Barysoma lenzii (Synapsida: Dicynodontia) from the Middle Triassic of Brazil, a synonym of Stahleckeria potens

1993 ◽  
Vol 67 (2) ◽  
pp. 318-321 ◽  
Author(s):  
Spencer G. Lucas
Keyword(s):  
Body Length ◽  
Middle Triassic ◽  
Rio Grande ◽  
Upper Triassic ◽  
The Other ◽  
Southern Brazil ◽  
Rio Grande Do Sul ◽  
Local Fauna ◽  
Santa Maria ◽  
Subjective Synonym

Huene (1935) first reported dicynodonts from the Triassic Santa Maria Formation of southern Brazil. Most common are specimens of Dinodontosaurus from localities near Chiniquà (Chiniquà local fauna) and near Candelaria (Candelaria local fauna) in the state of Rio Grande do Sul. The other Middle Triassic dicynodont found near Chiniquà is the huge (about 3 m body length) Stahleckeria potens, and an equally large Middle Triassic dicynodont, Barysoma lenzii, is known from near Candelaria. A fourth, supposed Santa Maria Formation dicynodont, Jachaleria candelariensis (Araújo and Gonzaga, 1990), is actually from a younger, Upper Triassic, horizon of the Caturrita Formation near Candelaria (Bonaparte, 1982). Here, I argue that Barysoma lenzii is a junior subjective synonym of Stahleckeria potens and discuss the biochronological significance of this synonymy.

scholarly journals New insights onPrestosuchus chiniquensisHuene, 1942 (Pseudosuchia, Loricata) based on new specimens from the “Tree Sanga” Outcrop, Chiniquá Region, Rio Grande do Sul, Brazil

PeerJ ◽  
2016 ◽  
Vol 4 ◽  
pp. e1622 ◽  
Author(s):  
Marcel B. Lacerda ◽  
Bianca M. Mastrantonio ◽  
Daniel C. Fortier ◽  
Cesar L. Schultz
Keyword(s):  
Middle Triassic ◽  
Rio Grande ◽  
Global Distribution ◽  
Taxonomic Resolution ◽  
Southern Brazil ◽  
Rio Grande Do Sul ◽  
New Material ◽  
Assemblage Zone ◽  
Santa Maria

The ‘rauisuchians’ are a group of Triassic pseudosuchian archosaurs that displayed a near global distribution. Their problematic taxonomic resolution comes from the fact that most taxa are represented only by a few and/or mostly incomplete specimens. In the last few decades, renewed interest in early archosaur evolution has helped to clarify some of these problems, but further studies on the taxonomic and paleobiological aspects are still needed. In the present work, we describe new material attributed to the ‘rauisuchian’ taxonPrestosuchus chiniquensis, of theDinodontosaurusAssemblage Zone, Middle Triassic (Ladinian) of the Santa Maria Supersequence of southern Brazil, based on a comparative osteologic analysis. Additionally, we present well supported evidence that these represent juvenile forms, due to differences in osteological features (i.e., a subnarial fenestra) that when compared to previously described specimens can be attributed to ontogeny and indicate variation within a single taxon of a problematic but important osteological structure in the study of ‘rauisuchians.’

A Flora Dicroidium no Rio Grande do Sul: implicações bioestratigráficas

1999 ◽  
Vol 26 (1) ◽  
pp. 3
Author(s):  
MARGOT GUERRA SOMMER ◽  
MIRIAM CAZZULO KLEPZIG ◽  
ROBERTO IANNUZZI ◽  
LAUREN SALLY ALVES
Keyword(s):  
South Africa ◽  
Central Region ◽  
Middle Triassic ◽  
Rio Grande ◽  
The State ◽  
Southern Brazil ◽  
Rio Grande Do Sul ◽  
Paraná Basin ◽  
Parana Basin ◽  
Santa Maria

A Triassic taphoflora identified in the Central Region of the State of Rio Grande do Sul, southern Brazil, represents an important biostratigraphic stage in the paleofloristic succession of the Paraná Basin. This megafloristic association is composed of compressed leaves, fronds and seeds of a “Dicroidium Flora” and shows a predominance of the Dicroidium genus, with several species, and other important taxa like Neocalamites sp, Cladophlebis sp, Tetraptilon aff, heteromerum, Ginkgoites Antarctica, Sphenobaiera sp, Podozamites sp, Nilssonia sp, Pteruchus sp and Carpolithus sp. Taking into account the stratigraphical distribution of different species of the Dicroidium genus, a biostratigraphic framework was established. The biostratigraphical position of this Triassic flora was established by comparison with Triassic floras from Argentina, South Africa and Australasia. Considering that the recognition of this Dicroidium Flora was based on limited outcrops belonging to one lithostratiphic level (Santa Maria Formation – Passo das Tropas Facies), it was impossible to establish a formal biostratigraphic zonation. Instead, at present time, an informal floristic interval, named “Dicroidium odontopteroides Flora” is proposed (Late Anisian to Late Ladinian, Middle Triassic).

scholarly journals LOCAL BEEF PRODUCTION: WHAT RIO GRANDE DO SUL IS WAITING FOR?

