New species of Cetopsidium (Siluriformes: Cetopsidae: Cetopsinae) from the upper rio Branco system in Guyana

Abstract

Cetopsidium soniae, new species, is described from the Takutu River basin of southwestern Guyana, within the upper portions of the rio Branco of the Amazon basin. The new species differs from its congeners in details of pigmentation, the length of the pelvic fin, the form of the first rays of the dorsal and pectoral fins in mature males, the relative alignment of the dorsal and ventral profiles of the postdorsal portion of the body, the position of the anus, and the depth of the body. DNA barcodes were generated for the holotype and paratype. An examination of other samples of Cetopsidium from the rio Branco system extends the range of C. pemon into the Ireng River system of Guyana.Cetopsidium soniae, espécie nova, é descrita da bacia do rio Takutu, sudoeste da Guiana, na porção superior do rio Branco, bacia Amazônica. A nova espécie difere das demais espécies do gênero em detalhes de pigmentação, pelo comprimento da nadadeira pélvica, na forma dos primeiros raios das nadadeiras dorsal e peitoral em machos maduros, no relativo alinhamento dos perfis dorsal e ventral da região pós-dorsal do corpo, na posição do ânus, e na altura do corpo. Códigos de barra de DNA foram gerados para o holótipo e parátipo. O exame de outras amostras de Cetopsidium do sistema do rio Branco estende a distribuição de C. pemon até o sistema do rio Ireng na Guiana.

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

“…The PCR amplifications of partial 12S , 16S and Fish Reticulon‐4 ( F‐RTN4 ) for the phylogeny, as well as the 648 bp region of the cytochrome c oxidase I ( COI ) mitochondrial gene required for DNA barcodes, were carried out using the Taq PCR Core Kit (Qiagen). The methodology for PCR amplifications followed Covain et al (2008) for 12S and 16S , Chiachio et al (2008) for F‐RTN4 and Vari & Ferraris (2009) for COI . Polymerase chain reaction products were purified with the High Pure PCR Product Purification Kit (Roche; http://www.roche.com).…”

Cetopsis varii, a new species of whale catfish (Siluriformes: Cetopsidae) from the Meta Basin, Colombia

“…(), de Pinna et al . (), Vari and Ferraris (), and for his inspiring role as a model of scientific and personal integrity to new generations of ichthyologists.…”