Surface ultrastructure of Metagonimus takahashii metacercariae and adults

Surface ultrastructure of the adult stage of Acanthotrema felis (Trematoda: Heterophyidae)

“…For the case of H. continua, the number of digitations in the tegumental spines of the anterior body increased from 10-14 to 15-17 as the worm matured from a metacercaria to the adult fluke (Hong et al, 1991). Similar findings have been reported in other heterophyid flukes (Chai et al, 1998(Chai et al, , 2000. However, information on the surface ultrastructure of the metacercariae and juvenile worms of A. felis are, at present, unavailable, and the changing patterns of the tegumental spines according to the maturation of worms are unknown.…”

“…In conclusion, the surface ultrastructure of A. felis was generally similar to that of other heterophyid flukes (Lee et al, 1984;Hong et al, 1991;Chai et al, 1992Chai et al, , 1998Chai et al, , 2000, however, some features are characteristic, and may be of taxonomic and bioecological significance.…”

“…The tegument on the postero-dorsal surface, where the spines are long, but narrow, with 6-8 pointed tips. been observed in other heterophyid flukes (Køie, 1977(Køie, , 1992Lee et al, 1984;Taraschewski, 1984;Fujino et al, 1989;Hong et al, 1991;Chai et al, 1992Chai et al, , 1998Chai et al, , 2000Srisawangwong et al, 1997;Uga et al, 1998;Woo et al, 1998).…”

Tegumental ultrastructure of Echinoparyphium recurvatum according to developmental stages

“…In case of some intestinal digeneans, tegumental spines are enlarged and more pointed as the worm maturates (Køie, 1977;Lee et al, 1985;Hong et al, 1991;Chai et al, 1998Chai et al, & 2000. The aforementioned findings have been observed in some tissue migrating trematodes i.e., Fasciola hepatica (Bennett, 1975), Paragonimus westermani (Lee et al, 1981) and Paragonimus iloktsuenensis (Lee et al, 1989).…”

Topography and ultrastructure of the tegument of Aphallus tubarium (Rodolphi, 1819) Poche, 1926 (Digenea: Cryptogonimidae), intestinal parasite of the common Dentex dentex (Linnaeus 1758) from Valinco Gulf

“…Examples include Metadena depressa (Stossich, 1883), Metadena phoceae Gibson 2001, Parspina argentinensis (Szidat, 1954) or Parspina bagre Pearse, 1920 (Bartoli andGibson, 2001;Ostrowski de Nũnez et al, 2011). The pattern of digenean tegumental spines is a commonly quoted taxonomic feature, and differences in structures and distribution over the body may be significant in host parasites relationship (Bundy, 1982;Chai et al, 2000). Investigations with electron microscopy have permitted to deepen and complete results mentioned by Bartoli and Bray (1987).…”