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Article

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Accepted version

Publication date

2016

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Please use this identifier to cite or link to this item: https://hdl.handle.net/2445/166837

Functional ultrastructure of eggs and cellular organization of hexacanths of the cyclophyllidean cestode Thysanotaenia congolensis: a phylogenetic implication of obtained results

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Volume Title

Related resource

https://doi.org/10.1017/S0031182015001560

Abstract

The functional ultrastructure of eggs and cellular organization of hexacanths from gravid proglottids of Thysanotaenia congolensis, from black rats from Cape Verde, were examined by transmission electron microscopy. Mature eggs with fully formed hexacanths are grouped within parenchymatous capsules of gravid proglottids. Oncospheral envelopes surrounding mature hexacanths are reduced to a very thin membranous embryophore as their protective function is taken over by the parenchymatous capsules originating from the medullary parenchyma of immature proglottids and composed of three layers. Six major cell types are present: a bi-nucleate medullary centre; a six-nucleate U-shaped penetration gland; a second type of penetration gland; two neurosecretory-type nerve cells; about 30 somatic cells; and about 12 germinative cells. Present results on the functional ultrastructure of eggs and cellular organization of hexacanths support the phylogenetic distinction between T. congolensis and cestodes of the subfamily Anoplocephalinae. Keywords: Thysanotaenia congolensis; cellular organization of hexacanth; functional ultrastructure of eggs; ultrastructural evidences for davaineid characters.

Subject

Ou (Biologia), Ultraestructura (Biologia), Parasitologia, Cestodes

Subject (English)

Egg (Biology), Ultrastructure (Biology), Parasitology, Tapeworms

Citation

Collections

Articles publicats en revistes (Biologia, Sanitat i Medi Ambient)

Citation

SWIDERSKI, Zdzislaw, MIQUEL COLOMÉ, Jordi and CONN, David Bruce. Functional ultrastructure of eggs and cellular organization of hexacanths of the cyclophyllidean cestode Thysanotaenia congolensis: a phylogenetic implication of obtained results. Parasitology. 2016. Vol. 143, num. 3, pags. 320-333. ISSN 0031-1820. [consulted: 10 of June of 2026]. Available at: https://hdl.handle.net/2445/166837

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