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The Gerreidae family (mojarras or silver biddies) is one of the most representative groups of fish in aquatic systems in tropical and subtropical areas. Although the neotropical genera: Diapterus, Eucinostomus, Eugerres and Gerres, have been the subject of studies on their systematics, although there are still problems of taxonomic and phylogenetic nature due to the absence of morphological diagnostic characters in several species, which makes its identification difficult. The aim is to determine the taxonomic and phylogenetic utility of body morphology in selected species of Gerreidae. A geometric morphometric analysis was carried out. The Multivariate Analysis of Variance detected significant differences in all morphological comparisons (P <0.001). These results indicate that fish shape allows distinguishing species: Diapterus auratus, D. brevirostris, Eucinostomus dowii, E. argenteus, Gerres cinereus (sl G. simillimus) Atlantic and Pacific Gerres cinereus. The average configuration of body morphology for each species was phylogenetically analyzed with maximum parsimony using TNT 1.1 software, which is phylogenetically informative given that the tree derived from this analysis is consistent with previous results from osteological, meristic, morphological, and molecular character analyses. These results suggest that body shape is a character of taxonomic and phylogenetic utility in the group of Gerreidae.[br]

Palabras clave: taxonomic nature; phylogenetic nature; morphological comparisons

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