Ostrincola breviseti n. sp., a copepod parasite of an oyster from Penang, Malaysia

A new species of poecilostomatoid copepod, Ostrincola breviseti, is described from the mantle cavity of the oyster, Saccostrea cucullata (Born), collected at Penang, Malaysia. The new species is distinguished by the short terminal setae on leg 5. The species of Ostrincola are discussed in terms of the relationships between the pattern of morphology and geographical distribution.