scholarly journals Fossil Holocene Ostracoda from the Itapeva Lake, Southern Brazilian coastal plain

2021 ◽  
Vol 24 (2) ◽  
pp. 79-89
Author(s):  
Leonardo Timm Steiner Campos ◽  
Lucas de Oliveira Nunes ◽  
Cristianini Trescastro Bergue
Keyword(s):  
Coastal Plain ◽  
Rio Grande ◽  
Taxonomic Composition ◽  
Rio Grande Do Sul ◽  
The Core ◽  
Lagoon System ◽  
Hydrological Changes ◽  
Frequent Species ◽  
Coastal Paleoenvironments

Holocene ostracods from a core obtained in the Itapeva Lake, Rio Grande do Sul coastal plain, are studied in this paper. Twenty-six species belonging to 22 genera and 13 families were registered in nine samples analyzed, two of them new: Cytherella eros sp. nov. and Loxoconcha itapevensis sp. nov. The taxonomic composition of the assemblages varies along the core, being Cyprideis multidentataHartmann the most abundant and frequent species (273 specimens), followed by Cytheretta punctata Sanguinetti (56 specimens) and L.itapevensis sp. nov. (51 specimens). Variation in richness and diversity observed along the core probably results from sedimentary and hydrological changes during the evolution of the Itapeva Lake. The results obtained in this work reinforce the importance of ostracods in the study of coastal paleoenvironments. Keywords: barrier-lagoon system, biostratinomy, micropaleontology, Quaternary.

Molecular Detection of Trypanosoma kaiowa in Tabanus triangulum (Diptera: Tabanidae) from the Coastal Plain of Rio Grande do Sul, Southern Brazil

2021 ◽  
Author(s):  
Gratchela D. Rodrigues ◽  
Eduardo Blodorn ◽  
Ândrio Zafalon-Silva ◽  
William Domingues ◽  
Roberta Marques ◽  
...  
Keyword(s):  
Coastal Plain ◽  
Molecular Detection ◽  
Rio Grande ◽  
Southern Brazil ◽  
Rio Grande Do Sul

Provenance of Heavy Minerals for the Quaternary Coastal Plain of Southernmost Brazil (Rio Grande do Sul State)

2019 ◽  
Vol 35 (2) ◽  
pp. 295
Author(s):  
Julierme Justin Carassai ◽  
Ernesto Luiz Correa Lavina ◽  
Farid Chemale Junior ◽  
Tiago Jonatan Girelli
Keyword(s):  
Coastal Plain ◽  
Rio Grande ◽  
Heavy Minerals ◽  
Rio Grande Do Sul

Three new species of Hyalella (Crustacea: Amphipoda: Hyalellidae) from the Southern Brazilian Coastal Plain

Zootaxa ◽  
2021 ◽  
Vol 4970 (2) ◽  
pp. 257-292
Author(s):  
JORDAN TUPARAI TALHAFERRO ◽  
ALESSANDRA ANGÉLICA DE PÁDUA BUENO ◽  
MATEUS MARQUES PIRES ◽  
CRISTINA STENERT ◽  
LEONARDO MALTCHIK ◽  
...  
Keyword(s):  
New Species ◽  
Body Surface ◽  
Coastal Plain ◽  
Rio Grande ◽  
Plumose Seta ◽  
The State ◽  
Rio Grande Do Sul ◽  
Santa Catarina ◽  
Smooth Body ◽  
Three New Species

In this study, three new species of Hyalella (Crustacea: Amphipoda: Hyalellidae) are described based on specimens collected in wetlands located in three freshwater ecoregions (Southeastern Mata Atlântica, Tramandaí-Mampituba and Laguna dos Patos) of the southern Brazilian Coastal Plain (states of Rio Grande do Sul and Santa Catarina). Hyalella minuana n. sp. was recorded in the southernmost region of the state of Rio Grande do Sul. This species is characterized by presenting smooth body surface, epimeral plates not acuminated, nine serrate setae on the inner face of gnathopod 1, and peduncle of uropod 3 with four cuspidate setae with accessory seta and without plumose seta on the margin of the telson. Hyalella lagoana n. sp. was recorded in the northern region of Rio Grande do Sul and southern region of Santa Catarina. This species shows body surface smooth, epimeral plates not acuminated, nine serrate setae on the inner face of gnathopod 1, peduncle of uropod 3 with five cuspidate setae with accessory seta, and telson with six cuspidate setae with accessory seta without plumose seta on the margins. Hyalella sambaqui n. sp. was recorded in the state of Santa Catarina. This species is characterized by presenting smooth body surface, epimeral plates not acuminated, six serrate setae on the inner face of gnathopod 1, peduncle of uropod 3 with three cuspidate setae with accessory seta, and telson with three cuspidate setae with accessory seta and four plumose setae on the margin of the telson.                The new records elevates the known diversity of species of Hyalella in the Brazilian territory to 33 species (19 in the southern Brazilian region) and to 83 species in the Americas. 

