Search

A new species of Phenacogaster is described from the rio Salitre, a tributary of the lower middle rio São Francisco drainage. The new species can be clearly distinguished from all its congeners in having a conspicuous, broad caudal peduncle spot reaching the upper and lower margins of the peduncle with a short extension onto the middle caudal fin rays and another weaker extension over the lower lobe of the caudal fin. RESUMO Uma nova espécie de Phenacogaster é descrita do rio Salitre, afluente da drenagem do submédio rio São Francisco. A nova espécie é facilmente distinguida de todas as congêneres por apresentar uma conspícua e larga mancha no pedúnculo caudal que alcança as margens superior e inferior do pedúnculo com uma curta extensão sobre os raios medianos e outra mais fraca sobre o lobo inferior da nadadeira caudal.

A new species of Astyanax belonging to the Astyanax scabripinnis complex is described from dos Touros River, tributary of the Pelotas River, Uruguay River basin. Astyanax taurorum sp. nov. is distinguished from other species of the Astyanax scabripinnis species complex by having two humeral spots, the first vertically elongated; teeth of inner row of premaxilla with three to five cusps; 2-3 (modes 2 or 3) maxillary teeth; 20-23 (mode 22) branched anal-fin rays; 13-15 (mode 14) gill rakers on lower branch of the first branchial arch; 20-23 (mode 21) total gill rakers in first branchial arch; 33-36 (mode 35) perforated lateral line scales. Astyanax taurorum sp. nov. is similar to Astyanax paris; nevertheless, it can be readily distinguished from it by having a smaller head depth (73.6-83.1% vs. 86.4-95.6%) and smaller interorbital width (24.1-28.0% vs. 30.8-32.8%). In addition, it differs from A. paris by the presence a posttemporal hook-shaped posterodorsal margin.

LUCENA, Z. M. S. de. Coleção de moluscos do Museu de Ciências e Tecnologia da PUCRS - breve relato. Arquivos de Ciências do Mar, Fortaleza, v. 49, Supl., p. 37-39, dez. 2016. The mollusks collection at the PUCRS Museum of Science and Technology has representatives of the classes Gastropoda, Bivalvia, Cephalopoda, Polyplacophora and Scaphopoda, mostly from the South of Brazil. The first two classes are the most heavily represented, comprising 96% of the catalogued lots. The collection comprises 10,650 lots and 164,674 specimens, and includes endemic, invasive and endangered species. An overview of the collection composition will be given. A coleção de Moluscos do Museu de Ciências e Tecnologia da PUCRS possui representantes das Classes Gastropoda, Bivalvia, Cephalopoda, Polyplacophora e Scaphopoda, a maior parte proveniente do sul do Brasil. As duas primeiras classes são as mais representativas, com 96% do total. A coleção possui 10.650 lotes tombados e 164.674 espécimes, com representantes de espécies endêmicas, invasoras e ameaçadas de extinção. Neste artigo apresentam-se informações gerais sobre a composição do acervo.

Bryconamericus turiuba, new species, is described from the upper Rio Parana system in Brazil. It differs from all congeners in the following combination of characters: 15– 20 branched anal-fin rays; four or five scales in a transverse series from the dorsal-fin origin to the lateral line; shallow body (depth 23.6–30.6% of SL); 37–43 perforated lateral line scales; first, third, and fifth or, more rarely, first and fourth outer premaxillary tricuspid teeth projecting anteriorly; two to five tricuspid to pentacuspid maxillary teeth; dentary with three or four tricuspid or pentacuspid large teeth, followed by five to seven smaller conical to tricuspid teeth; a conspicuous dark, vertically elongate humeral spot, extending to below the lateral line; a dark dorsal stripe extending from the supraoccipital spine to the caudal peduncle with a gap at the adipose-fin base; caudal-fin lobes without conspicuous markings, uniformly pigmented along rays; mature males lacking hooks on the pelvic- and anal-fin ra...

Phenacogaster apletostigma sp. nov. distingue-se por apresentar uma grande mancha umeral verticalmente alongada que se estende desde a linha lateral até quase o dorso do corpo e apresenta um prolongamento na porção ântero-dorsal. Tanto a forma quanto o tamanho da mancha não são encontrados em nenhuma outra espécie do gênero e é aqui considerada uma autapomorfia da espécie. Habita o sistema do rio Araguari, no Estado do Amapá, Brasil. Phenacogaster apletostigma sp. nov. is distinguished from all other species of the genus by the presence of a large and vertically elongate humeral blotch, extending from the lateral line to near the dorsum. Anterodorsal portion of humeral blotch with an anterior extension. The unique shape and size of the humeral blotch, not found in the remaining Phenacogaster species, is considered an autapomorphy of the new species. It is known from the River Araguari basin, Amapá State, Brazil.

Deuterodon pedri was briefly described in 1908 by Carl Eigenmann on the basis of seven specimens of 73–100 mm standard length (SL), all "in very poor condition" according to the author. In the original description, Eigenmann did not mention the location where the specimens were captured, even though the publication presented results of the Thayer expedition to Brazil (Eigenmann 1908: 93).

Sicydium punctatum, previously known from Panamá, Caribbean islands, and coastal drainages of Venezuela, has a distribution that extends up to coastal drainages of Bahia state, Brazil. The genus Sicydium is formally recorded for Brazilian freshwaters. Comparisons are made between S. punctatum and other species of the genus based on data from the literature and presented here.