Abstract
The karyotype of Paragonimus westermani Filipinos was analysed by the air-drying method. The chromosome number of the fluke was n=11, 2n=22. The chromosomes were composed of one pair of large-sized metacentrics, four pairs of medium-sized subtelocentrics, three pairs of small-sized metacentrics or submetacentrics, and three pairs of small-sized submetacentrics or subtelocentrics. The karyotype of P. westermani filipinus mostly resembles those of the closely allied species such as P. westermani westermani and P. pulmonalis. General resemblance was also seen between these three species and the other congeneric species: P. ohirai, P. iloktsuennensis, P. miyazakii, P. sadoensis, and P. mexicanus (syn. P. peruvianus).