2017 ◽  
Vol 10 (2) ◽  
pp. 312 ◽  
Author(s):  
Tamara Esteves de Oliveira ◽  
David Santos Freitas
Keyword(s):  
Rio Grande ◽  
The State ◽  
The Other ◽  
Southern Brazil ◽  
Rio Grande Do Sul ◽  
Beef Production ◽  
Beef Demand ◽  
Small Producers ◽  
Santa Maria ◽  
Very High

This research aims to verify the municipalities where it might be interesting to invest in a local beef production in the State of Rio Grande do Sul (RS), southern Brazil. The data analyzed combine the cattle units slaughtered and the estimated beef consumption in each municipality. These indicators were used to identify the capacity of each location to meet the local beef demand. This data were associated to the map of RS by the Quantum GIS 1.8 Lisboa software. The most prominent regions were located at the western frontier, at the southeast Campanha, and at the northeast mountain region of the State. The cattle units slaughtered produced at the municipalities of Aceguá, Pedras Altas, Machadinho, São Valentim, Quatro Irmãos and Sagrada Família is very high, surpassing the municipality’s capacity to absorb it. On the other hand, many municipalities have sufficient productions or little surplus to attend the local beef demand, such as Alegrete, in which a local beef production might benefit a higher number of small producers, but other municipalities also seem to have potential for assisting familiar farmers with this strategy such as Dom Pedrito, Bagé, Santa Maria and Pelotas.

scholarly journals Toxomerus duplicatus Wiedemann, 1830 (Diptera: Syrphidae) preying on Microtheca spp. (Coleoptera: Chrysomelidae) larvae

2014 ◽  
Vol 74 (3) ◽  
pp. 656-658 ◽  
Author(s):  
VS Sturza ◽  
STB Dequech ◽  
M Toebe ◽  
TR Silveira ◽  
A Cargnelutti Filho ◽  
...  
Keyword(s):  
Pest Management ◽  
Raphanus Sativus ◽  
Insect Pests ◽  
Rio Grande ◽  
Integrate Pest Management ◽  
Southern Brazil ◽  
Rio Grande Do Sul ◽  
New Information ◽  
Raphanus Sativus L ◽  
Santa Maria

Microtheca spp. (Coleoptera: Chrysomelidae) are insect pests primarily related to Brassicaceae crops. In the State of Rio Grande do Sul (RS), southern Brazil, they are found on forage turnip, Raphanus sativus L. var. oleiferus Metzg., which is commonly grown during fall/winter seasons. This work reports the predation of Microtheca spp. larvae by Toxomerus duplicatus Wiedemann, 1830 (Diptera: Syrphidae) larvae, on forage turnip crop, in Santa Maria, RS. This register provides new information about Microtheca spp. natural enemies in Brazil, which might be a new option for integrate pest management of these species.

scholarly journals Arthropods associated with young orchard of pecan in southern Brazil

2020 ◽  
Vol 87 ◽  
Author(s):  
Jardel Boscardin ◽  
Ervandil Côrrea Costa ◽  
Marciane Danniela Fleck ◽  
Jéssica Maus da Silva ◽  
Karine Schoeninger ◽  
...  
Keyword(s):  
Rio Grande ◽  
Carya Illinoinensis ◽  
Southern Brazil ◽  
Rio Grande Do Sul ◽  
Santa Maria

RESUMO: A produção mundial de noz-pecã Carya illinoinensis (Juglandaceae) é liderada pelos Estados Unidos. No Brasil, em especial no Rio Grande do Sul, houve uma expansão da área plantada com a cultura nos últimos anos. No entanto, faltam pesquisas relacionadas à entomofauna associada à noz-pecã, bem como práticas culturais que auxiliem no Manejo Integrado de Pragas, mesmo havendo uma expansão da cultura. Assim, o presente estudo objetivou avaliar a fauna de artrópodes na copa de plantas de C. illinoinensis, submetido a diferentes manejos de solo, em Santa Maria, Rio Grande do Sul, Brasil. Para tanto, utilizou-se delineamento experimental de blocos ao acaso, com cinco blocos e quatro tratamentos: plantio em cova pequena, com 20 × 60 cm (Sp); utilização de subsolador mais grade niveladora e cova pequena (Ssp); utilização de enxada rotativa e cova pequena (Tsp); e plantio em cova grande, com 40 × 60 cm (Lp). De novembro de 2014 a maio de 2015, foram coletadas 7.617 espécimes nas copas de árvores jovens de nogueira-pecã. Foram identificados 150 grupos taxonômicos, sendo Coleoptera a ordem com maior riqueza de espécies. Monellia caryella (Hemiptera: Aphididae) apresentou elevada densidade. Foram registrados os inimigos naturais himenópteros parasitoides e Coccinellidae. Conclui-se que a artropodofauna em copas de plantas jovens de nogueira-pecã apresenta diversidade similar entre os tratamentos e predomínio de M. caryella nas áreas avaliadas.

