Phylogeny and revision of Diplectanidae Monticelli, 1903 (Platyhelminthes: Monogenoidea) Author Domingues, Marcus V. Author Boeger, Walter A. text Zootaxa 2008 1698 1 40 journal article 10.5281/zenodo.180750 5dceb45e-697e-4b7c-ba08-dca724f4c62a 1175-5326 180750 Lepidotrema Johnston & Tiegs, 1922 Synonymy: Empleurodiscus Johnston & Tiegs, 1922 ; Flabellodiscus Johnston & Tiegs, 1922 ; Squamodiscus Yamaguti, 1934 . Diagnosis: Tegument smooth or scaled. Genital pore opening anterior to male copulatory organ (MCO) [50] . Genital atrium muscular. Vas deferens intercaecal or looping left intestinal caecum. MCO tubular, composed of 2 nested tubes; external tube twisted [49] . Accessory piece absent. Prostatic reservoir simple. Accessory copulatory organ absent. Vaginal atrium sclerotized [51] . Vaginal aperture marginal. Squamodiscs, ventral, dorsal; anterior rows of rodlets with open rings. Accessory spines associated with the posterior region of the haptor [48] . Superficial root of ventral anchor reduced. Parasites of freshwater and marine perciform fishes ( Terapontidae ). Type species: L. therapon Johnston & Tiegs, 1922 from Hephaestus carbo (Ogilby & McCulloch) . Other species: L. angustum ( Johnston & Tiegs, 1922 ) Price, 1937 from Leiopotherapon unicolor (Günther) ; L. bidyana Murray, 1931 from Bidyanus bidyanus (Mitchell) ; L. fuliginosum Johnston & Tiegs, 1922 from Hephaestus fuliginosus Macleay ; L. kuwaitensis Kritsky, Jiménez-Ruiz & Sey, 2000 from Terapon puta Cuvier ; L. longipenis ( Yamaguti, 1934 ) Kritsky, Jiménez-Ruiz & Sey, 2000 from Rhynchopelates oxyrhynchus (Temminck & Schlegel) ; L. simplex ( Johnston & Tiegs, 1922 ) Price, 1937 from Hephaestus fuliginosus ; L. tenue Johnston & Tiegs, 1922 from Scortum hillii (Castelnau) . Remarks: Bychowsky (1957) suggested the homology between spines in the peduncle (peduncular spines, sensu Domingues & Boeger 2006 ) of Rhamnocercinae (see comments above) and squamodiscs of members of Lepidotrema . Although our analysis did not support the homology between these structures, Lepidotrema appears as sister group of Spinomatrix + Rhamnocercus + Rhamnocercoides (in clade “R”) within Diplectaninae, based on the presence of accessory spines associated with the posterior region of the haptor [48] and MCO tubular, composed of 2 nested tubes; external tube twisted [49].