ESR dating of Pleistocene mammals and marine shells from the coastal plain of Rio Grande do Sul state, southern Brazil

2014 ◽  
Vol 352 ◽  
pp. 124-134 ◽  
Author(s):  
Renato P. Lopes ◽  
Angela Kinoshita ◽  
Oswaldo Baffa ◽  
Ana Maria Graciano Figueiredo ◽  
Sérgio Rebello Dillenburg ◽  
...  
Keyword(s):  
Coastal Plain ◽  
Rio Grande ◽  
Southern Brazil ◽  
Rio Grande Do Sul ◽  
Esr Dating ◽  
Pleistocene Mammals

scholarly journals Species composition and diel variation of a butterfly taxocene (Lepidoptera, Papilionoidea and Hesperioidea) in a restinga forest at Itapuã State Park, Rio Grande do Sul, Brazil

2006 ◽  
Vol 23 (2) ◽  
pp. 443-454 ◽  
Author(s):  
Maria O. Marchiori ◽  
Helena P. Romanowski
Keyword(s):  
Coastal Plain ◽  
General Trend ◽  
Rio Grande ◽  
Abundant Species ◽  
Butterfly Species ◽  
Diel Variation ◽  
Rio Grande Do Sul ◽  
Sandy Forest ◽  
Diversity Estimates ◽  
Hourly Variation

The composition and the hourly variation of butterfly species (Lepidoptera: Papilionoidea and Hesperioidea) throughout the day and the seasons was evaluated in a 1,000 m² patch of sandy forest (Restinga forest) on a coastal plain at Itapuã State Park (30º22'S, 51º02'W), Viamão, Rio Grande do Sul, from July 2001 to June 2002. Butterflies were sampled by scanning and focal observations (adapted from ALTMANN 1974) carried out at successive 45 minutes intervals. This methodology proved to be effective in recording the presence and activity of butterflies on a small area. A total of 108 observation hours yielded 326 butterflies from 41 species, 33 genera and five families. Nymphalidae was the most abundant family contributing with 74% of the total individuals. The most abundant species was Eunica eburnea Fruhstorfer, 1907 (Nymphalidae) with 45 individuals registered along the year. General diversity estimates were Dmg = 6.912, H' = 3.012 and d = 0.138. Although there were variations in the daily times of butterfly activity throughout the seasons, there was a general trend for higher activity during the morning period, between 9:00 and 11:45 h.

scholarly journals Quantitative fidelity of recent freshwater mollusk assemblages from the Touro Passo River, Rio Grande do Sul, Brazil

2006 ◽  
Vol 96 (4) ◽  
pp. 453-465 ◽  
Author(s):  
Alcemar R. Martello ◽  
Carla B. Kotzian ◽  
Marcello G. Simões
Keyword(s):  
Dominant Species ◽  
Rank Order ◽  
Rio Grande ◽  
Taxonomic Composition ◽  
Small Scale ◽  
Rio Grande Do Sul ◽  
Main River ◽  
Main River Channel ◽  
Structure Of Communities ◽  
Uruguay River

This study represents one of the first contributions to the knowledge on the quantitative fidelity of the recent freshwater molluscan assemblages in subtropical rivers. Thanatocoenoses and biocoenoses were studied in straight and meandering to braided sectors, in the middle course of the Touro Passo River, a fourth-order tributary of the Uruguay River, located in the westernmost part of the State of Rio Grande do Sul. Samplings were carried out through quadrats of 5 m², five in each sector. A total area of 50 m² was sampled. Samplings were also made in a lentic environment (abandoned meander), with intermittent communication with the Touro Passo River, aiming to record out-of-habitat shell transportation from the lentic communities to the main river channel. The results show that, despite the frequent oscillation of the water level, the biocoenosis of the Touro Passo River shows high ecological fidelity and undergoes little influence from the lentic vicinal environments. The taxonomic composition and some features of the structure of communities, especially the dominant species, also reflect some ecological differences between the two main sectors sampled, such as the complexity of habitats in the meandering-sector. Regarding the quantitative fidelity, 60% of the species found alive were also found dead and 47.3% of the species found dead were also found alive, at river-scale. However, 72% of the dead individuals belong to species also found alive. This value might be related with the good rank order correlation obtained for live/dead assemblages. Consequently, the dominant species of the thanatocoenoses could be used to infer the ecological attributes of the biocoenoses. The values of all the indexes analyzed were very variable in small-scale samplings (quadrat), but were more similar to others registered in previous studies, when they were analyzed in a station and river scale.

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