Cainocreadium longisaccum ( Siddiqi & Cable, 1960 ) Durio & Manter, 1968

Martin, Storm B., Cutmore, Scott C., Ward, Selina & Cribb, Thomas H., 2017, An updated concept and revised composition for Hamacreadium Linton, 1910 (Opecoelidae: Plagioporinae) clarifies a previously obscured pattern of host-specificity among species, Zootaxa 4254 (2), pp. 151-187 : 172

Cainocreadium longisaccum ( Siddiqi & Cable, 1960) Durio & Manter, 1968

Synonyms: Hamacreadium longisaccum Siddiqi & Cable, 1960 .

Records. From the rock hind, Epinephelus adscensionis (Osbeck) , off Puerto Rico by Siddiqi & Cable (1960). From the red hind, Epinephelus guttatus (Linnaeus) , off the British Virgin Islands by Dyer (1983), and off Puerto Rico by Dyer et al. (1985) and Bunkley-Williams et al. (1996).

Remarks. This species was described based on three specimens. Its most notable feature is its long cirrus-sac, extending well posterior to the ventral sucker. The excretory vesicle extends to the pharynx and the genital pore was originally described as slightly submedial ( Siddiqi & Cable 1960), but Durio & Manter (1968) considered it medial. Because the host is a serranid, the combination of Durio & Manter (1968) is recognised here, but the condition of the excretory vesicle and cirrus-sac also make this species comparable with those of Bentholebouria and Pacificreadium serrani .