A new species of Acestridium Haseman, 1911 (Loricariidae: Hypoptopomatinae) from the Eastern Amazon basin, Brazil

Abstract

Acestridium triplax, new species, is described from the Amazon River basin in Pará State, Brazil. The new species can be distinguished from all its congeners by having one series of middle abdominal plates between the lateral abdominal plates (vs no abdominal plates between the lateral abdominal plates).Acestridium triplax, nova espécie, é descrito do rio Amazonas, Estado do Pará, Brasil. A espécie nova pode ser distinta de todas as suas congêneres por possuir uma série de placas abdominais médias entre as placas abdominais laterais (vs sem placas abdominais médias entre as placas abdominais laterais).

Checklist of the ichthyofauna of the Rio Negro basin in the Brazilian Amazon

“…First, a compilation of the records of species originally described based on specimens collected in the Rio Negro basin or that included that basin in their distribution range was made based in the catalogues of Reis et al (2003), Buckup et al (2007), Ferraris-Jr (2007), and Ferraris-Jr et al (2017). Additional information from taxonomic revisions and species descriptions from 2003 to 2019 were also included: Armbruster (2003), Britto and Lima (2003), Costa (2003a, 2003b), Vari and Lima (2003), Costa (2004a, 2004b), Crampton et al (2004), Hrbek et al (2004), Lehmann and Reis (2004), Malabarba (2004), Zanata and Toledo-Piza (2004), Zarske et al (2004), Ferraris-Jr et al (2005), Kullander and Ferreira (2005), Lundberg and Akama (2005), Reis et al (2005), Sabaj (2005), Sousa and Rapp Py-Daniel (2005), Vari et al (2005), Zanata and Lima (2005), Armbruster and Page (2006), Bührnheim and Malabarba (2006), Ferreira and Lima (2006), Kullander and Ferreira (2006), Mautari and Menezes (2006), Mattox et al (2006), Menezes (2006), de Santana and Nogueira (2006), Zarske and Géry (2006), Parisi et al (2006), Lundberg and Cox-Fernandes (2007), Bührnheim and Malabarba (2007), Buitrago–Suárez and Burr (2007), Ferraris-Jr (2007), Lucena (2007), Rodriguez and Reis (2007), Staeck and Schindler (2007), Zarske and Géry (2007), Armbruster (2008), Birindelli et al (2008), Orti et al (2008), Sabaj and Birindelli (2008), Sabaj et al (2008), Sidlauskas and Vari (2008), Rapp Py-Daniel and Fichberg (2008), Rocha et al (2008a, 2008b), Thomas and Rapp Py-Daniel (2008), Birindelli and Britski (2009), de Santana and Vari (2009), Lima and Sousa (2009), Lima et al (2009), Marinho (2009), Marinho and Lima (2009), Oyakawa and Mattox (2009), Paixão and Toledo-Piza (2009), Sul...…”

Phylogenetic relationships of the species of Acestridium Haseman, 1911 (Siluriformes: Loricariidae)

“…In addition to the nuchal plate, the species of Acestridium and Niobichthys possess additional unpaired middorsal plates with ventral keels that contact the neural spines of the anterior vertebral centra. Rodriguez & Reis (2007) termed these elements prenuchal plates. These are absent in almost all loricariids, including most outgroups in the present study (state 0).…”