Five new species of genus Astyanax Baird & Girard, 1854 from Rio Iguaçu, Paraná, Brazil (Ostariophysi, Characiformes, Characidae).
- BiologyBrazilian journal of biology = Revista brasleira de biologia
Five new species of the Neotropical characiform genus Astyanax Baird & Girard are described from Rio Iguaçu at the border of Paraná and Santa Catarina states, southeastern Brazil and Astyanax…
Systematics of the neotropical fish subfamily Glandulocaudinae (Teleostei: Characiformes: Characidae)
The systematics of the Glandulocaudinae is reviewed in detail and justification for the recognition of the group as a subfamily is discussed. The subfamily Glandulocaudinae consists of three genera:…
A new species of Chrysobrycon (Characiformes, Characidae, Stevardiinae) from the Amazon River basin in Colombia, with a new diagnostic characteristic for the genus.
- BiologyJournal of fish biology
In species of Chrysobrycon, the frontals are extensively contacting each other along the midline, resulting in an absent frontalfontanel and a reduced parietal fontanel, a condition rarely found within the Stevardiinae and hence is proposed as an additional diagnostic characteristic for the genus.
Redescription of Astyanax guianensis Eigenmann 1909 (Characiformes: Characidae), a poorly known and widespread fish from the Amazon, Orinoco and Guiana Shield drainages.
Astyanax guianensis is redescribed based on the holotype, paratypes, and additional specimens from the rio Essequibo in Guyana, rio Orinoco in Venezuela and from several localities in the Amazon…
A redescription of Astyanax gymnodontus (Eigenmann, 1911), new combination, a polymorphic characid fish from the rio Iguaçu basin, Brazil
Examination of a large number of specimens from the rio Iguacu basin that present dental and lip features that were intermediate between Psalidodon and Astyanax indicated that specimens attributed toPsalidodon show extreme characters observed within a polymorphic AstyanAX species.
New Species of Astyanax (Ostariophysi: Characiformes: Characidae) from the Upper Rio Paraná System, Brazil
Astyanax bockmanni differs from A. eigenmanniorum and all congeners in the combination of morphometric, meristic, and pigmentary features and details of oral dentition, and it is proposed that the species is a member of a clade within the Characidae that does not include Astyanax.
Highlighting Astyanax Species Diversity through DNA Barcoding
- BiologyPloS one
The results confirm the extreme complexity of the systematics of the genus Astyanax and show that DNA barcoding can be an useful tool to address these complexes questions.
Identification of the Oligocene to early Miocene loricariid catfish †Taubateia paraiba as a member of the Rhinelepinae
- Biology, Environmental ScienceJournal of Paleontology
Fossils that are available for a clade of interest and can be directly incorporated in the phylogenetic analysis are considered primary sources of time calibration, whereas calibrations inferred from other studies are secondary (Arroyave et al., 2013).
Seasonal feeding plasticity can facilitate coexistence of dominant omnivores in Neotropical streams
- Environmental ScienceReviews in Fish Biology and Fisheries
Substantial reduction in the isotopic niche of P. bifascistus and a shift toward aquatic invertebrates can facilitate coexistence during this season of resource shortage, which could be an important mechanism that contributes to the resource partitioning and coexistence of dominant omnivores in Neotropical streams.