| spot the difference: two cryptic species of gyrodactylus von nordmann, 1832 (platyhelminthes: monogenea) infecting astyanax aeneus (actinopterygii, characidae) in mexico. | over the course of one year, undescribed specimens of gyrodactylus were recovered from banded tetra, astyanax aeneus collected in the la antigua and nautla river basins in central veracruz, mexico. parasites were processed for morphometric and molecular analyses. morphometrically, gyrodactylus samples collected in the la antigua river had slightly smaller haptoral structures than those collected from the nautla river. during the 12month-collection of samples, however, water temperature varied co ... | 2016 | 27208885 |