title: A new species of Comephoronema (Nematoda: Cystidicolidae) from the stomach of the abyssal halosaur Halosauropsis macrochir (Teleostei) from the Mid-Atlantic Ridge.
abstract: A new species of parasitic nematode Comephoronema macrochiri n. sp. (Cystidicolidae), is described from the stomach of the marine deep-sea fish Halosauropsis macrochir (abyssal halosaur) from the Mid-Atlantic Ridge (MAR). The new species, studied with both light and scanning electron microscopy, is characterized mainly by 6 pairs of preanal papillae, by which it principally differs from members of Ascarophis; the spicules are 297-375 microm and 99-120 microm long and fully developed eggs possess 2 long filaments on 1 pole. Rhabdochona beatriceinsleyae is transferred to Comephoronema as C. beatriceinsleyae (Holloway and Klewer, 1969) n. comb. Comephoronema macrochiri differs from all other congeners mainly in having eggs with filaments on 1 pole only, and from individual species by some additional features such as the number of preanal papillae, the shape of pseudolabial projections, and the body and organ measurements.
authors.affiliation: Institute of Parasitology, Biology Centre, Academy of Sciences of the Czech Republic, Branisovská 31, 370 05 Ceské Budvjovice, Czech Republic. moravec@paru.cas.cz
authors.forename: Frantisek
authors.initials: F
authors.lastname: Moravec
authors.forename: Sven
authors.initials: S
authors.lastname: Klimpel
mesh_terms: D000818:Animals; D001267:Atlantic Ocean / Q000453:epidemiology; D005260:Female; D005393:Fish Diseases / Q000453:epidemiology / Q000469:parasitology*; D005399:Fishes; D008297:Male; D015995:Prevalence; D017205:Spirurida Infections / Q000453:epidemiology / Q000469:parasitology / Q000662:veterinary*; D013151:Spiruroidea / Q000145:classification* / Q000302:isolation & purification; D013270:Stomach / Q000469:parasitology*