savanna Grassland (SG), Cerrado Stricto Sensu (CE) and Forest Savanna (FS), in Minas Gerais state, southeastern Brazil. The data were collected in 26 fragments in Minas Gerais state, totaling 210 sampling locations. A variographic study was conducted and, for mapping, the ordinary kriging method was used for delimitation of homogeneous zones. It was possible to detect high variability in the carbon biomass, carbon content and C-stock in the Cerrado biome litter in Minas Gerais state. The carbon content presented lower variability, ranging from 40 to 44%, so that it is not responsible for explaining the variability of the litter C-stock. Savanna Grassland and Savanna Forest present, respectively, the lowest and highest C-stocks. C-stock presented a considerable spatial structure dependence, allowing to use the geostatistical procedures for mapping it in the Cerrado biome of the Minas Gerais state. The C-stock kriging map showed good accuracy, allowing to verify that the lowest C-stocks in the litter are found from the center to the northern of the Minas Gerais since the highest air temperatures are also verified in this direction.

Camelobaetidius francischettii: a new species of Baetidae (Ephemeroptera) from Brazil

Zootaxa ◽  
2005 ◽  
Vol 1027 (1) ◽  
pp. 46 ◽  
Author(s):  
F. F. SALLES ◽  
M. B. ANDRADE ◽  
E. R. DA-SILVA
Keyword(s):  
New Species ◽  
Abdominal Segment ◽  
The Other ◽  
Southeastern Brazil ◽  
Fore Tibia ◽  
Labial Palp ◽  
Ventral Margin ◽  
Terminal Filament ◽  
Fore Femur ◽  
A New Species

Camelobaetidius francischettii, new species, is described based on nymphs collected from Alagoas and Rio de Janeiro states, Northeastern and Southeastern Brazil, respectively. The species can be distinguished from the other described species of the genus by the following combination of characters: (1) segment 2 of labial palp with distomedial process rounded and strongly produced; (2) fore femora with prominent protuberance; (3) fore tibia with indentation at apex; (4) ventral margin of fore femur and fore tibia entirely scattered with spines; (5) tarsal claws with 34 to 37 denticles; (6) small thoracic gill at the base of fore coxae; (7) prosternum with a single, medial protuberance; (8) paraprocts with ca. 22 marginal small spines; and (9) terminal filament about as long as the length of the 10 th abdominal segment.

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