Zusammenfassung
Die Organisation von Bandwürmern wurde am Beispiel von 5 Arten (Hymenolepis nana, H. diminuta, H. microstoma, Taenia (Hydatigera) taeniaeformis, Echinococcus multilocularis, Cestoda; Cyclophyllidea) licht- und elektronenmikroskopisch (SEM, TEM) untersucht. Dabei zeigte sich, daß keine inneren Begrenzungen zwischen den äußerlich sichtbaren Proglottiden auftreten und keine echte metamere Segmentierung im Sinne der Anneliden besteht. Daher werden die in der Literatur zur Beschreibung der Morphologie der Cestoden verwendeten Begriffe kritisch diskutiert.
Abstract
The organisation of five species of cyclophyllidean cestodes (Hymenolepis nana, H. diminuta, H. microstoma, Taenia (Hydatigera) taeniaeformis, Echinococcus multilocularis) has been studied using light and electron microscopy (SEM, TEM). It was found that there is no indication of any internal structure separating the proglottids, which are recognisable superficially. Thus in cestodes there is no metameric segmentation as in annelids. The implications of these findings on the terminology of tapeworm morphology are critically discussed.
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Abbreviations
- BL:
-
Basal lamina
- C:
-
Constriction
- CI:
-
Cirrus
- CM:
-
Circular muscles
- E:
-
Cross-connection between longitudinal excretory canals
- EG:
-
Eggs
- EL:
-
Longitudinal excretory canals
- IF:
-
Infolding
- LM:
-
Longitudinal muscles
- M:
-
Microtriches
- N:
-
Neck
- NE:
-
Nerve
- OL:
-
Overlapping margin of a proglottis
- OV:
-
Ovary
- P:
-
This zone appears as proglottis
- R:
-
Rostellum
- RS:
-
Receptaculum seminis
- S:
-
Sucker
- SC:
-
Scolex
- SEM:
-
Scanning electron microscopy
- T:
-
Testes
- TEM:
-
Transmission electron microscopy
- TG:
-
Tegument (syncytial layer)
- TGC:
-
Tegumental cells (basal to syncytial layer)
- UP:
-
Underlying parenchymal and muscle cells
- UT:
-
Uterus
- VI:
-
Vitellarium
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Dedicated to Prof. Dr. Rudolf Gönnert on the event of his 70th birthday
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Mehlhorn, H., Becker, B., Andrews, P. et al. On the nature of the proglottids of cestodes: A light and electron microscopic study onTaenia, Hymenolepis, andEchinococcus . Z. Parasitenkd. 65, 243–259 (1981). https://doi.org/10.1007/BF00926718
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DOI: https://doi.org/10.1007/BF00926718