An updated concept and revised composition for Hamacreadium Linton, 1910 (Opecoelidae: Plagioporinae) clarifies a previously obscured pattern of host-specificity among species Author Martin, Storm B. Author Cutmore, Scott C. Author Ward, Selina Author Cribb, Thomas H. text Zootaxa 2017 4254 2 151 187 journal article 33240 10.11646/zootaxa.4254.2.1 64b0d4b0-479e-484a-aaf5-d5237292d4a5 1175-5326 545862 0BDF72E4-5330-4EE7-8560-DF44E71C1F41 Neolebouria pallenisca ( Shipley & Hornell, 1905 ) n. comb. Synonyms: Distoma palleniscum Shipley & Hornell, 1905 ; Plagioporus palleniscus ( Shipley & Hornell, 1905 ) Yamaguti, 1952 ; Hamacreadium palleniscum ( Shipley & Hornell, 1905 ) Yamaguti, 1953 . Records. From a “filefish or triggerfish, Balistes sp.” off Sri Lanka by Shipley & Hornell (1905) as D . palleniscum . Remarks. The excretory vesicle was not described in this species, and the ovary is tri-lobed. The genital pore is distinctly post-bifurcal, but also inter-caecal, and it therefore is most similar to species of Neolebouria belonging to the “maorum” body-type of Dronen et al . (2014). Notably, one of these species, Neolebouria cantherini ( Li, Qiu & Zhang, 1988 ) Cribb, 2005 , is known from a monacanthid (i.e. a filefish), and another, N . capoori , from Indian waters. Neolebouria pallenisca n. comb. is distinguishable from other Neolebouria species of the “maorum” bodytype by its larger size, at 5,000 µm long.