| new species of cacatuocotyle (monogenoidea, dactylogyridae) parasitizing the anus and the gill lamellae of astyanax aeneus (pisces, ostariophysi: characidae) from the rio lacantún basin in the biosphere reserve of montes azules, chiapas, mexico. | as part of a biological inventory of the rio lacantún basin in the biosphere reserve of montes azules from chiapas state (southeastern, mexico), the following monogenoid ectoparasites infecting the external surface of the anal opening and the gill lamellae of the freshwater fish astyanax aeneus (characidae) in ten streams were found: cacatuocotyle chajuli sp. nov. (anus), cacatuocotyle exiguum sp. nov., and cacatuocotyle sp. (gill lamellae). c. chajuli is differentiated from its single congener, ... | 2013 | 23052760 |