An updated concept and revised composition for Hamacreadium Linton, 1910 (Opecoelidae: Plagioporinae) clarifies a previously obscured pattern of host-specificity among species Martin, Storm B. Cutmore, Scott C. Ward, Selina Cribb, Thomas H. Zootaxa 2017 4254 2 151 187 PBCZ (Siddiqi & Cable, 1960) Durio & Manter, 1968 (Siddiqi & Cable, 1960) Durio & Manter 1968 [151,1012,644,670] Trematoda Opecoelidae Cainocreadium Animalia Plagiorchiida 21 172 Platyhelminthes species lintoni   Records.From the Nassau grouper,  Epinephelus striatus(Bloch), and the coney,  Cephalopholis fulva(Linnaeus)[as  C. fulvus(Linnaeus)] ( Serranidae) off Puerto Ricoby Siddiqi & Cable (1960). From  E. striatusoff Puerto Ricoby Dyer et al. (1985). From the graysby,  Cephalopholis cruentata(Lacépède)[as  Epinephelus cruentatus(Lacépède)],  E. striatusand  Haemulon sciurusoff Puerto Ricoby Dyer et al. (1992). From the red grouper,  Epinephelus morio(Valenciennes)off St. Thomas, U.S. Virgin Islandsby Andres et al. (2014).   Remarks.This species was described based on three specimens. The genital pore is medial and the excretory vesicle extends to the intestinal bifurcation. The combination proposed by Durio & Manter (1968)has been recognised by subsequent authors ( Dyer et al. 1985; Bray & Cribb 1989) and supported with molecular analyses ( Andres et al. 2014). In their review of the parasite fauna of  Lutjanus griseus, Argáez-García et al. (2010)cite reports of  C. lintoniin that fish by Siddiqi & Cable (1960)and Dyer et al. (1985). This appears to be a mistake, as neither study lists that fish as a host.