(B) Operculum becoming visible as the egg develops (← Op).
(C) A residual structure on the non-opercular side of the egg.
(D) An empty egg shell after the oncomiracidium has left.
(E) Egg shell indicating the thickness of an individual parasite egg shell at the opercular opening.
Date
Source
Theunissen, M., Tiedt, L. & Du Preez, L. H. 2014: The morphology and attachment of Protopolystoma xenopodis (Monogenea: Polystomatidae) infecting the African clawed frog Xenopus laevis. Parasite, 21, 20. doi:10.1051/parasite/2014020
Author
Maxine Theunissen, Louwrens Tiedt and Louis H. Du Preez
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