scholarly journals Frustulia tunariensis sp. nov. (Bacillariophyceae) from the Andes of Bolivia, South America

Diversity ◽  
2020 ◽  
Vol 12 (9) ◽  
pp. 362
Author(s):  
Eduardo A. Morales
Keyword(s):  
Literature Review ◽  
South America ◽  
High Altitude ◽  
New Taxon ◽  
Single Row ◽  
Longitudinal Ribs ◽  
The Andes ◽  
Geographic Coverage ◽  
Bolivian Altiplano

Frustulia tunariensis sp. nov. is originated from a high-altitude peatland in the Tunari Cordillera, a branch of the Andean range in Bolivia. The new taxon is distinguished by the thick longitudinal ribs, the globose polar nodule with faint helictoglossa that does not produce an apical extension, and by the high areola and stria density, not found in any of the morphologically closely related taxa. Features of the folded valvocopula, such as the presence of a siliceous membrane as pars interior, and poroids present in the tube-like portion opening as slits to the valve interior and as a single row of poroids to the exterior, are also unique characters in the new taxon. Based on a literature review, a comparison of the newly proposed species with morphologically similar taxa was made. Also, published information shows the potential of girdle bands to distinguish groups of species and species themselves within Frustulia. Likewise, remarks on the ecological and distribution aspects of Frustulia in the Bolivian Altiplano are included, focusing on taxonomic quality, geographic coverage and sampling, and potential to represent the genus in the high Bolivian Andean plateau.

Revision of the Phyllachoraceae (Ascomycota) on hosts in the angiosperm family, Proteaceae

2001 ◽  
Vol 14 (2) ◽  
pp. 283 ◽  
Author(s):  
Ceridwen A. Pearce ◽  
Paul Reddell ◽  
Kevin D. Hyde
Keyword(s):  
Literature Review ◽  
South America ◽  
Herbarium Material

A literature review yielded seven Australian taxa within the Phyllachoraceae recorded from hosts in the angiosperm family Proteaceae, with three taxa from overseas. New collections and herbarium material were examined by using traditional microscopic characters. Seven new Australian taxa were identified. These include Phyllachora banksiae subsp. westaustraliensis on Banksia speciosa, Phyllachora tjapukiensis on Darlingia darlingiana, Phyllachora kylei on Dryandra spp., Phyllachora amplexicaulii on Hakea amplexicaulis, Phyllachora grevilleae subsp. clelandii on Hakea clavata and H. vittata, Phyllachora hakeicola subsp. cuttacuttae on Hakea arborescens and Phyllachora hakeicola subsp. tasmaniensis on Hakea lissosperma. We now recognise nine species, four subspecies and one variety within the Phyllachoraceae on Proteaceae in Australia, and Phyllachora rhopalina var. rhopalina and P. rhopalina var. macrospora from South America. In this paper, these taxa are described and illustrated by using interference contrast micrographs. A key to all known species of Phyllachoraceae on hosts in the Proteaceae is provided.

scholarly journals Cerebral fat embolization with paroxysmal sympathetic hyperactivity syndrome and septic shock at high altitude: a case report and literature review

2021 ◽  
Vol 7 (1) ◽  
Author(s):  
Min Li ◽  
Gang Zhu ◽  
Hao Guo ◽  
Shun Nan Ge ◽  
Guo Dong Gao ◽  
...  
Keyword(s):  
Septic Shock ◽  
Differential Diagnosis ◽  
Case Report ◽  
Literature Review ◽  
High Altitude ◽  
Fat Embolism ◽  
Neurological Rehabilitation ◽  
Case Presentation ◽  
Sympathetic Hyperactivity ◽  
Paroxysmal Sympathetic Hyperactivity

AbstractBackgroundCerebral fat embolism (CFE) syndrome at high altitude was rare complicated with paroxysmal sympathetic hyperactivity (PSH) syndrome and septic shock. It is a challenge to differential diagnosis and treatment at high altitude.Case presentationThis case presents a CFE with PSH and septic shock of a 23-year-old man occurred at high altitude of 3800 m above sea level, transferred by airplane successfully and cured in the department of neurosurgery, Xi’an Tangdu Hospital.ConclusionsIt is key that CFE with PSH can be rapid diagnosed and treatment bundles of septic shock should be initiated as soon as possible. Early neurological rehabilitation played an important role for good outcome.

scholarly journals Future climate change will impact the size and location of breeding and wintering areas of migratory thrushes in South America

The Condor ◽  
2021 ◽  
Author(s):  
Natália Stefanini Da Silveira ◽  
Maurício Humberto Vancine ◽  
Alex E Jahn ◽  
Marco Aurélio Pizo ◽  
Thadeu Sobral-Souza
Keyword(s):  
Climate Change ◽  
South America ◽  
Migratory Birds ◽  
Global Climate ◽  
Future Climate ◽  
Future Climate Change ◽  
Ecological Niche Models ◽  
Global Climate Changes ◽  
The Andes ◽  
Wintering Areas

