HomePhilippine Journal of Veterinary Medicinevol. 40 no. 1 (2003)

Scanning Electron Microscope Observation on Two Species of the Genus Carmyerius Stiles & Goldberger, 1910 (Paramphistomoidea: Gastrothylacidae)

Salcedo L. Eduardo

Discipline: Veterinary Medicine



Adult forms of two species of the genus Carmyerius, C. exoporus Maplestone, 1923 and C. cruciformis (Leiper, 1908) were exnmined under the scanning electron microscope. The body of both species showed transverse folds dorsally, laterally and ventrally giving a wrinkled appearance of the worms. Both species revealed the presence of acetabular radial folds and tegumental papillae which are irregularly distributed on the body surface but concentrated around the acetabulum, oral and ventral pouch openings. In C. exoporus, those around the acetabulum were dome-shaped with smooth surface and those around the oral and genital

openings were dome-shaped with cilia on their apices. The genital pore in C. exoporus was visible from the outside and the terminal genitalium may be retracted or everted. In C. cruciformis, the genital opening was not visible from the outside. Both the oral and ventral openings in this species were surrounded by tegumental papillae which were dome-shaped but with smooth surface and were larger that those around the acetabulum. The two species are compared with other species of the family Gastrothylacidae whose body surface has been examined by SEM. The significance of these radial folds and tegumental papillae is