Parvatrema spp. (Digenea, Gymnophallidae) with parthenogenetic metacercariae: diversity, distribution and host specificity in the palaearctic.
There are several species of gymnophallid digeneans in the genus Parvatrema that are unique in developing metacercariae that reproduce by parthenogenesis in the second intermediate host. Transmission of these digeneans takes place in coastal ecosystems of the North Pacific and North Atlantic seas. T...
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Online Access: | https://doi.org/10.1016/j.ijpara.2024.02.002 https://pubmed.ncbi.nlm.nih.gov/38452965 |
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ftpubmed:38452965 2024-06-23T07:55:05+00:00 Parvatrema spp. (Digenea, Gymnophallidae) with parthenogenetic metacercariae: diversity, distribution and host specificity in the palaearctic. Galaktionov, Kirill V Gonchar, Anna Postanogova, Daria Miroliubov, Aleksei Bodrov, Semen Yu 2024 Jun https://doi.org/10.1016/j.ijpara.2024.02.002 https://pubmed.ncbi.nlm.nih.gov/38452965 eng eng Elsevier Science https://doi.org/10.1016/j.ijpara.2024.02.002 https://pubmed.ncbi.nlm.nih.gov/38452965 Copyright © 2024 Australian Society for Parasitology. Published by Elsevier Ltd. All rights reserved. Int J Parasitol ISSN:1879-0135 Volume:54 Issue:7 Geographical expansion Host colonisation Parthenogenetic metacercariae Speciation Transmission Unique life cycle Journal Article Review 2024 ftpubmed https://doi.org/10.1016/j.ijpara.2024.02.002 2024-06-13T16:02:00Z There are several species of gymnophallid digeneans in the genus Parvatrema that are unique in developing metacercariae that reproduce by parthenogenesis in the second intermediate host. Transmission of these digeneans takes place in coastal ecosystems of the North Pacific and North Atlantic seas. The first intermediate hosts are bivalves, the second ones are gastropods, and the definitive hosts are migratory birds. We integrated data accumulated over 25 years of research and differentiated a complex of five closely related species. They differ in the molluscan second intermediate hosts, distribution ranges, and life cycles patterns. The type I life cycle includes two generations of parthenogenetic metacercariae, followed by development of metacercariae which are invasive for the definitive host. In the type II life cycle, the number of generations of parthenogenetic metacercariae is unlimited, and they can also produce cercariae. These cercariae emerge into the environment and can infect new individuals of the second intermediate host. We conclude that the type I life cycle is a derived option that has evolved as a better fit to transmission in the unstable conditions in the intertidal zone. Another evolutionary trend in Parvatrema is transition from inhabiting the extrapallial space of the gastropod second intermediate host to endoparasitism in its mantle and internal organs. rDNA sequence analysis highlighted that Parvatrema spp. with parthenogenetic metacercariae form a monophyletic clade and suggested the Pacific origin of the group, with two transfers to the North Atlantic and colonisation of new second intermediate host species. Apparently the group formed in the late Pliocene-Pleistocene and diversified as a result of recurrent isolation in inshore refugia during glacial periods. We argue that parthenogenetic metacercariae in Parvatrema may serve as a model for early digenean evolution, demonstrating the first steps of adopting the molluscan first intermediate host and becoming tissue parasites. Article in Journal/Newspaper North Atlantic PubMed Central (PMC) Pacific International Journal for Parasitology |
institution |
Open Polar |
collection |
PubMed Central (PMC) |
op_collection_id |
ftpubmed |
language |
English |
topic |
Geographical expansion Host colonisation Parthenogenetic metacercariae Speciation Transmission Unique life cycle |
spellingShingle |
Geographical expansion Host colonisation Parthenogenetic metacercariae Speciation Transmission Unique life cycle Galaktionov, Kirill V Gonchar, Anna Postanogova, Daria Miroliubov, Aleksei Bodrov, Semen Yu Parvatrema spp. (Digenea, Gymnophallidae) with parthenogenetic metacercariae: diversity, distribution and host specificity in the palaearctic. |
