scholarly journals A new species of Characithecium (Monogenea: Dactylogyridae) from external surface and gills of two species of Astyanax (Ostariophysi: Characidae) in southern Brazil

2016 ◽  
Vol 87 (3) ◽  
pp. 903-907 ◽  
Author(s):  
Moisés Gallas ◽  
Cláudia Calegaro-Marques ◽  
Suzana B. Amato
Keyword(s):  
New Species ◽  
External Surface ◽  
Southern Brazil ◽  
A New Species

scholarly journals The marine epilithic diatom Melosira brandinii sp. nov. (Bacillariophyta) from Elephant Island, Antarctic Peninsula, with comments on some related species

2001 ◽  
Vol 49 (1-2) ◽  
pp. 01-12
Author(s):  
Luciano F. Fernandes ◽  
Roseli M. de Souza-Mosimann
Keyword(s):  
New Species ◽  
Antarctic Peninsula ◽  
Related Species ◽  
Barents Sea ◽  
External Surface ◽  
Southern Brazil ◽  
Mantle Edge ◽  
Epilithic Diatom ◽  
A New Species ◽  
Elephant Island

A new species of epilithic diatom is described from samples collected near Elephant Island, Antarctic Peninsula. The cells of Melosira brandinii sp. nov. are joined in filamentous chains and attached by means of long mucilaginous stalks. The valves are circular with the valvar surface composed of irregularly arranged pentagonal Ioculi. Each loculus bears 6-12 pores on the external surface, opening to the innerside through rotae. The corona is only composed of coarse granules. A mantle is well developed, presenting rimoportulae and bearing coarse granules, which are more concentrated at the mantle edge. Comparisons with the related species Melosira arctica, M. moniliformis and M. nummuloides are made. Additionally, photomicrographs of M. arctica from the type material and Barents Sea, and of M. moniliformis from estuaries of Southern Brazil are included.

A new species of Cacatuocotyle (Monogenea, Dactylogyridae) parasitizing two species of Astyanax (Ostariophysi, Characidae) in southern Brazil

2014 ◽  
Vol 59 (4) ◽  
Author(s):  
Moisés Gallas ◽  
Cláudia Calegaro-Marques ◽  
Suzana Amato
Keyword(s):  
New Species ◽  
Posterior Margin ◽  
External Surface ◽  
Accessory Piece ◽  
Rio Grande ◽  
The State ◽  
Southern Brazil ◽  
Rio Grande Do Sul ◽  
New Host ◽  
A New Species

AbstractA new species of Cacatuocotyle is described from the external surface of Astyanax aff. fasciatus and Astyanax jacuhiensis from Lake Guaíba, State of Rio Grande do Sul, Brazil. It differs from the other three species of the genus, recorded from Mexico and the State of Paraná, Brazil, by possessing an accessory piece with a long proximal portion, a U-shaped bar with irregular posterior margin in its midportion, and a haptor containing two circular thickenings with muscular anterior margins. Only one monogenean species, Urocleidoides astyanacis (= Characithecium costaricensis) was recorded for the host Astyanax aff. fasciatus, whereas none were known for A. jacuhiensis. This paper records a new host (A. jacuhiensis) for monogeneans in southern Brazil and extends southward with the geographical distribution of the genus Cacatuocotyle to the State of Rio Grande do Sul, Brazil.

Prosopanche cocuccii (Hydnoraceae): a new species from Southern Brazil

Phytotaxa ◽  
2021 ◽  
Vol 521 (3) ◽  
pp. 177-192
Author(s):  
JORDANO D. TAVARES DE CARVALHO ◽  
CATARINE MARKUS ◽  
ALDO MEROTTO JUNIOR ◽  
RENATO A. ZÁCHIA ◽  
MARILIA SCHUCH ◽  
...  
Keyword(s):  
New Species ◽  
Nicotiana Tabacum ◽  
Host Plant ◽  
Morphological Characteristics ◽  
Southern Brazil ◽  
Habitat Ecology ◽  
Single Host ◽  
Flower Organs ◽  
General Size ◽  
A New Species

Prosopanche cocuccii is described as a new species from Southern Brazil. It resembles P. bonacinae due to the trigonous rhizome and by the general size of the flower organs. Nevertheless, P. cocuccii is distinguished by the main floral morphological characteristics used to differentiate species. In addition, the new species presents some rare characters for the genus, such as a highly branched rhizome and flowers usually grouped in fascicles. We provide a description, illustrations, field photographs, morphological details under the stereomicroscope, and comments on habitat, ecology, distribution, and conservation of the new species, as well as an updated key for the genus Prosopanche. In addition, we identified that P. cocuccii produces a large number of rhizomes and fruits for each single host specimen of tobacco (Nicotiana tabacum), which resulted in a decrease in height and growth of its only known host plant.

