Redescription of Mehdiella microstoma and description of Mehdiella petterae sp. n., with a new definition of the genus Mehdiella Seurat, 1918 (Nematoda: Pharyngodonidae).

The generic diagnosis of Mehdiella Seurat, 1918 is emended based on study and redescription of Mehdiella microstoma (Drasche, 1884) from the caecum of Testudo graeca Linnaeus, 1758 collected in Settat, Morocco and on study and description of a new species, Mehdiella petterae sp. n., from the large intestine of Testudo hermanni (Gmelin, 1789) collected in Catalonia, Spain. Scanning electron microscopy (SEM) studies revealed substantial differences in the structure of the mouth and the caudal end, and made possible to differentiate the new species from the others. SEM studies showed the real and sound characteristics of the genus Mehdiella, namely number of anal papillae 2 instead of 3, post-anal papillae pedunculate or sessile instead sessile.

Oxyuroids of palearctic Testudinidae--new definition for Alaeuris Seurat, 1918 (Nematoda: Pharyngodonidae) and redescription of Alaeuris numidica (Seurat, 1918).

The generic diagnosis of Alaeuris is emended based on the study and redescription of Alaeuris numidica from the cecum of Testudo graeca collected in Settat, Morocco and of Testudo hermanni collected in Catalonia, Spain. Scanning electron microscopy studies revealed that the papillae previously described as adanal are simple lobes because of the lack of terminal nerves, and that both preanal and postanal papillae are pedunculate. These new findings allowed us to emend the diagnosis of the genus and the species. A list of species of Alaeuris with biogeographic regions and hosts is provided.

[Research on the life-cycle of Metahaematoloechus exoterorchis (Rees, 1964) (Digenea) parasite of lungs of the frog Dicroglossus occipitalis (Gunther, 1858) in Togoland (author's transl)]. / Recherches sur le cycle biologique de Metahaematoloechus exoterorchis (Rees, 1964). Trématode pulmonaire de l'Amphibien Dicroglossus occipitalis (Günther, 1858) au Togo.

The sporocysts and xiphidiocercariae of Metahaematoloechus exoterorchis evolve in the Planorbid Segmentorbis kanisaensis (Preston); experiment shows that Gyraulus chudeaui (Germain) and Bulinus forskalii (Erhenberg) are possible vectors. Cercariae encyst in larvae of several Dragonflies. M. exoterorchis adult, is usually harboured by Dicroglossus occipitalis, but experimentally develops in the frog Contraua derooi Hulselmans, 1971.

[Experimental research on the life cycle of Opisthorchis chabaudi n. sp. Description of the adult (author's transl)]. / Recherches expérimentales sur le cycle biologique d'Opisthorchis chabaudi n. sp. Description de l'adulte.

O. chabaudi n. sp. is experimentally obtained from cercariae, born into rediae and naturally produced by the snail Gabbia neumanni (Martens, 1898). Cercariae encyst into some tadpoles. The adulte grows into the biliary ducts of the Cat. O. chabaudi is mainly characterized by its outline, therefore by the shape and position of its reproductive systems. Accidental human contamination possibility is not denied.

[Research of the life cycle of a Paramphistomidae (Trematoda) of amphibians in Africa (author's transl)]. / Recherches sur le cycle biologique d'un Paramphistomidae (Trematoda) d'amphibiens en Afrique.

The intermediate hosts of Diplodiscus subclavatus are in Togo, Bulinus forskalii and Segmentorbis kinisaensis. The cercariae, amphistome, leave soon the rediae to achieve their development at the top of the hepatopancreas of the mollusc. The usual infestation of the definitive host occurs by penetration of cercariae into tadpoles with the water flood. Secondary ways of infestation keep up the prevalence near a high level.

[New data on Dicrocoelium hospes Looss, 1907: anatomy of the adult and life cycle. Preliminary paper (author's transl)]. / Données nouvelles sur Dicrocoelium hospes Looss, 1907: anatomie de l'adulte et cycle évolutif. Note préliminaire

The morphological and anatomical studies of Dicrocoelium hospes Looss, 1907, from Togo set off several differences with Dicrocoelium lanceolatum Rudolphi, 1819: shape and dimensions of the body, shape and disposition of the testes, shape, dimensions and location of the vitellaria, structure of the uterus coils. The first intermediate host is found, they are three species of Limicolaria, one of them being L. aurora. The cercaria is described, its chaetotaxy confirms the validity of species D. hospes. Two species of ants: Dorylus sp. and Crematogaster sp. may be the second intermediate host.