Dr. Murai Éva szerk.: Parasitologia Hungarica 26. (Budapest, 1993)

This species was originally described by Reichenbach-Klinke (1961) asDiplozoon paradoxum bliccae n. ssp. from the host Blicca bjoerkna. The differential diagnosis given by Reichenbach-Klinke is not correct. According to Reichenbach-Klinke it differs from D. paradoxum in the very small oral sucker (0.06 mm) and in the tegument of the perioral region covered by blunt spines. He does not mention the structure of the clamps, the central hooks, the morphology of the gut and the distal part of the body which features represent the real basis of taxon determination. The "spines" on the surface of the tegument are glandular structures, common for all Diplozoids. The figure given by Reichenbach-Klinke is very schematic and inadequate for identification. Gläser and Gläser (1964) described from the same host (Blicca bjoerkna) a new species under the name of Diplozoon gussevi. Their description is correct, and it is complemented with detailed drawings and pictures. They made only a small but essential mistake when they mentioned that the anterior marginal sclerits were continuous. Actually the marginal sclerits are similar to those of other Diplozoids in structure, i.e. they are interrupted. The inverse "T" shaped distal part of the anterior median sclerit dips into the gap between the tips of the marginal sclerits (Fig.l). Khotenovsky (1985) recognized this situation and reported the species D. gussevi as a junior synonym of D. bliccae. He raised the subspecies D. paradoxum bliccae to the rank of species. Paradiplozoon zeller Gyntovt, 1967 Host: Cyprinus carpio Measurements (in pm): length of body: proximal part: 3160; distal part: 1453; width:800; number of plicae: 23-24; width of clamp I: 130-132; width of clamps II-IV: 160-162; length of central hook: 22. Of the species found D. paradoxum and P. bliccae (as D. gussevi) have already been recorded from the Hungarian fauna (Molnár 1970). D. scardinii, P. alburni and P. zeller are described from Hungarian fishes for the first time. Matskási I. és Sey ().: Adatok a balatoni halak Monogenea faunájához A balatoni halak élősködő faunájának vizsgálata során öt, a Diplozoidae családba tartozó kopoltyúféreg faj került elő. A D. paradoxum és a D. bliccae fajt Molnár (1970) mutatta ki korábban magyarországi halak kopolytújáról. Az utóbbi fajt azonban, támaszkodva Gläser és Gläser (1964) munkájára, D. gussevi néven említi. Khotenovsky (1985) részletes vizsgálata alapján a D. gussevi fajt a D. bliccae szinonimájának tartja. Saját vizsgálatunk megerősíti Khotenovsky megállapítását. A fajról részletes leírást, valamint rajzot közlünk. Három faj, a Diplozoon scardinii, a Paradiplozoon alburni és a /? zeller a magyarországi faunára nézve új fajnak bizonyult.