Abstract Bird migration patterns are changing worldwide due to current global climate changes. Addressing the effects of such changes on the migration of birds in South America is particularly challenging because the details about how birds migrate within the Neotropics are generally not well understood. Here, we aim to infer the potential effects of future climate change on breeding and wintering areas of birds that migrate within South America by estimating the size and elevations of their future breeding and wintering areas. We used occurrence data from species distribution databases (VertNet and GBIF), published studies, and eBird for 3 thrush species (Turdidae; Turdus nigriceps, T. subalaris, and T. flavipes) that breed and winter in different regions of South America and built ecological niche models using ensemble forecasting approaches to infer current and future potential distributions throughout the breeding and wintering periods of each species. Our findings point to future shifts in wintering and breeding areas, mainly through elevational and longitudinal changes. Future breeding areas for T. nigriceps, which migrates along the Andes Mountains, will be displaced to the west, while breeding displacements to the east are expected for the other 2 species. An overall loss in the size of future wintering areas was also supported for 2 of the species, especially for T. subalaris, but an increase is anticipated for T. flavipes. Our results suggest that future climate change in South America will require that species shift their breeding and wintering areas to higher elevations in addition to changes in their latitudes and longitude. Our findings are the first to show how future climate change may affect migratory birds in South America throughout the year and suggest that even closely related migratory birds in South America will be affected in different ways, depending on the regions where they breed and overwinter.

scholarly journals The tadpole of Hypsiboas atlanticus (Anura, Hylidae) from northeastern Brazil

2009 ◽  
Vol 99 (4) ◽  
pp. 431-436 ◽  
Author(s):  
Filipe A. C. do Nascimento ◽  
Marcelo G. de Lima ◽  
Gabriel O Skuk ◽  
Rafael O. de Sá
Keyword(s):  
South America ◽  
Species Group ◽  
Northeastern Brazil ◽  
Oral Disc ◽  
Single Row ◽  
The Status

The tadpole of Hypsiboas atlanticus (Caramaschi & Velosa, 1996) is described from the municipality of Maceió, State of Alagoas, Brazil. At stage 36 the larvae have an overall elliptical body in lateral and dorsal views, oral disc anteroventral, spiracular tube sinistral, and labial tooth row formula 2(1,2)/3(1). The oral disc is surrounded, almost completely (anterior medial gap present) by a single row of marginal papillae. Described tadpoles of the H. punctatus species group can be differentiated by a combined disc oral features. Additional descriptions of H. punctatus (Schneider, 1799) tadpoles from populations throughout South America may be helpful in determining the status of these populations.

scholarly journals Predicting the distribution of Omalonyx (Mollusca: Pulmonata: Succineidae) species from literature review, museum databases and new sampling efforts in Brazil

2018 ◽  
Vol 18 (1) ◽  
Author(s):  
Daniel Coscarelli ◽  
Lângia C. Montresor ◽  
Philip Russo ◽  
Alan Lane de Melo ◽  
Teofânia H.D.A. Vidigal
Keyword(s):  
Literature Review ◽  
South America ◽  
Species Distribution ◽  
First Record ◽  
Neotropical Region ◽  
Bioclimatic Variables ◽  
Distributional Information ◽  
Consistent Performance ◽  
Using Data ◽  
Hydrographic Regions

Abstract Accurate distributional information is crucial for studies on systematics, biodiversity and conservation. To improve the knowledge regarding the geographical distribution of Omalonyx in South America, we present updated information based on data from a literature review, institutional collections and malacological surveys. All this information composed the dataset used to predict species distribution employing the Maximum Entropy Algorithm (MaxEnt). The model was run using data on species distribution, altitude and bioclimatic variables (WorldClim database). The model had consistent performance, and areas presenting similar conditions to areas where the species were recorded were considered areas of occurrence. The predicted occurrence areas included those that were already surveyed and those that are considered potential occurrence areas. The results demonstrate that the genus has widespread distribution in the Neotropical region and occurs in the tropical, temperate and arid regions of South America and Lesser Antilles. Omalonyx spp. were recorded in all South American countries and hydrographic regions. However, in some countries, there were only isolated records (ex: Colombia and Ecuador). Here, we also present the first record of Omalonyx spp. in four Brazilian States (Acre, Rondônia, Piaui, and Amapá). The genus was found in all hydrographic regions within Brazil and among 27 federative unities; it was absent from only two unities (Roraima State and Distrito Federal). This work contributes to the knowledge on Omalonyx spp. distribution and provides an important basis for the work of ecologists and taxonomists.

Sign in / Sign up

Export Citation Format

Share Document