Light and electron microscopy of paranella diplodae N. SP. (polyopisthocotylea ; microcotylidae ; monogenea)‎ from some Red Sea teleost fishes in Egypt

الملخص EN

The present study deals with a monogenean parasite infecting, some marine fish through light and scan electron microscopy.

It revealed that the percentage of infection was 48 % (14 out of 50 fish), 28 % (14 out of 50 fish), 22 % (11 out of 50 fish) and 16 % (8 out of 50 fish) in Diplodus noct, Gerres oyena, Lethrinus elongates and Siganus revulatus, respectively.

The present work recorded Paranaella diplodae (Polyopisthocotylea; Microcotylidae; Monogenea) as a new species collected from the investigated fish gills.

They are lanculate flukes, the haptor is not distinguished from the body proper approximately 1 / 3 of the whole body length.

The surface topography of the parasite bears small pits and conspicuous transverse folds and richly supplied with papillae-like unicellate sensory ending.

The opisthohaptor is typical of Microcotylidae.

The clamp structure and the haptoral tegument are similar to the rest of the body.