Monogenea of fishes from the lagoon flats of Palmyra Atoll in the Central Pacific Author Vidal-Martinez, Victor Manuel Author Soler-Jimenez, Lilia Catherinne Author Aguirre-Macedo, Ma. Leopoldina Author Mclaughlin, John Author Jaramillo, Alejandra G. Author Shaw 2, Jenny C. Author James, Anna Author Hechinger, Ryan F. Author Kuris, Armand M. Author Lafferty, Kevin D. text ZooKeys 2017 713 1 23 http://dx.doi.org/10.3897/zookeys.713.14732 journal article http://dx.doi.org/10.3897/zookeys.713.14732 1313-2970-713-1 D70E71F8669C4557B266D4FF8359A511 Acleotrema girellae Johnston & Tiegs, 1922 Type host. Girella tricuspidata (Quoy and Gaimard) ( Kyphosidae ). Other host and localities. Girella tricuspidata from off Caloundra, southeast of Queensland, Australia ( Johnston and Tiegs 1922 ). Kyphosus cinerascens collected off Hawai'i (as Acleotrema kyphosi ) ( Yamaguti 1968 ). Kyphosus elegans (Peters) from Chamela Bay, Mexico (as Heteroplectanum kyphosi ) ( Leon-Regagnon et al. 1997 ). Kyphosus spp. (as A. girellae ) from Australia, the Mediterranean Sea and Mexican Pacific ( Domingues and Boeger 2007 ) (all Kyphosidae ). Current host. Kyphosus cinerascens ( Kyphosidae ). Site infection. Gills. Specimens deposited. CHCM No. 540 (paratypes) (1 slide, 2 specimen), USNM No. 1459852 (voucher). Prevalence and mean intensity. 100 and 84 +/- 90 (n=2). Remarks. Acleotrema girellae was originally described from the gills of G. tricuspidata collected off Caloundra, southeast Queensland, Australia ( Johnston and Tiegs 1922 ). In 1937, Price transferred this species to Diplectanum as D. girellae , considering Acleotrema a junior synonym of Diplectanum , based on the presence of squamodiscs. However, Yamaguti (1963) accepted Acleotrema as a valid genus. Rakotofiringa et al. (1987) proposed the genus Heteroplectanum and several species have been transferred to this new genus, including Diplectanum kyphosi (considered a synonym of A. girellae ) as Heteroplectanum kyphosi (Yamaguti, 1968) Oliver 1987 . However, Domingues and Boeger (2007) considered that species of Acleotrema share unique features and can be distinguished from other diplectanids (including species of Diplectanum ), presenting arguments for considering Heteroplectanum as a junior synonym of Acleotrema . Therefore, Acleotrema kyphosi Yamaguti, 1968, Diplectanum girellae (Johnston & Tiegs, 1922), Heteroplectanum kyphosi (Yamaguti, 1968) Oliver, 1987, Acleotrema gibsoni Young, 1970 and Acleotrema heronensis Young, 1970, are considered synonyms of A. girellae . This species differs from its congeners by having: a tubular MCO with the distal extremity recurved and bifid; and a sclerotised sac with radial musculature involving the proximal portion of the MCO. New geographical record for Palmyra Atoll.