Redescriptions of Mamaevs Two Digenean Trematodes Diploproctia drepanei (Lepocreadiidae) and Beluesca plectorhynchi (Cryptogonimidae)

Two digenean trematodes, Diploproctia drepanei (Lepocreadiidae) and Beluesca plec- torhynchi, formerly Pseudallacanthochasmus plectorhynchi (Cryptogonimidae) were described by Mamaev (1970) from the drepanid fish Drepane punctata and the haemulid fish Plectorhinchus cinctus, respectively, in the Gulf of Tonkin. This paper is given to supplement his description based on newly obtained material: Diploproctia drepanei from Drepane longimana of the Philip- pines and Beluesca plectorhynchi from Plectorhinchus gibbosus of Japan.