scholarly journals Genetics, surnames, grandparents' nationalities, and ethnic admixture in Southern Brazil: Do the patterns of variation coincide?

1999 ◽  
Vol 22 (2) ◽  
pp. 151-161 ◽  
Author(s):  
C.L. Dornelles ◽  
S.M. Callegari-Jacques ◽  
W.M. Robinson ◽  
T.A. Weimer ◽  
M.H.L.P. Franco ◽  
...  
Keyword(s):  
Gene Pool ◽  
Rio Grande ◽  
The Other ◽  
Data Sets ◽  
Significant Heterogeneity ◽  
Historical Records ◽  
Lower Prevalence ◽  
Southern Brazil ◽  
Rio Grande Do Sul ◽  
European Descent

A total of 2,708 individuals from the European-derived population of Rio Grande do Sul, divided into seven mesoregions, and of 226 individuals of similar origin from Santa Catarina were studied. Seventeen protein genetic systems, as well as grandparents' nationalities, individuals' surnames, and interethnic admixture were investigated. The alleles which presented the highest and lowest differences were GLO1*2 (16%) and PGD*A (2%), respectively, but in general no significant genetic differences were found among mesoregions. The values observed were generally those expected for individuals of European descent, with the largest difference being a lower prevalence (34-39%) of P*1. Significant heterogeneity among mesoregions was observed for the other variables considered, and was consistent with historical records. The Amerindian contribution to the gene pool of European-derived subjects in Rio Grande do Sul was estimated to be as high as 11%. Based on the four data sets, the most general finding was a tendency for a northeast-southwest separation of the populations studied. Seven significant phenotype associations between systems were observed at the 5% level (three at the 0.1% level). Of the latter, the two most interesting (since they were also observed in other studies) were MNSs/Duffy and Rh/ACP.

scholarly journals Levantamento da fauna de Coleoptera (Insecta) associada à carcaça de roedores na região Sul do Brasil

2017 ◽  
Vol 10 (3) ◽  
pp. 162-169
Author(s):  
Vinícius Costa-Silva ◽  
Patricia Jacqueline Thyssen ◽  
Rocco Alfredo Di Mare
Keyword(s):  
Organic Matter ◽  
Atlantic Forest ◽  
Rattus Norvegicus ◽  
Rio Grande ◽  
Rural Environment ◽  
Pitfall Traps ◽  
Rio Grande Do Sul ◽  
Local Fauna ◽  
Seasonal Behavior ◽  
Santa Maria

