Structure of the envelopes that are formed around metacercariae of the trematode Podocotyle atomon (Rudolphi, 1802) in its second intermediate host
Abstract
We assessed the structure of Podocotyle atomon metacercariae cysts and their surrounding capsules in the trematodeʼs second intermediate hosts – Locustogammarus locustoides (Brandt, 1851) and Spinulogammarus ochotensis (Brandt, 1851) – using light and transmission electron microscopy. The cysts, which are synthesized from materials secreted by the parasite tegument, exhibited a single, amorphous layer. The capsules formed by the host consisted of two layers: an electron-light, loose inner layer and an electron-dark, unstructured outer layer, which incorporated a small amount of intact and fragmented host cells. The inner capsule layer may have been formed by degeneration and transformation of the amphipodʼs muscle tissue that surrounds the larva. The outer layer of the capsule appeared to contain pigment deposits.
About the Author
E. M. Skorobrekhova
Institute of Biological Problems of the North, Far Eastern Branch of the Russian Academy of Sciences
Russian Federation
Portovaya str., 18, Magadan, 685000
Russian Federation
Portovaya str., 18, Magadan, 685000
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Review
For citations:
Skorobrekhova E.M. Structure of the envelopes that are formed around metacercariae of the trematode Podocotyle atomon (Rudolphi, 1802) in its second intermediate host. Vestnik Moskovskogo universiteta. Seriya 16. Biologiya. 2020;75(4):285-290. (In Russ.)
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