Morphological identification and molecular characterization of 18S rDNA of two hemiurid trematodes (Lecithocladium cristatum Rudolphi, 1819 and Lecithocladium parviovum Yamaguti, 1953) infecting the greater lizardfish Saurida tumbil (Pisces: Synodontidae) inhabiting the Red Sea - Abdel-Gaber, R.; Fouad, D.; Ataya, F.; Morsy, K.; Maher, S. (Gene, 2019)