Resumo. Coleoptera (Arthropoda, Insecta) está entre os grupos mais importantes de organismos associados à matéria orgânica em decomposição e por isso podem ser úteis para elucidar questões no âmbito criminal. A riqueza e a abundância de besouros, incluindo os necrófagos, podem variar de acordo com as condições climáticas e fisiogeográficas presentes em diferentes regiões, tornando-se assim relevante o conhecimento da entomofauna local. A partir disso, o objetivo deste estudo foi levantar a fauna local e registrar o comportamento sazonal de espécies de coleópteros associados a carcaças de roedor expostas em ambiente silvestre no município de Santa Maria, Rio Grande do Sul, Brasil (29°43'02.88"S 53°43'52.24"W). As coletas foram realizadas trimestralmente ao longo de doze meses. Quatro carcaças de Rattus norvegicus (Berkenhout) de aproximadamente 400 g foram expostas, simultaneamente, em cada estação do ano, protegidas por uma gaiola de aço. Foram dispostas quatro armadilhas de queda ao redor de cada carcaça. Um total de 1.856 espécimes pertencentes a 14 famílias de Coleoptera foram coletados. A maior abundância foi observada na primavera (N= 1.006), seguida por verão (N= 518), inverno (N= 319) e outono (N= 26). Registros da fauna necrófaga para o Estado do Rio Grande do Sul ainda são bastante escassos. Além de contribuir com o fomento de banco de dados de espécies de besouros para uso forense, espera-se que estudo possa estimular a realização de mais levantamentos faunísticos, tendo em vista a importância de dois biomas na região Sul no que diz respeito à biodiversidade, o Pampa e a Mata Atlântica.Survey of Coleoptera fauna (Insecta) associated with carcasses of rodents in Southern BrazilAbstract. Coleoptera (Arthropoda, Insecta) is considered one of the most important organism groups associated with organic matter decomposition and therefore may be useful to elucidate issues in the criminal context. The richness and abundance of beetles, including the necrophagous species, may vary according to climatic and physiogeographic conditions in different regions, thus the knowledge of the local entomofauna becomes relevant. Thereby, this study aimed to survey the local fauna and register the seasonal behavior of Coleoptera species associated with rodent carcasses exposed in a rural environment at Santa Maria, Rio Grande do Sul, Brazil (29°43'02.88"S 53°43'52.24"W). The collections were carried out quarterly throughout 12 months. Four Rattus norvegicus (Berkenhout) carcasses weighing approximately 400 g were exposed, simultaneously, in each season, protected by a steel cage. Four pitfall traps were arranged around each carcass. A total of 1,856 specimens belonging to 14 families of Coleoptera were collected. The greatest abundance was observed during spring (N= 1,006), followed by summer (N= 518), winter (N= 319) and fall (N= 26). Records of the necrophagous entomofauna of Rio Grande do Sul are still scarce. Beyond contributing to the database promotion of the necrophagous species of beetle as a forensic purpose, it is expected that this paper may instigate the achievement of more faunistic surveys, regarding the biodiversity matter of two singular biomes present in the South region, Pampa and Atlantic Forest. 

scholarly journals New record and occurrence map of Tityus serrulatus Lutz & Mello, 1922 (Scorpiones, Buthidae) in the state of Rio Grande do Sul, southern Brazil

Check List ◽  
2015 ◽  
Vol 11 (1) ◽  
pp. 1556 ◽  
Author(s):  
Conrado Mario da Rosa ◽  
Arthur Diesel Abegg ◽  
Leandro Malta Borges ◽  
Gabriela S. S Bitencourt ◽  
Rocco Alfredo Di Mare
Keyword(s):  
Urban Area ◽  
Central Region ◽  
New Record ◽  
Rio Grande ◽  
The State ◽  
Southern Brazil ◽  
Rio Grande Do Sul ◽  
Tityus Serrulatus ◽  
First Time ◽  
Santa Maria

The Brazilian scorpion Tityus serrulatus is recorded for the first time in the central region of Rio Grande do Sul, thus filling a gap of 567 km in its distribution. A specimen of the scorpion was collected in the urban area of the municipality of Santa Maria (29°43′51.31″ S, 053°48′5.74″ W) on 31 June 2014. A map was generated with the points of occurrence of the species in the state.

Description of Two New Species of the Genus Vorticella (Ciliophora: Peritrichia) Epibionts on Pomacea canaliculata (Mollusca: Ampullariidae: Gastropoda) in Southern Brazil

Zootaxa ◽  
2018 ◽  
Vol 4508 (2) ◽  
pp. 211
Author(s):  
MARCOS W. O. PEREIRA ◽  
FABIANO CARVALHO De BRITO ◽  
EDUARDO EIZIRIK ◽  
LAURA R. P. UTZ
Keyword(s):  
New Species ◽  
Rio Grande ◽  
The Other ◽  
Pomacea Canaliculata ◽  
Regular Pattern ◽  
Southern Brazil ◽  
Rio Grande Do Sul ◽  
Patos Lagoon ◽  
Two New Species ◽  
Scanning Electron

The peritrich ciliates Vorticella veloxiiforme n.sp. and Vorticella ampullaria n.sp. were found as epibionts on the ampullarid mollusk Pomacea canaliculata collected from Patos Lagoon, Rio Grande do Sul state, Brazil. The detailed morphology of both species was investigated using live and stained specimens, as well as scanning electron microscopy. Zooids of Vorticella veloxiiforme are cup shaped measuring 57 X 41 μm on average. A J-shaped macronucleus lies in the upper half of the cell. One contractile vacuole was observed in the upper part of the cell. V. ampullaria presents an elongate zooid measuring 70 X 25 µm on average. A C-shaped macronucleus lies in the middle of the cell. Two contractile vacuoles are present: one close to the peristome and the other in the lower half of the cell. The pattern of oral polykinetids was typical of the genus, with all infundibular polykinetids composed by three rows of kinetosomes each. SEM revealed a regular pattern of pores present on the zooid membrane of both species. Analyses of the 18s rDNA placed the two new species in the order Vorticellida close to described species of Vorticella. 

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