title: Moravecnema segonzaci gen. et sp. n. (Nematoda: Cystidicolidae) from Pachycara thermophilum (Zoarcidae), a deep-sea hydrothermal vent fish from the Mid-Atlantic Ridge.
abstract: A new cystidicolid nematode, Moravecnema segonzaci gen. et sp. n. is described from the intestine of the teleost fish Pachycara thermophilum Geistdoerfer (Zoarcidae) from the hydrothermal sites Logatchev and Snake Pit-Moose of the Mid-Atlantic Ridge, at depths of 3,008; 3,492, and 3,510 m. The new genus Moravecnema is characterised by a dorsoventrally elongated oral opening, rudimentary pseudolabia, and four pairs of precloacal and six pairs of postcloacal caudal papillae in the male. The species has two spicules of unequal length, about 330 and 80 microm long. Males are about 5 mm and females about 5-10 mm long. Eggs have long thin polar filaments. This is the first species of parasitic nematode described from a fish endemic to hydrothermal deep-sea vents.
authors.affiliation: Laboratoire de Biologie Parasitaire, Protistologie, Helminthologie, Muséum National d'Histoire Naturelle, 61 Rue Buffon, 75231 Paris cedex 05, France. justine@mnhn.fr
authors.forename: Jean-Lou
authors.initials: JL
authors.lastname: Justine
authors.forename: Jimmy
authors.initials: J
authors.lastname: Cassone
authors.forename: Annie
authors.initials: A
authors.lastname: Petter
mesh_terms: D000818:Animals; D001267:Atlantic Ocean; D005260:Female; D005399:Fishes / Q000469:parasitology*; D007422:Intestines / Q000469:parasitology; D008297:Male; D008857:Microscopy, Interference / Q000662:veterinary; D009348:Nematoda / Q000033:anatomy & histology*