A revision of Cycloplectanum Oliver, 1968 (Monogenea: Diplectanidae) and descriptions of C. hongkongensis n.sp. and C. lantauensis n.sp. from Epinephelus spp. (Serranidae) in the South China Sea

Abstract

An emended generic diagnosis for Cycloplectanum Oliver, 1968 (Monogenea: Diplectanidae) is provided which emphasizes the importance of the terminal genitalia (penis and vagina) in generic separation. Cycloplectanum americanum (Price, 1937) Oliver, 1968 is recognized as type species of Cycloplectanum. Cycloplectanum epinepheli (Yamaguti, 1938) n.comb., C. serrani (Yamaguti, 1953) n.comb., C. amplidiscatum (Bravo-Hollis, 1955) n.comb., C. latesi (Tripathi, 1955) n.comb., C. melanesiensis (Laird, 1958) n.comb., C. querni (Yamaguti, 1968) n.comb., C. cupatum (Young, 1969) n.comb., C. summanae (Young, 1969) n.comb., C. vagampullum (Young, 1969) n.comb., together with C. hongkongensis n.sp., C. lantauensis n.sp., and C. yamagutii nom.nov., are included in the genus. Cycloplectanum yamagutii nom.nov. is proposed for Pseudorhabdosynochus epinepheli which was named a synonym of C. americanum by G. Oliver in 1968.Based on material from Epinephelus spp. (Serranidae) taken in the South China Sea, redescriptions are presented for C. cupatum and C. vagampullum. In addition, C. hongkongensis n.sp. from E. brunneus and E. awoara and C. lantauensis n.sp. from E. brunneus and E. fario are proposed. The findings of C. cupatum and C. vagampullum on E. fario represent new host and geographic records.