Neopolystoma liewi sp n. (Monogenea : Polystomatidae) from the eye of the Malayan box turtle (Cuora amboinensis)

Neopolystoma liewi sp. n. is described from the conjunctival cavity of the Malayan box turtle Cuora amboinensis (Daudin, 1802), in Peninsular Malaysia . This is the first record of Neopolystoma in Malaysia and the fourth polys tomatid species described from C. amboinensis. Of the 27 Malayan box turtle s examined, 8 were found to be infected. A maximum of 2 parasites per eye a nd 4 individuals per host was recorded. N. liewi sp. n. differs From all ot her members of the genus by possessing few and short genital spines and sma ll marginal hooks. The oncomiracidium has 64 ciliated cells arranged symmet rically about the sagittal axis.