Pseudodiplectanum Tripathi, 1957

Diagnosis: Tegument smooth or scaled. Genital pore opening posterior to male copulatory organ (MCO). Genital atrium muscular. Vas deferens intercaecal. MCO tubular, composed of nested tubes [31], twisted or sinuous; external tube uniform; accessory piece present (exceptionally absent on P. c a b a l l e ro i). Prostatic reservoir simple. Accessory copulatory organ absent. Vaginal atrium sclerotized. Vaginal aperture medial. Squamodiscs ventral, dorsal; anterior rows of rodlets with open rings. Ventral anchor probe shape [32]. Parasites of marine teleosteans fishes (Pleuronectiformes and Osteoglossiformes).

Type-species: P. cynoglossum Tripathi, 1957 from Cynoglossus arel (Bloch & Schneider) (type host), and Cynoglossus bilineatus (Lacépède) (Cynoglossidae).

Other species: P. bychowskii Nagibina, 1977 from C ynoglossus bilineatus; P. caballeroi Nagibina, 1977 from Symphurus orientalis (Bleeker) (Cynoglossidae); P. gibsoni (Oliver, 1980) Oliver, 1987 from Microchirus variegatus (Donovan) (Soleidae); P. kearnei Vala, Lopez-Roman & Boudaoud, 1980 from Solea solea (Linnaeus); P. lucknowensis Agrawal & Sharma, 1986 from Chitala chitala (Hamilton) (Notopteridae, Osteoglossiformes); P. syrticum Derbel, Boudaya & Neifar, 2007 from Synapturichthys kleinii (Risso) (Soleidae).

Remarks: Oliver (1987) recognized two different morphological types of MCO in Pseudodiplectanum: (1) spiraled (P. bychowskii, P. caballeroi, P. cynoglossum) and (2) tubular with accessory piece (P. gibsoni, P. kearni). Except for P. caballeroi, all the other species present accessory piece. However, despite the fact that we could not confirm the presence of accessory piece in the unavailable specimens of P. caballeroi, we decided to retain all species in the genus, without proposal of new taxonomic rearrangement until information about this species be available.