Bychowsky  reported that the Monogenean Diplozoon paradoxum was predominant in the median sector of the gills.
(16.) Chapman LJ, Anciani CAL, Chapman CA (2000) Ecology of a diplozoon parasite on the gills of the African cyprinid Barbus neumayeri.
Host-parasite interface of Diplozoon
paradoxum (Monogenea) in naturally infected bream Abramis brama (L).
Praziquantel effective against Monogenea (Dactylogyrus vastator, Dactylogyrus extensus, Diplozoon paradoxum).
Effects of praziquantel, miclosamide, levamisole hydrochloride and metrifonate on Monogenea (Gyrodactylus aculeati, Diplozoon paradoxum).
A more complex scenario was found to occur in the rivers of the South of France (Herault basin) in which a monogenean (Diplozoon gracile) was found on the gills of four sympatric cyprinid species.
and Diplozoon sp.) were primary parasites, but the authors also examined the trematode Bolbophorus confusus (encysted metacercariae in the body of the intermediate cyprinid hosts), and the acanthocephalan Pomphorhynchus bosniacus, a parasite of the intestines.
Prevalence and abundance revealed that the [F.sub.1] hybrids were more parasitized by Diplozoon sp.
The genus Diplozoon in southern France: speciation and specificity.
The present study reports the results of molecular analysis of the Internal Transcribed Spacer (ITS) of ribosomal DNA of 3 Monogenean species namely Diplozoon kashmirensis Kaw, Diplozoon aegyptensis Fischthal et Kuntz, Diplozoon guptai  using Polymerase Chain Reaction (PCR), nucleotide sequencing and construction of phylogenetic from different fish hosts of the Kashmir valley.
Parasite specimens of three Diplozoon species were collected from fish hosts of Carassius carassius; Cyprinus carpio communis; Schizothorax curvifrons; Schizothorax esocinus; Schizothorax niger and Schizothorax plagiostomus from Wular lake, Anchar lake, Dal lake, Manasbal lake, River Jhelum and River Sindh of Kashmir valley preserved in 100% ethanol for genomic DNA extraction and stored at-200C for good quality of DNA.
The present specimens having rectangular opisthaptor with four pairs of clamps and two individuals in form of a cross belongs to genus Diplozoon Nordmann, 1832.