topic_facet |
Geographical expansion Host colonisation Parthenogenetic metacercariae Speciation Transmission Unique life cycle |
description |
There are several species of gymnophallid digeneans in the genus Parvatrema that are unique in developing metacercariae that reproduce by parthenogenesis in the second intermediate host. Transmission of these digeneans takes place in coastal ecosystems of the North Pacific and North Atlantic seas. The first intermediate hosts are bivalves, the second ones are gastropods, and the definitive hosts are migratory birds. We integrated data accumulated over 25 years of research and differentiated a complex of five closely related species. They differ in the molluscan second intermediate hosts, distribution ranges, and life cycles patterns. The type I life cycle includes two generations of parthenogenetic metacercariae, followed by development of metacercariae which are invasive for the definitive host. In the type II life cycle, the number of generations of parthenogenetic metacercariae is unlimited, and they can also produce cercariae. These cercariae emerge into the environment and can infect new individuals of the second intermediate host. We conclude that the type I life cycle is a derived option that has evolved as a better fit to transmission in the unstable conditions in the intertidal zone. Another evolutionary trend in Parvatrema is transition from inhabiting the extrapallial space of the gastropod second intermediate host to endoparasitism in its mantle and internal organs. rDNA sequence analysis highlighted that Parvatrema spp. with parthenogenetic metacercariae form a monophyletic clade and suggested the Pacific origin of the group, with two transfers to the North Atlantic and colonisation of new second intermediate host species. Apparently the group formed in the late Pliocene-Pleistocene and diversified as a result of recurrent isolation in inshore refugia during glacial periods. We argue that parthenogenetic metacercariae in Parvatrema may serve as a model for early digenean evolution, demonstrating the first steps of adopting the molluscan first intermediate host and becoming tissue parasites. |
format |
Article in Journal/Newspaper |
author |
Galaktionov, Kirill V Gonchar, Anna Postanogova, Daria Miroliubov, Aleksei Bodrov, Semen Yu |
author_facet |
Galaktionov, Kirill V Gonchar, Anna Postanogova, Daria Miroliubov, Aleksei Bodrov, Semen Yu |
author_sort |
Galaktionov, Kirill V |
title |
Parvatrema spp. (Digenea, Gymnophallidae) with parthenogenetic metacercariae: diversity, distribution and host specificity in the palaearctic. |
title_short |
Parvatrema spp. (Digenea, Gymnophallidae) with parthenogenetic metacercariae: diversity, distribution and host specificity in the palaearctic. |
title_full |
Parvatrema spp. (Digenea, Gymnophallidae) with parthenogenetic metacercariae: diversity, distribution and host specificity in the palaearctic. |
title_fullStr |
Parvatrema spp. (Digenea, Gymnophallidae) with parthenogenetic metacercariae: diversity, distribution and host specificity in the palaearctic. |
title_full_unstemmed |
Parvatrema spp. (Digenea, Gymnophallidae) with parthenogenetic metacercariae: diversity, distribution and host specificity in the palaearctic. |
title_sort |
parvatrema spp. (digenea, gymnophallidae) with parthenogenetic metacercariae: diversity, distribution and host specificity in the palaearctic. |
publisher |
Elsevier Science |
publishDate |
2024 |
url |
https://doi.org/10.1016/j.ijpara.2024.02.002 https://pubmed.ncbi.nlm.nih.gov/38452965 |
geographic |
Pacific |
geographic_facet |
Pacific |
genre |
North Atlantic |
genre_facet |
North Atlantic |
op_source |
Int J Parasitol ISSN:1879-0135 Volume:54 Issue:7 |
op_relation |
https://doi.org/10.1016/j.ijpara.2024.02.002 https://pubmed.ncbi.nlm.nih.gov/38452965 |
op_rights |
Copyright © 2024 Australian Society for Parasitology. Published by Elsevier Ltd. All rights reserved. |
op_doi |
https://doi.org/10.1016/j.ijpara.2024.02.002 |
container_title |
International Journal for Parasitology |
_version_ |
1802647508131774464 |