title: Dactylogyridae (Monogenea) from the gills of Iheringichthys labrosus (Osteichthyes: Pimelodidae) from the upper Paraná River floodplain, Brazil, with the proposal of Pseudovancleaveus n. g.
abstract: Two new species of Demidospermus Suriano, 1983 and a new genus, Pseudovancleaveus, and species are described from the gills of Iheringichthys labrosus (Pimelodidae). The fishes were collected from the upper Paraná River floodplain, Brazil. D. mandi n. sp. is characterised by the distal region of the copulatoty organ having an expanded bulb and D. labrosi n. sp. by the copulatory organ having a funnel-shaped proximal extremity. The latter species also has an accessory piece comprising a variable sheath enclosing the distal shaft of the copulatory organ and two anterolateral structures resembling irregular spheres. Pseudovancleaveus paranaensis. n. g., n. sp. is characterised by a sinistral vagina, overlapping gonads, a copulatory ligament, anchors without a fold on the base and hooks with slightly inflated shanks. A new combination, Pseudovancleaveus platensis, is proposed for Vancleaveus platensis Suriano & Incorvaia, 1995.
authors.affiliation: Universidade Estadual de Maringá, Nupélia, Bloco G-90, Av Colombo, 5790, 87020-900, Maringá, State of Paraná, Brazil.
authors.forename: Jakeline G
authors.initials: JG
authors.lastname: França
authors.forename: Andréia
authors.initials: A
authors.lastname: Isaac
authors.forename: Gilberto C
authors.initials: GC
authors.lastname: Pavanelli
authors.forename: Ricardo M
authors.initials: RM
authors.lastname: Takemoto
mesh_terms: D000818:Animals; D001938:Brazil; D002397:Catfishes / Q000469:parasitology*; D005260:Female; D005618:Fresh Water; D005880:Gills / Q000469:parasitology; D014200:Trematoda / Q000033:anatomy & histology*