title: Two new nematode species, Paragendria papuanensis sp. n. (Seuratoidea) and Rhabdochona papuanensis sp. n. (Thelazioidea), from freshwater fishes in Papua New Guinea.
abstract: Two new nematode species, Paragendria papuanensis sp. n. (Quimperiidae) and Rhabdochona papuanensis sp. n. (Rhabdochonidae), are described from the intestine of freshwater fishes Glossamia giellerupi (Weber et Beaufort) (Apogonidae) and Melanotaenia affinis (Weber) (Melanotaeniidae), respectively, from the Sogeram River (Ramu River basin), Madang Province, northern Papua New Guinea. The former species is characterized mainly by the absence of oesophageal teeth, the presence of conspicuously inflated papillae of the last two subventral pairs, a gubernaculum, spicules 69-75 microm long, eggs measuring 57-66 x 39-45 microm, and by a small body (male and female 3.2-3.7 and 5.8 mm long, respectively). Paragendria is considered a valid genus, to which P. aori (Khan et Yaseen, 1969) comb. n., P. guptai (Gupta et Masoodi, 2000) comb. n., P. hanumanthai (Gupta et Jaiswal, 1988) comb. n. and P. vermae (Gupta et Masoodi, 2000) comb. n. are newly transferred. Rhabdochona papuanensis differs from all congeners mainly in having hammer-shaped deirids and from individual species also in other characters. Both findings represent the first records of species of Paragendria and Rhabdochona from the Australian zoogeographical region and the first records of the representatives of these genera from fishes of the families Apogonidae and Melanotaeniidae, respectively.
authors.affiliation: Institute of Parasitology, Biology Centre of the Academy of Sciences of the Czech Republic, Branisovská 31, 370 05 Ceské Budejovice, Czech Republic. moravec@paru.cas.cz
authors.forename: Frantisek
authors.initials: F
authors.lastname: Moravec
authors.forename: Milan
authors.initials: M
authors.lastname: Ríha
authors.forename: Roman
authors.initials: R
authors.lastname: Kuchta
mesh_terms: D000818:Animals; D017162:Ascaridida / Q000033:anatomy & histology / Q000145:classification* / Q000302:isolation & purification* / Q000648:ultrastructure; D017191:Ascaridida Infections / Q000469:parasitology / Q000662:veterinary*; D005260:Female; D005393:Fish Diseases / Q000469:parasitology*; D005618:Fresh Water; D007422:Intestines / Q000469:parasitology; D008297:Male; D008853:Microscopy; D008855:Microscopy, Electron, Scanning; D010219:Papua New Guinea; D010473:Perciformes; D023701:Smegmamorpha; D017205:Spirurida Infections / Q000469:parasitology / Q000662:veterinary*; D013151:Spiruroidea / Q000033:anatomy & histology / Q000145:classification* / Q000302:isolation & purification* / Q000648:ultrastructure