[Psyllotylenchus chabaudi, n. sp. (Nematodea, Tylenchida: Allantonematidae), a parasite of Nosopsyllus fasciatus (Bosc) (Siphonaptera: Ceratophyllidae)].

The authors describe a new species of entomogenous Nematoda: Psyllotylenchus chabaudi n. sp. (Tylenchida: Allantonematidae) parasite of Nosopsyllus fasciatus (Bosc) (Siphonaptera: Ceratophyllidae), a rat flea, accidentally present on Oryctolagus cuniculus. The new species of Allantonematidae presents in particular a very large preuteral gland. A comparison between the species of the genus Psyllotylenchus which are actually considered as valid is given in the diagnosis.