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. 

Two new species of Tryblionella W. SMITH (Bacillariaceae, Bacillariophyta) from a southern Brazil salt marsh

Phytotaxa ◽  
2019 ◽  
Vol 399 (3) ◽  
pp. 173
Author(s):  
LUCIELLE MERLYM BERTOLLI ◽  
DÁVIA MARCIANA TALGATTI ◽  
THAMIRES MARIAH DA SILVEIRA NASCIMENTO ◽  
LEZILDA CARVALHO TORGAN
Keyword(s):  
New Species ◽  
Light Microscopy ◽  
Salt Marshes ◽  
Southern Brazil ◽  
Rio Grande Do Sul ◽  
Microscopy Observation ◽  
Patos Lagoon ◽  
Wide Range ◽  
Two New Species ◽  
Scanning Electron

Two new species of Tryblionella are described occurring both in epiphytic and microphytobenthic communities from  Patos Lagoon salt marshes, Rio Grande do Sul, southern Brazil. Tryblionella confusa can be misidentified as T. debilis, since the examination under light microscopy provides few characters, besides that, the later species shows a wide amplitude of characters in the literature interfering in the identification. On the other hand, Tryblionella ornata exhibits more distinguishable features in light microscopy observation, which are reinforced by its singular pattern of ornamentation visible under scanning electron microscopy. The species were observed in all sites and periods studied, undergoing a wide range of salinity and pH. No preference of substrate was observed.

New species of the genera Lupaeus and Rubroscirus (Acari: Cunaxidae) from Southern Brazil

2020 ◽  
Vol 25 (12) ◽  
pp. 2224-2234
Author(s):  
Wesley Borges Wurlitzer ◽  
Liana Johann ◽  
Noeli Juarez Ferla ◽  
Guilherme Liberato Da Silva
Keyword(s):  
New Species ◽  
Leaf Litter ◽  
Atlantic Forest ◽  
Rio Grande ◽  
Brazilian Atlantic Forest ◽  
Southern Brazil ◽  
Rio Grande Do Sul ◽  
Santa Catarina ◽  
Two New Species ◽  
Forest Biome

Two new species of Cunaxidae from Brazilian Atlantic Forest biome are described. Lupaeus stolli Wurlitzer & Ferla sp. nov. was collected from Varronia curassavica Jacq. (Boraginaceae), in Santa Catarina state, and Rubroscirus grilloi Wurlitzer & Ferla sp. nov. from Vernonanthura tweediana (Baker) H. Rob., soil and leaf litter, in Rio Grande do Sul state, Brazil.

New species of the genera Lupaeus and Rubroscirus (Acari: Cunaxidae) from Southern Brazil 

2020 ◽  
Vol 25 (12) ◽  
pp. 2320
Author(s):  
Wesley Borges Wurlitzer ◽  
Liana Johann ◽  
Noeli Juarez Ferla ◽  
Guilherme Liberato Da Silva
Keyword(s):  
New Species ◽  
Leaf Litter ◽  
Atlantic Forest ◽  
Rio Grande ◽  
Brazilian Atlantic Forest ◽  
Southern Brazil ◽  
Rio Grande Do Sul ◽  
Santa Catarina ◽  
Two New Species ◽  
Forest Biome

Two new species of Cunaxidae from Brazilian Atlantic Forest biome are described. Lupaeus stolli Wurlitzer & Ferla sp. nov. was from Varronia curassavica Jacq. (Boraginaceae), on Santa Catarina state, and Rubroscirus grilloi Wurlitzer & Ferla sp. nov. was from Vernonanthura tweediana (Baker) H. Rob., soil and leaf litter, on Rio Grande do Sul state, Brazil.

scholarly journals Gauchergasilus euripedesi (Copepoda, Ergasilidae) parasitizing different species of fish from two environments in southern Brazil

2021 ◽  
Vol 16 (2) ◽  
pp. 289-298
Author(s):  
Moisés Gallas ◽  
Laura R. P. Utz
Keyword(s):  
Electron Microscopy ◽  
Fish Species ◽  
Rio Grande ◽  
Parasitic Copepod ◽  
Southern Brazil ◽  
Rio Grande Do Sul ◽  
Porto Alegre ◽  
Patos Lagoon ◽  
Estuarine Area ◽  
Scanning Electron

