Schistosoma ovuncatum is a schistosome parasite, first described in 2002. Its recognition as a new species only occurred when zoologists were re-examining specimens originally described in 1984.
The species was described from material collected in Chiang Mai Province, northwest Thailand. The name is derived from the shape of the egg (ovum = egg + uncatus hooked). The natural final host is the rat (Rattus rattus) and the intermediate host is the pomatiopsid snail Tricula bollingi.