A redescription of the nematode Ph. obturans (Prenant, 1886), based on specimens from pike (Esox lucius L.) from the R. Elbe basin in Czechoslovakia, is presented. In addition to gravid, subgravid and mature females from the blood system also the male and mature female, found for the first time in the host's eye, are described. The paper is supplemented by a key for the identification of the philometrid nematodes parasitizing freshwater fishes of Europe.

Philometra longa n. sp. (Nematoda: Philometridae), a new parasite from the abdominal cavity of the eastern sea garfish Hyporhamphus australis (Hemiramphidae, Beloniformes) off Australia

Redescription of Philometra pellucida (Jägerskiöld, 1893) (Nematoda: Philometridae) parasitic in the abdominal cavity of the blackspotted puffer Arothron nigropunctatus (Bloch & Schneider) (Teleostei: Tetraodontidae) off Australia and Japan

Two new species of Philometra Costa, 1845 (Nematoda: Philometridae) from Mycteroperca spp. (Serranidae) in the North-West Atlantic and northern Gulf of Mexico, USA

Descriptions of Philometra aenei n. sp. and P. tunisiensis n. sp. (Nematoda: Philometridae) from Epinephelus spp. off Tunisia confirm a high degree of host specificity of gonad-infecting species of Philometra Costa, 1845 in groupers (Serranidae)

Two species of Philometra (Nematoda: Philometridae) from sparid fishes (porgies) off Sicily, Italy, including Philometra obladae sp. n. from the body cavity of Oblada melanura (Sparidae)

Ultrastructure of the body wall of female Philometra obturans (Nematoda: Dracunculoidea)