The parasitic copepod Gauchergasilus euripedesi (Montú, 1980) Montú & Boxshall, 2002 was described from plankton samples and specimens found in four fish species from the estuarine area of Patos Lagoon, state of Rio Grande do Sul (RS), Brazil. Later, one different fish species was reported parasitized with G. euripedesi in the same locality. Species of Astyanax Baird & Girard, 1854 (Astyanax henseli Melo & Buckup, 2006 and Astyanax lacustris (Lütken, 1875)) and Psalidodon Eigenmann, 1911 (Psalidodon eigenmanniorum (Cope, 1894) and Psalidodon aff. fasciatus (Cuvier, 1819)) were collected in two environments (Pintada Island, municipality of Porto Alegre and Itapeva Lagoon, municipality of Terra de Areia, RS) to investigate their parasites. The copepods found in the gill arches were counted, processed, mounted in permanent slides, and photographed using light microscopy, or processed for observation in scanning electron microscopy. Specimens of P. eigenmanniorum from Pintada Island, A. lacustris and P. aff. fasciatus from Itapeva Lagoon, were parasitized by G. euripedesi, with prevalences of 29.03% (A. lacustris), 10.34% (P. eigenmanniorum), and 9.68% (P. aff. fasciatus). Measurements obtained for specimens of G. euripedesi were similar to those found in the literature, except for egg sacs which were larger in the specimens examined in the present study. In addition to being the first report of G. euripedesi parasitizing species of fish (A. lacustris, P. eigenmanniorum, and P. aff. fasciatus), the results presented here also extend the known geographic distribution of the copepod species.

Monteiroa rubra (Malvaceae: Malvoideae), a New Species Endemic to the Southern Brazilian Grasslands

2019 ◽  
Vol 44 (4) ◽  
pp. 851-856
Author(s):  
Martin Grings ◽  
Sérgio Augusto de Loreto Bordignon ◽  
Ilsi Iob Boldrini
Keyword(s):  
New Species ◽  
Rio Grande ◽  
The Other ◽  
Morphological Description ◽  
Similar Species ◽  
Southern Brazil ◽  
Rio Grande Do Sul ◽  
Distribution Map ◽  
A New Species ◽  
Iucn Criteria

Abstract—Monteiroa rubra is described as a remarkable new species from Rio Grande do Sul, Brazil. It is notably distinct from the other ten species of Monteiroa. The new species is morphologically most similar to the four species of the genus with unlobed leaves that also lack cordate leaf bases. Monteiroa rubra apparently is an endemic species known from three localities in wetlands associated with grasslands in Augusto Pestana and Fontoura Xavier municipalities in southern Brazil. A morphological description, distribution map, photographs, ecological notes, and a key to morphologically most similar species are presented. According to IUCN criteria, if a formal assessment were performed, the new species would probably be considered Endangered.

Two new species of Sisyrinchium (Iridaceae) from Subtropical Highland Grasslands of Southern Brazil

Phytotaxa ◽  
2013 ◽  
Vol 88 (1) ◽  
pp. 9 ◽  
Author(s):  
ADRIANA M. AITA ◽  
OLIVIER CHAUVEAU ◽  
TATIANA T. SOUZA-CHIES ◽  
LILIAN EGGERS
Keyword(s):  
New Species ◽  
High Altitude ◽  
Rio Grande ◽  
Similar Species ◽  
Southern Brazil ◽  
Rio Grande Do Sul ◽  
Santa Catarina ◽  
Ecological Information ◽  
Two New Species ◽  
High Altitude Grasslands

Sisyrinchium antemeridianum and S. flabellatum are two new species of Sisyrinchium sect. Hydastylus that occur in the high altitude grasslands of Southern Brazil, in the states of Rio Grande do Sul and Santa Catarina. Sisyrinchium antemeridianum can be distinguished from similar species by the conspicuous rhizome with remnants of old leaves and flowers with larger tepals and longer, connate filaments. Sisyrinchium flabellatum has a distinctive equitant phyllotaxis and a lax inflorescence of numerous flowers with small, typically reflexed tepals. Both species are endemic to the Highlands of Southern Brazil. Morphological descriptions, illustrations and ecological information for both plants are presented.

scholarly journals A systematic review of diapoma (teleostei: characiformes: characidae: stevardiinae: diapomini) with descriptions of two new species from southern Brazil

2011 ◽  
Vol 51 (5) ◽  
pp. 59-82 ◽  
Author(s):  
Naércio A. Menezes ◽  
Stanley H. Weitzman
Keyword(s):  
Systematic Review ◽  
New Species ◽  
Type Species ◽  
Rio Grande ◽  
Reproductive Mode ◽  
Southern Brazil ◽  
Rio Grande Do Sul ◽  
Two New Species ◽  
Coastal Streams ◽  
Dorsal Portion

