title: Revision and phylogeny of rhamnocercinae monaco, Wood et Mizelle, 1954 (Monogenoidea: Diplectanidae).
abstract: Species of Rhamnocercinae Monaco, Wood et Mizelle, 1954 are gill parasites of sciaenid fishes (Perciformes). Seven are marine species (three in the western Atlantic and four in oriental Pacific) and one is a neotropical freshwater species (Rio Doce Basin, Brazil). While the status of the subfamily may be questioned, this assemblage of species is apparently supported by several shared apomorphic and plesiomorphic characters, such as: (1) peduncular spines with anterior and posterior roots; (2) haptor laterally expanded, armed with anchors (two pairs); bars (one ventral, two dorsal); 14 hooks and haptoral accessory spines; and (3) double (nested) tubes of the male copulatory organ (MCO), directed posteriorly with the genital pore lying posterior to the MCO. The phylogenetic hypothesis for the eight known species of this clade is: (Spinomatrix penteormos (Rhamnocercoides stichospinus, Rhamnocercoides menticirrhi) Rhamnocercus oliveri (Rhamnocercus rhamnocercus (Rhamnocercus stelliferi, Rhamnocercus bairdiella, Rhamnocercus margaritae)). This hypothesis indicates that Spinomatrix penteormos represents the sister group of all remaining rhamnocercines. The resulting phylogenetic sister-group relationships support the transfer of Rhamnocercus stichospinus Seamster et Wood, 1956 to Rhamnocercoides Luque et Iannacone, 1991 as Rhamnocercoides stichospinus (Seamster et Wood, 1956) n. comb.
authors.affiliation: Curso de Pós Graduação, Zoologia, Laboratório de Parasitologia Evolutiva, Departamento de Zoologia, Universidade Federal do Paraná, Caixa Postal 19073, 81531-980 Curitiba, PR, Brasil. mvdomingues@ib.usp.br
authors.forename: Marcus V
authors.initials: MV
authors.lastname: Domingues
authors.forename: Walter A
authors.initials: WA
authors.lastname: Boeger
mesh_terms: D000818:Animals; D010473:Perciformes / Q000469:parasitology*; D010802:Phylogeny; D014200:Trematoda / Q000033:anatomy & histology / Q000145:classification* / Q000235:genetics