Dr. Kassai Tibor - Dr. Murai Éva szerk.: Parasitologia Hungarica 7. (Budapest, 1974)
Remarks GVOZDEV et al. (1970) relegate in their monography four genera into the family Heteroxynematidae . These are Cephaluris Akhtar, 1947; Fastigiuris Babaev,1966; Dermatoxys Schneider, 1866 (syn. Pikaeuris Akhtar, 1953; Eugenuris Schulz, 1948; Labiostomum Akhtar, 1941. Of these genera, Cephaluris and Fastigiuris are easily separable from the other two by their characteristic cephalic structure. There are,however, different views concerning the taxonomic status and validity of the remaining genera Der matoxys and Labiostomum ,as well as of the Eugenuris and Pikaeuris , the latter genera being considered as synonyms also by GVOZDEV et al. (1970). These views can be divided into- four groups . 1. The describer himself correctly regarded later (AKHTAR, 1956) the genus Pikaeuris as a synonym of Eugenuris However in their monography SKRJABIN et al. (i960) accepted the validity of Der matoxys . Labiostomum , Eugenuris and Pikaeuris . Others give preference to AKHTAR' s view thus deviating opinions are mainly concerned to the problem of distinctness of Eugenuris or its synonymy with Dermatoxys • 2. On the basis of recommendation of DUBININ and DUBININA(1951 ) most workers regard the genus Eugenuris as a synonym of Derma toxys (TOKOBAEV,1959; GVOZDEV, 1956, 1962, 1964; GUBANOV, 1964; TOKOBAEV and ERKULOV, 1966; GVOZDEV and 0V0D0V, 1966; BABAEV and SAPARGELDYEV , 1970; GVOZDEV et al., 1970; ERHARDOVÁ-KOTRLÁ and DANIEL, 1970; JUSHKOV, 1971 ). This opinion is based on the great similarities in structure of mouth, esophagus, esophageal bulb, the position of opening of the female sex organ, the morphology of the male sexual papillae and of the eggs. 3. SPASSKY and RYZHIKOV(l951 ), AKHTAR (1956), MATSEULSKY (1959), BARUS, KULLMAN and TENORA (1972) regard Eugenuris as a valid taxon. In their opinion, the form of the mouth, the number and structure of the lips are suite sufficient for the distinctness of Eugenuris and Dermatoxys . 158