Diapoma is reviewed and four species are recognized: (1) Diapoma thauma, new species, from streams of the rio Jacuí basin, state of Rio Grande do Sul; (2) D. pyrrhopteryx, new species collected from the rio Canoas and streams flowing into this basin in the states of Rio Grande do Sul and Santa Catarina, Brazil; (3) Diapoma terofali, from streams flowing into rio Uruguay in Uruguay and Rio Grande do Sul, Brazil and streams flowing into rio de la Plata, Argentina; and (4) Diapoma speculiferum, from lowland coastal streams in Rio Grande do Sul, Brazil and Uruguay. Diapoma pyrrhopteryx possess the posteroventral opercular elongation typical of D. speculiferum, type species of the genus, but which is absent in D. thauma and D. terofali. Nonetheless, all the diapomin species have the caudal pouch organ about equally developed in both sexes and the dorsal portion of the pouch opening bordered by a series of 3 to 8 elongated scales, the two derived features that characterize the group. The two previously described species, D. speculiferum and D. terofali, are redescribed. Previous hypotheses of relationships among the diapomin genera Planaltina, Diapoma and Acrobrycon are discussed on the basis of preliminary morphological information. It is proposed that the Diapomini is a monophyletic group. An identification key, information on sexual dimorphism, gonad anatomy, reproductive mode and distribution of the species of Diapoma are provided.

Nitzschia papillosa (Bacillariaceae, Bacillariophyta): a new species from a Brazilian salt marsh

Phytotaxa ◽  
2016 ◽  
Vol 247 (1) ◽  
pp. 75 ◽  
Author(s):  
Lucielle Merlym Bertolli ◽  
Dávia Marciana Talgatti ◽  
Lezilda Carvalho Torgan
Keyword(s):  
Electron Microscopy ◽  
Scanning Electron Microscopy ◽  
New Species ◽  
Salt Marsh ◽  
First Record ◽  
Southern Brazil ◽  
Rio Grande Do Sul ◽  
Patos Lagoon ◽  
A New Species ◽  
Scanning Electron

A new species of the genus Nitzschia was found in epiphyton and microphytobenthos at the Patos Lagoon salt marsh (Rio Grande do Sul State, southern Brazil). Nitzschia papillosa sp. nov. was described under light and scanning electron microscopy and compared with other species from the section Lanceolatae. The species presents features shared by several species of the genus such as a linear-lanceolate outline, cuneate ends and irregularly distributed fibulae. The distinguishable feature is a row of dots on the margin opposite to the fibulae. In scanning electron microscopy, these structures appear as silica excrescences, little rounded or squared, which we refer as papillae, situated at the transapical costae in the internal valve face. This is the first record of this kind of ornamentation in Nitzschia species.

scholarly journals Pisces, Perciformes, Gobiidae, Ctenogobius stigmaticus (Poey, 1860): new species record at Patos Lagoon estuary, state of Rio Grande do Sul, Brazil

Check List ◽  
2010 ◽  
Vol 6 (1) ◽  
pp. 056 ◽  
Author(s):  
Marcelo Dias de Mattos Burns ◽  
Alexandre Miranda Garcia ◽  
João Paes Vieira
Keyword(s):  
New Species ◽  
Present Note ◽  
Rio Grande ◽  
Southern Brazil ◽  
Rio Grande Do Sul ◽  
Patos Lagoon ◽  
Gobiid Fish ◽  
Patos Lagoon Estuary ◽  
First Time

The present note records for the first time the gobiid fish Ctenogobius stigmaticus (Poey, 1860) at Patos Lagoon stuary, state of Rio Grande do Sul, southern Brazil. The known distribution of this species is therefore extended 600 km southwards.

Two new species of Hyalella (Crustacea, Amphipoda, Hyalellidae) from state of Rio Grande do Sul, Southern Brazil

Zootaxa ◽  
2017 ◽  
Vol 4337 (2) ◽  
pp. 263 ◽  
Author(s):  
MORGANA TAIS STRECK ◽  
GIOVANNA MONTICELLI CARDOSO ◽  
STELLA GOMES RODRIGUES ◽  
DANIEL ANGELO SGANZERLA GRAICHEN ◽  
DANIELA DA SILVA CASTIGLIONI
Keyword(s):  
New Species ◽  
Rio Grande ◽  
The State ◽  
Southern Brazil ◽  
Rio Grande Do Sul ◽  
Artificial Pond ◽  
Two New Species ◽  
Northwest Region

There are 68 known species of Hyalella worldwide, with 23 occurring in Brazil. The state of Rio Grande do Sul, Southern Brazil, has the largest diversity of the genus in the country, with nine species recorded. The current study aimed to describe two new species of Hyalella from state of Rio Grande do Sul, both of them in the Northwest region of the state, one found in a small spring and another in an artificial pond. Hyalella georginae n. sp. presents several clusters of simple setae on antenna 2, maxilliped very slender, gnathopod 2 dactylus not reaching the lobe of propodus, pleopods rami with short plumose setae and a peculiar pattern of setae on uropods and telson. Hyalella gauchensis n. sp. presents antenna 2 with few setae, maxilliped very slender, gnathopod 2 dactylus reaching the lobe of propodus and pleopods rami with long plumose setae. From this work, the number of Hyalella species found in Brazil increases to 25 and 70 for the genus. 

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