First report of aflagellate spermatozoon in a parasitic Platyhelminthe, found in the Monogenean Diplozoon gracile (Polyopisthocotylea, Diplozoidae)J.-L. Justine, N. Le Brun and X. MatteiAnn. Parasitol. Hum. Comp., 60 6 (1985) 761-762DOI: https://doi.org/10.1051/parasite/1985606761