Abstract
Scanning electron microscopy (SEM) has been used to study the tegument and related structures of adult Dicrocoelium dendriticum. Its body shape, suckers, common genital pore, Laurer's canal pore, excretory pore, and cirrus are described as seen under SEM. The tegument is devoid of spines and presents an interlacing, ridged network which covers the entire body. The pattern of ridges on the body surface is not homogeneous; details of the pattern in each region are described. SEM of the body surface reveals the high density of tegumental vesicles on ridge walls and valley floors. The tegument also bears small finger-like projections in certain areas. The authors suppose that the vesicles and finger-like projections of the tegument may well be the same structure in different functional stages. Some considerations on the significance of the tegumental differences in each body region are given. Four types of tegumental papillae occur on the suckers and body surface of D. dendriticum: button, rosette, plate, and domed. The dimensions, shapes, position, and arrangement of the papillae are described.
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References
Bakke TA (1976a). Shape, size and surface topography of genital organs of Leucochloridium sp. (Digenea), revealed by light and scanning electron microscopy. 2 Parasitenkd 51:99–113
Bakke TA (1976b) Functional morphology and surface topography of Leucochloridium sp. (Digenea) revealed by scanning electron microscopy. Z Parasitenkd 51:115–128
Bakke TA (1984) A redescription of adult Phyllodistomum umblae (Fabricius) (Digenea: Gorgoderidae) from Salvelinus alpinus (L.) in Norway. Zool Scr 13:89–99
Bakke TA (1985) Phyllodistomum conostomum (Olsson, 1876) (Digenea, Gorgoderidae): a junior subjective synonym for P. umblae (Fabricius, 1870). Zool Scr 14:161–168
Bakke TA, Lien L (1978) The tegumental surface of Phyllodistomum conostomum (Olsson, 1876) (Digenea) revealed by scanning electron microscopy. Int J Parasitol 8:155–161
Bakke TA, Zdarska Z (1985) Tegumental microtopography and papillae arrangement of adult Phyllodistomum folium (Olfers, 1816) (Digenea, Gorgoderidae) from pikes Esox lucius L. Folia Parasitol 32:43–49
Becker B, Mehlhorn H, Andrews P, Eckert J (1980) Light and electron microscopic studies on the effect of praziquantel on Schistosoma mansoni, Dicrocoelium dendriticum, and Fasciola hepatica (Trematoda) in vitro. Z Parasitenkd 63:113–128
Bennet CE (1975) Scanning electron microscopy of Fasciola hepatica L. during growth and maturation in the mouse. J Parasitol 61:892–898
Edwards HH, Nollen PM, Nadakavukaren MJ (1977) Scanning and transmission electron microscopy of oral sucker papillae of Philophthalmus megalurus. Int J Parasitol 7:429–437
Font WF, Wittrock DD (1980) Scanning electron microscopy of Leucochloridiomorpha constantiae during development from metacercaria to adult. J Parasitol 66:955–964
Fried B, Fujino T (1984) Scanning electron microscope of Echinostoma revolution (Trematoda) during development in the chick embryo and the domestic chick. Int J Parasitol 14:75–81
Fujino T, Ishii Y, Choi DW (1979) Surface ultrastructure of the tegument of Clonorchis sinensis newly excysted juveniles and adult worms. J Parasitol 65:579–590
Garcia-Corrales P (1971) Anatomia e histologia del sistema nervioso de Dicrocoelium dendriticum. PhD Thesis, Universidad Complutense, Madrid
Hess E, Guggenheim R (1977) A study of the microtriches and sensory processes of the tetrathyridium of Mesocestoides corti Hoeppli, 1925, by transmission and scanning electron microscopy. Z Parasitenkd 53:189–199
Hoole D, Mitchell JB (1981) Ultrastructural observations on the sensory papillae of juvenile and adult Gorgoderina vitelliloba (Trematoda: Gorgoderidae). Int J Parasitol 11:411–417
Marchiondo AA, Andersen FL (1983) Fine structure and freeze-etch study of the protoscolex tegument of Echinococcus multilocularis (Cestoda). J Parasitol 69:709–718
Morseth DJ (1967) Fine structure of the hydatid cyst and protoscolex of Echinococcus granulosus. J Parasitol 53:312–325
Nadakavukaren MJ, Nollen PM (1975) A scanning electron microscopy investigation of the outer surface of Gorgoderina attenuata. Int J Parasitol 5:591–595
Otubanjo OA (1985) Scanning electron microscopic studies of the body surface and external genitalia of a dicrocoeliid trematode Concinnum epomopis Sandground 1973. Z Parasitenkd 71:495–504
Page MR, Nadakavukaren MJ, Huizinga HW (1980) Ribeiroia marini surface ultrastructure of redia, cercaria and adult. Int J Parasitol 10:5–12
Samuelson JC, Caulfield JP (1985) The cercarial glycocalix of Schistosoma mansoni. J Cell Biol 100:1423–1434
Smyth JD (1967) Studies on tapeworm physiology: XI. “In vitro” cultivation of Echinococcus granulosum from the protoscolex to the strobilate stage. Parasitology 57:111–133
Tandon V, Maitra SC (1982) Scanning electron microscopic observations on the tegumental surfaces of two rumen flukes (Trematoda: Paramphistomata). J Helminthol 56:95–104
Thulin J (1980) Scanning electron microscope observations of Aporocotyle simplex Odhner, 1900 (Digenea: Sanguinicolidae). Z Parasitenkd 63:27–32
Ubelaker JE, Allison VF, Specian RD (1973) Surface topography of Hymenolepis diminuta by scanning electron microscopy. J Parasitol 59:667–671
Ubelaker JE, Specian RD, Allison VF (1974) Scanning electron microscopic studies on the tegument of trematodes. 32nd Annual Proceedings of the Electron Microscopy Society of America. St. Louis, Missouri, 1974. C.D. Arceneaux (ed)
Wittrock DD (1976) Structure of the cirrus tegument of Quinqueserialis quinqueserialis (Trematoda: Notocotylidae). J Parasitol 62:834–836
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Cifrian, B., Garcia-Corrales, P. Scanning electron microscopy of adult Dicrocoelium dendriticum . Parasitol Res 74, 235–242 (1988). https://doi.org/10.1007/BF00539571
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DOI: https://doi.org/10.1007/BF00539571