Novelties in Persicaria (Polygonaceae): description of a narrowly endemic new species from southern Brazil, and typification of the name Polygonum minus

Phytotaxa ◽  
2021 ◽  
Vol 490 (1) ◽  
pp. 60-70
Author(s):  
LUÍS A. FUNEZ ◽  
GUSTAVO HASSEMER
Keyword(s):  
New Species ◽  
Morphological Description ◽  
Southern Brazil ◽  
Distribution Map ◽  
Morphological Comparison ◽  
Polygonum Minus ◽  
Narrow Area ◽  
Eurasian Species ◽  
A New Species ◽  
Locus Classicus

A new species of Persicaria, P. humboldtiana, endemic to a narrow area of waterfalls in Corupá, southern Brazil, is described in the present paper. The locus classicus of the new species is well-known for plant endemisms. A complete morphological description, original pictures, a distribution map, and a morphological comparison with the similar Eurasian species P. minor (≡ Polygonum minus) are given. The name Polygonum minus is lecto- and epitypified on, respectively, a Morison’s illustration and a specimen preserved at BM.

Valeriana iganciana (Valerianaceae), a new species from the highland grasslands of Serra do Tabuleiro, Santa Catarina, Brazil

Phytotaxa ◽  
2018 ◽  
Vol 364 (3) ◽  
pp. 275
Author(s):  
CASSIO RABUSKE DA SILVA ◽  
JOSIMAR KÜLKAMP
Keyword(s):  
New Species ◽  
Endemic Species ◽  
Southern Brazil ◽  
Santa Catarina ◽  
Entire Margin ◽  
A New Species ◽  
Santa Catarina State

Valeriana iganciana, an endemic species from the Serra do Tabuleiro highlands of Santa Catarina state, southern Brazil, is described and illustrated. The new species shares morphological affinities with V. ulei, from which it is distinguished mainly by leaves with entire margin, by the cymose architecture of the inflorescence and by the triquetrous and elliptical fruits with annular to dentate calyx.

scholarly journals A new Xenacanthiformes shark (Chondrichthyes, Elasmobranchii) from the Late Paleozoic Rio do Rasto Formation (Paraná Basin), Southern Brazil

2014 ◽  
Vol 86 (1) ◽  
pp. 135-145 ◽  
Author(s):  
VICTOR E. PAULIV ◽  
ELISEU V. DIAS ◽  
FERNANDO A. SEDOR ◽  
ANA MARIA RIBEIRO
Keyword(s):  
New Species ◽  
Longitudinal Section ◽  
Optical Microscope ◽  
Late Paleozoic ◽  
Southern Brazil ◽  
Fossil Assemblage ◽  
Transversal Section ◽  
Paraná Basin ◽  
Parana Basin ◽  
A New Species

The Brazilian records on Xenacanthiformes include teeth and cephalic spines from the Parnaíba, Amazonas and Paraná basins. This work describes a new species of Xenacanthidae, collected in an outcrop of Serrinha Member of Rio do Rasto Formation (Wordian to Wuchiapingian), Paraná Basin, municipality of Jacarezinho, State of Paraná. The teeth of the new species are two or three-cuspidated and the aboral surface show a smooth concavity and one rounded basal tubercle. The coronal surface presents one semi-spherical and subcircular coronal button, and also two lateral main cusps and one central (when present) with less than one fifth of the size of the lateral cusps in the labial portion. The lateral cusps are asymmetric or symmetric, rounded in transversal section, lanceolate in longitudinal section, devoid of lateral carinae and lateral serrations, and with few smooth cristae of enameloid. In optical microscope the teeth show a trabecular dentine (osteodentine) base, while the cusps are composed by orthodentine, and the pulp cavities are non-obliterated by trabecular dentine. The fossil assemblage in the same stratigraphical level and in the whole Rio do Rasto Formation indicates another freshwater record for xenacanthid sharks.

Sinningia lutea (Gesneriaceae), a new species from Southern Brazil

Brittonia ◽  
2012 ◽  
Vol 64 (2) ◽  
pp. 108-113 ◽  
Author(s):  
Cristiano Roberto Buzatto ◽  
Rodrigo B. Singer
Keyword(s):  
New Species ◽  
Southern Brazil ◽  
A New Species

scholarly journals Triceratium moreirae sp. nov. and Triceratium dubium (Triceratiaceae - Bacillariophyta) from estuarine environments of Southern Brazil, with comments on the genus Triceratium C. G. Ehrenberg

2001 ◽  
Vol 61 (1) ◽  
pp. 159-170 ◽  
Author(s):  
L. F. FERNANDES ◽  
R. M. de SOUZA-MOSIMANN
Keyword(s):  
New Species ◽  
Southern Brazil ◽  
Typical Pattern ◽  
Characteristic Morphology ◽  
A New Species ◽  
External Aperture

A new species of Triceratiaceae is described for estuarine environments of Southern Brazil. The valve of Triceratium moreirae sp. nov. is triangular with elevations bearing ocellus and a rimoportula in their basis. The valvar surface has robust pseudoloculi, circular to polygonal, each one confining a group of areolae arranged in a typical pattern. A central larger areola is surrounded by 5-8 smaller areolae, and they are poroidal with domed cribra. A septum emerges from the valvocopula, having the base reinforced by ribs and the margins folded to the innerside of the valve. The new species is compared to the closely related diatom Triceratium dubium, which has the same pattern of areolar disposition, formation of septum and pseudoloculi. The main diferences in relation to T. moreirae are: rimoportulae intercalated to ocelli and with a characteristic morphology (spinules on the edge of the external aperture), and more elongated elevations with a constriction. Some criteria used for the classification of categories into the Triceratiaceae are also discussed, and we propose that the type of areola (poroidal with cribra) be included in the circumscription of Triceratium.

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