Se fotografiaron especímenes recolectados hace más de 46 años en El Salvador, que se encuentran la colección peces dulceacuícolas del Museo Field Chicago, EUA; para estudiar sus condiciones y comparar su distribución geográfica con información actual. Los datos sobre las familias Ariidae Atherinidae, después 45 indican ocurren actualmente los sitios recolecta originales. Lo mismo observó captur...

Despite their ecological and economical importance, fishes of the family Ariidae are still genetically and cytogenetically poorly studied. Among the 133 known species of ariids, only eight have been karyotyped. Cytogenetic analyses performed on Genidens barbus and Sciades herzbergii revealed that both species have 2n = 56 chromosomes and Cathorops aff. mapale has 2n = 52 chromosomes: Genidens b...

The cephalic and pectoral girdle structures of the Chinese catfish Cranoglanis bouderius are described and compared with those of other catfishes as the foundation for an analysis on the Cranoglanididae autapomorphies and also for a discussion on the phylogenetic relationships between the cranoglanidids and the other catfishes. Our observations and comparisons indicate that cranoglanidids are d...

The muscles of the cephalic region and pectoral girdle of Arius heudeloti, Genidens genidens andBagre marinus are described and compared with those of non-ariid siluriforms. Our observations and compar-isons revealed that, although the configuration of the cephalic and pectoral girdle musculature of these ariidspecies is basically similar to that of other catfishes, these species pr...