Rineloricaria osvaldoi (Siluriformes: Loricariidae): a new species of armored catfish from rio Vermelho, Araguaia basin, Brazil

Abstract

A new species of Rineloricaria Bleeker from the rio Vermelho, Araguaia basin, Goiás, Brazil is described. Rineloricaria osvaldoi, new species, can be distinguished from its congeners by the combination of the following characters: surface of thoracic area trapezoidal with greatest width between pectoral fins, up to 13 premaxillary teeth, largest body width at the section of the canal plate, anterior profile of the head of mature males semicircular in dorsal view. Although eight genera of Loricariinae are known from the rio Araguaia basin, R. lanceolata was only species of Rineloricaria previously reported from that basin. Therefore, the discovery of the R. osvaldoi increases the scenery of diversity of Loricariinae within this drainage basin.Uma nova espécie de Rineloricaria Bleeker, proveniente do rio Vermelho, bacia do Araguaia, Goiás, Brasil, é descrita. Rineloricaria osvaldoi, espécie nova, distingue-se de suas congêneres pelos seguintes caracteres: superfície da região torácica trapezoidal com maior largura entre as nadadeiras peitorais, máximo de 13 dentes pré-maxilares, maior largura do corpo na seção da placa protadora de canal, perfil anterior da cabeça semicircular, em vista dorsal, em machos sexualmente maduros. A despeito de serem conhecidos oito gêneros de Loricariinae para a bacia do rio Araguaia, somente uma espécie de Rineloricaria era formalmente registradas para esta bacia, R. lanceolata. Deste modo, a descoberta de R. osvaldoi enriquece o cenário da diversidade de Loricariinae para esta bacia de drenagem.

Gross brain morphology of the armoured catfish Rineloricaria heteroptera, Isbrücker and Nijssen (1976), (Siluriformes: Loricariidae: Loricariinae): A descriptive and quantitative approach

“…Rineloricaria heteroptera , Isbrucker and Nijssen (1976), (Figure ) is a medium‐sized loricariid, approximately 133 mm in standard length (SL; distance from the tip of the snout on the upper jaw to the midlateral posterior edge of the hypural plate), restricted to the upper medium portion of the Amazon River basin, near Manaos (state of Amazonas), Brazil (Ferraris, ; Froese & Pauly ), and inhabiting mainly small sandy bottom forest streams (Py‐Daniel & Fichberg, ). As for most members of the genus, R. heteroptera shows a remarkable external sexual dimorphism and benthic and diurnal habits (Abelha, Agostinho, & Goulart, ; Delariva & Agostinho, ; Fichberg & Chamon, ; Isbrücker & Nijssen, ; Lacerda, ; Reis & Cardoso ). The genus Rineloricaria Bleeker, 1862, sensu Covain and Fisch‐Muller (), with approximately 63 valid species (Froese & Pauly, ), is the most specious genus within the Loricariinae and also shows the largest distribution within the family (from Costa Rica to Argentina), found in a diverse array of environments (Covain & Fisch‐Muller, 2007; Froese & Pauly, ).…”

Intergeneric phylogenetic relationships in catfishes of the Loricariinae (Siluriformes: Loricariidae), with the description of Fonchiiloricaria nanodon: a new genus and species from Peru

“…Within the Loricariidae, members of the subfamily Loricariinae are united by a long and depressed caudal peduncle and by the absence of an adipose fin, but they exhibit substantial variation in body shape, lip morphology and dentition. There are currently 220 valid species of Loricariinae, distributed in 30 genera (Covain & Fisch‐Muller, 2007; Fichberg & Chamon, 2008; Ghazzi, 2008; Ingenito et al , 2008; Rapp Py‐Daniel & Fichberg, 2008; Rodriguez & Miquelarena, 2008; Rodriguez & Reis, 2008; Rodriguez et al , 2008; Thomas & Rapp Py‐Daniel, 2008; de Carvalho Paixão & Toledo‐Piza, 2009; Thomas & Sabaj Pérez, 2010).…”

A new species of rheophilic armored catfish of Rineloricaria (Siluriformes: Loricariidae) from the Vaupés River, Amazonas basin, Colombia

“…lanceolata , R . malabarbai Rodriguez & Reis, 2008, Rineloricaria microlepidogaster [Regan 1904], and Rineloricaria osvaldoi Fichberg & Chamon, 2008); and naked portion on the cleithral region from border of lower lip reaching origin of pectoral fin (vs. naked portion of cleithral region not reaching origin of pectoral fin, beyond pectoral‐fin origin, or portion totally covered by plates). Rineloricaria cachivera n. sp.…”

“…The armored catfish Rineloricaria Bleeker, 1862, has 71 valid species, being the richest genus in the family Loricariidae (Fricke et al, 2023). The genus is diagnosed by a combination of characteristics such as the presence of postorbital notch; lower lip with short round papillae; premaxilla with 7 to 15 teeth on each ramus; dentary teeth strong, deeply bicuspidate, and larger than premaxillary; colouration of the dorsal region with dark‐brown bars or blotches; abdomen with a conspicuous polygonal pre‐anal plate, usually bordered by three other large trapezoidal plates (Fichberg & Chamon, 2008) and some features of sexual dimorphism, which are traits not always present in the individuals available for examination (Londoño‐Burbano & Urbano‐Bonilla, 2018). Progress has been made in the taxonomic and phylogenetic relationships between Rineloricaria species (Covain & Fisch‐Muller, 2007), and it is now demonstrated to be a monophyletic group based on molecular data (Costa‐Silva et al, 2015; Covain et al, 2016) with wide interspecies morphological variation (e.g., body color and shape, arrangement of abdominal plates, shape of head, and distribution of hypertrophied odontodes; Vera‐Alcaraz et al, 2012).…”