ALGUNOS TREMATODOS DE LAS RATAS DOMESTICAS DE LA CIUDAD DE MEXICO

Resumen

The author describes two new species of Trematoda found in the intestine of Rattus norvegicus, from the city of Mexico.
Euparyphium ochoterenai n. sp. is compared by means of a chart with E. malayanum, E. murinum and E. longitestis showing all the differences with these species.
Fibricola caballeroi n. sp. differs from the four species of this genus known so far in the length of the parasites; in having the forebody more wide than long; in having the holdfast organ considerably longer; in the absence of eosophagus and in the number and size of eggs in the uterus.