Revision of the genus Macropsobrycon Eigenmann, 1915 (Characidae: Cheirodontinae: Compsurini)

Abstract

The cheirodontine genus Macropsobrycon is redefined and considered monotypic. The type species, M. uruguayanae, is redescribed based on samples from the entire known geographical distribution of the species. Sexually dimorphic characters of M. uruguayanae are further described and the relationships of the species with the remaining Compsurini are discussed. O gênero Macropsobrycon de Cheirodontinae é redefinido e considerado monotípico. A espécie-tipo, M. uruguayanae, é redescrita com base em amostras de toda a distribuição geográfica conhecida da espécie. Caracteres de dimorfismo sexual secundário de M. uruguayanae são descritos e as relações da espécie com outros Compsurini são discutidas.

Gill‐derived glands in species of Astyanax (Teleostei: Characidae)

“…; Bührnheim and Malabarba , ; Mirande , ; Azevedo et al . ; Jerep and Malabarba ; Oliveira et al . ).…”

Development of secondary sexual characters and their relationship to ontogeny and seasonal reproductive period in Hyphessobrycon igneus (Ostariophysi: Characiformes)

“…Additional male behaviours and morphological characters, such as courtship displays and fin colour and shape, also appear to play a role in mate choice in many fishes (Forsgren et al ., ), with fin variation being commonly observed in various fish groups (Py Daniel & Cox‐Fernandes, ). The differences in male and female anal‐fin shape observed herein is often used as a character in the study of Characidae systematics (Miquelarena & Aquino, ; Canan & Gurgel, ; Miquelarena & Aquino, ; Bertaco & Lucinda, ; Carvalho, ; Carvalho & Bertaco, ; Matheus, ; Bertaco et al, ; Carvalho et al, ; Lucena & Malabarba, ; Carvalho, ; Jerep & Malabarba, ). Nevertheless, there can be intrageneric variation in this pattern; for example, anal‐fin shape is similar in males and females of H. togoi (Oyakawa et al, ) and Hyphessobrycon nicolasi Miquelarena & López, (Miquelarena & López, ).…”

“…Fishes can also show sexual dimorphism in the shape of caudal, pelvic, pectoral and anal fins (Py Daniel & Cox-Fernandes, 2005). Sex differences in fin shape, size and coloration have been reported for many species of Characidae (Miquelarena & Aquino, 1995;Canan & Gurgel, 1997;Miquelarena & Aquino, 1999;Bertaco & Lucinda, 2005;Carvalho, 2006;Carvalho & Bertaco, 2006;Matheus, 2006;Miquelarena & López, 2006;Oyakawa et al, 2006;Bertaco et al, 2007;Alcaraz et al, 2009;Menezes & Weitzman, 2009;Zanata & Camelier, 2009;Carvalho et al, 2010;Lucena & Malabarba, 2010;Miquelarena & López, 2010;Zanata & Camelier, 2010;Jerep & Malabarba, 2011;Camelier & Zanata, 2014). The development of bony hooks on fin rays (Fig.…”

A new species of Odontostilbe cope (Characiformes: Cheirodontinae) from rio Madeira basin diagnosed based on morphological and molecular data

“…(2020) list 65 species valid for Cheirodontinae. Malabarba (1998), Jerep and Malabarba (2011) and Jerep et al . (2017), however, considered ‘ Cheirodon ’ luelingi Géry and ‘ Cheirodon ’ ortegai Vari & Géry from the Ucayali basin, and ‘ Macropsobrycon ’ xinguensis Géry from the Xingu basin as species that lack diagnostic characters of Cheirodontinae, Cheirodon or Macropsobrycon and should therefore be assigned to other characid groups.…”

“…The family Characidae, with 635 valid species from the rio Madeira, represents 49% of the species registered for the Amazon basin (Dagosta & de Pinna, 2019); 13 species of Cheirodontinae have been recorded from the rio Madeira (Lima et al, 2013). Fricke et al (2020) list 65 species valid for Cheirodontinae. Malabarba (1998), Jerep and Malabarba (2011) and Jerep et al (2017), however, considered 'Cheirodon' luelingi Géry and 'Cheirodon' ortegai…”