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Ultrastructure of spermatozoa and female copulatory organs in preferably asexually-reproducing acoel Convolutriloba retrogemma (Acoelomorpha)

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dc.contributor.author Zabotin Y.I.
dc.contributor.author Evtugyn V.G.
dc.date.accessioned 2021-02-25T20:35:17Z
dc.date.available 2021-02-25T20:35:17Z
dc.date.issued 2020
dc.identifier.issn 0720-213X
dc.identifier.uri https://dspace.kpfu.ru/xmlui/handle/net/161879
dc.description.abstract © 2020, Springer-Verlag GmbH Germany, part of Springer Nature. Acoela (Acoelomorpha) represents one of the most spectacular animal taxa with debatable phylogenetic position. Particularly, acoel genus Convolutriloba is of special interest due to the inhabitance mostly in marine aquaria and the development of unique ways of asexual reproduction, while the sexual one is rarely described. The aim of the present work is the ultrastructural investigation of reproductive system in preferably asexually-reproducing acoel Convolutriloba retrogemma, type species of the genus. In all specimens studied, the oocytes were absent, despite the spermatozoa and female copulatory organs (seminal bursa with mouthpiece) were being fully developed. The spermatozoon of C. retrogemma represents an elongated filiform cell with a pair of incorporated axonemes with a formula 9 + 0, axial microtubules and three types of cytoplasmic inclusions. The bursa mouthpiece is composed of matrix cells with the electron-dense sclerotized core surrounding the lumen, and electron-transparent periphery containing most cell organelles, as well as the intercalary (glandular) cells between them. In all individuals studied by electron microscopy, the lumen of the mouthpiece is always locked with a “plug” composed of various cellular elements, including the sclerotized actin fibers, preventing the insemination. The comparative morphology of the reproductive system of Convolutriloba and evolutionary role of asexual reproduction within this genus are discussed.
dc.relation.ispartofseries Zoomorphology
dc.subject Acoela
dc.subject Acoelomorpha
dc.subject Asexual reproduction
dc.subject Bursa mouthpiece
dc.subject Reproductive system
dc.subject Spermatozoon
dc.subject Ultrastructure
dc.title Ultrastructure of spermatozoa and female copulatory organs in preferably asexually-reproducing acoel Convolutriloba retrogemma (Acoelomorpha)
dc.type Article
dc.collection Публикации сотрудников КФУ
dc.source.id SCOPUS0720213X-2020-SID85095788839


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  • Публикации сотрудников КФУ Scopus [24551]
    Коллекция содержит публикации сотрудников Казанского федерального (до 2010 года Казанского государственного) университета, проиндексированные в БД Scopus, начиная с 1970г.

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