Main pathways of evolution of spermatozoa of acoelomorpha and free-living plathelminthes
© INVERTEBRATE ZOOLOGY, 2017.On the basis of original and literary data on ultrastructure of spermatozoa and their formation the reconstruction of main pathways of evolution of male gametes of Acoelomorpha and free-living Plathelminthes is proposed. Two species of Acoela — Archaphanostoma agile and...
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ftkazanuniv:oai:dspace.kpfu.ru:net/115161 2023-05-15T18:43:53+02:00 Main pathways of evolution of spermatozoa of acoelomorpha and free-living plathelminthes Shafigullina E. Zabotin Y. 2017 http://dspace.kpfu.ru/xmlui/handle/net/115161 unknown Invertebrate Zoology 1 59 14 http://dspace.kpfu.ru/xmlui/bitstream/net/115161/1/SCOPUS18129250-2017-14-1-SID85019745641-a1.pdf 1812-9250 http://dspace.kpfu.ru/xmlui/handle/net/115161 SCOPUS18129250-2017-14-1-SID85019745641 Acoelomorpha Phylogeny Plathelminthes Spermatozoa Ultrastructure Article 2017 ftkazanuniv 2022-01-01T09:39:50Z © INVERTEBRATE ZOOLOGY, 2017.On the basis of original and literary data on ultrastructure of spermatozoa and their formation the reconstruction of main pathways of evolution of male gametes of Acoelomorpha and free-living Plathelminthes is proposed. Two species of Acoela — Archaphanostoma agile and Convoluta convoluta — and five species of free-living flatworms from different taxa — Monocelis fusca, M. lineata (Proseriata), Uteriporus vulgaris (Tricladida, Maricola), Provortex karlingi (Rhabdocoela, Dalytyphloplanoida) and Macrorhynchus croceus (Rhabdocoela, Kalyptorhynchia) — have been investigated. Specimens were collected on the littoral zone of various islands of Keretskii Archipelago (White Sea), fixed in the 1% glutaraldehyde and studied with transmission electron microscope JEM 100 CX by the standard methodics. During the evolution of Acoela the axoneme formula of spermatozoa is modified and the position of free microtubules is reorganized. Evolutionary changes of spermatozoa of Plathelminthes are represented firstly by the locomotory apparatus (incorporation of flagellae, change of an axoneme formula and configurations of free microtubules), then by organization of nuclear material. And finally in specialized groups the oligomerization of mitochondria and additional inclusions occurs. In the spermiogenesis of Acoela and the advanced flatworms the specific peculiarities of ancestral forms, representing the examples of recapitulation on the cellular level, are described. The similarities and the differences of the sperm ultrastructure and spermiogenesis in Acoelomorpha and Plathelminthes are discussed in evolutionary-morphological aspect Article in Journal/Newspaper White Sea Kazan Federal University Digital Repository White Sea |
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Open Polar |
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Kazan Federal University Digital Repository |
op_collection_id |
ftkazanuniv |
language |
unknown |
topic |
Acoelomorpha Phylogeny Plathelminthes Spermatozoa Ultrastructure |
spellingShingle |
Acoelomorpha Phylogeny Plathelminthes Spermatozoa Ultrastructure Shafigullina E. Zabotin Y. Main pathways of evolution of spermatozoa of acoelomorpha and free-living plathelminthes |
topic_facet |
Acoelomorpha Phylogeny Plathelminthes Spermatozoa Ultrastructure |
description |
© INVERTEBRATE ZOOLOGY, 2017.On the basis of original and literary data on ultrastructure of spermatozoa and their formation the reconstruction of main pathways of evolution of male gametes of Acoelomorpha and free-living Plathelminthes is proposed. Two species of Acoela — Archaphanostoma agile and Convoluta convoluta — and five species of free-living flatworms from different taxa — Monocelis fusca, M. lineata (Proseriata), Uteriporus vulgaris (Tricladida, Maricola), Provortex karlingi (Rhabdocoela, Dalytyphloplanoida) and Macrorhynchus croceus (Rhabdocoela, Kalyptorhynchia) — have been investigated. Specimens were collected on the littoral zone of various islands of Keretskii Archipelago (White Sea), fixed in the 1% glutaraldehyde and studied with transmission electron microscope JEM 100 CX by the standard methodics. During the evolution of Acoela the axoneme formula of spermatozoa is modified and the position of free microtubules is reorganized. Evolutionary changes of spermatozoa of Plathelminthes are represented firstly by the locomotory apparatus (incorporation of flagellae, change of an axoneme formula and configurations of free microtubules), then by organization of nuclear material. And finally in specialized groups the oligomerization of mitochondria and additional inclusions occurs. In the spermiogenesis of Acoela and the advanced flatworms the specific peculiarities of ancestral forms, representing the examples of recapitulation on the cellular level, are described. The similarities and the differences of the sperm ultrastructure and spermiogenesis in Acoelomorpha and Plathelminthes are discussed in evolutionary-morphological aspect |
format |
Article in Journal/Newspaper |
author |
Shafigullina E. Zabotin Y. |
author_facet |
Shafigullina E. Zabotin Y. |
author_sort |
Shafigullina E. |
title |
Main pathways of evolution of spermatozoa of acoelomorpha and free-living plathelminthes |
title_short |
Main pathways of evolution of spermatozoa of acoelomorpha and free-living plathelminthes |
title_full |
Main pathways of evolution of spermatozoa of acoelomorpha and free-living plathelminthes |
title_fullStr |
Main pathways of evolution of spermatozoa of acoelomorpha and free-living plathelminthes |
title_full_unstemmed |
Main pathways of evolution of spermatozoa of acoelomorpha and free-living plathelminthes |
title_sort |
main pathways of evolution of spermatozoa of acoelomorpha and free-living plathelminthes |
publishDate |
2017 |
url |
http://dspace.kpfu.ru/xmlui/handle/net/115161 |
geographic |
White Sea |
geographic_facet |
White Sea |
genre |
White Sea |
genre_facet |
White Sea |
op_source |
SCOPUS18129250-2017-14-1-SID85019745641 |
op_relation |
Invertebrate Zoology 1 59 14 http://dspace.kpfu.ru/xmlui/bitstream/net/115161/1/SCOPUS18129250-2017-14-1-SID85019745641-a1.pdf 1812-9250 http://dspace.kpfu.ru/xmlui/handle/net/115161 |
_version_ |
1766234417559240704 |