A new species belonging to the Hoplias malabaricus complex from the Amazon basin,
Brazil, is described. The new species is characterized by 15–16 predorsal scales, 37–39 …

The bighead carps of the genus Hypophthalmichthys (H. molitrix and H. nobilis) are
important aquaculture species. They were subjected to extensive multidisciplinary research …

Ancistrus is a highly diverse neotropical fish genus that exhibits extensive chromosomal
variability, encompassing karyotypic morphology, diploid chromosome number (2n= 34–54) …

Rhamdia quelen, a Neotropical fish with hybridization between highly divergent
mitochondrial DNA (mtDNA) lineages, represents an interesting evolutionary model …

Four of the 7 species of Rhamdia present in Mexico stand out for being microendemic and
also troglobitic, that is, for being restricted to their type-locality caves and for exhibiting a …

Markiana nigripinnis is a small fish that inhabits preferentially floodplains, being common in
the Amazon basin and in the Brazilian Pantanal. This species has a complex taxonomic …

The wide distribution of the Neotropical freshwater catfish Rhamdia offers an excellent
opportunity to investigate the historical processes responsible for modeling South America's …

Anadoras is a thorny catfish genus widespread through the Amazon and Paraguay river
basins. It includes 2 nominal species, A. grypus and A. weddellii, plus Anadoras …

Trachelyopterus is a Neotropical catfish genus with a controversial taxonomic history due to
the morphological similarity among species. Cytogenetically, only classic techniques …

Small nuclear RNA (snRNA) is a class of molecules involved in the processing of pre-mRNA
and in regulatory cell processes. snRNAs are always associated with a set of specific …