Circumstantial evidence of life history events in loricate choanoflagellates

Sex is found in all major eukaryotic groups of organisms. It has been known for some time that the choanoflagellates also possess the genes involved in meiosis and a full sexual cycle was also recently accounted for in Salpingoeca rosetta. With reference to the loricate choanoflagellates the current...

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Published inEuropean journal of protistology Vol. 58; pp. 26 - 34
Main Authors Thomsen, Helge Abildhauge, Østergaard, Jette Buch
Format Journal Article
LanguageEnglish
Published Germany Elsevier GmbH 01.04.2017
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Abstract Sex is found in all major eukaryotic groups of organisms. It has been known for some time that the choanoflagellates also possess the genes involved in meiosis and a full sexual cycle was also recently accounted for in Salpingoeca rosetta. With reference to the loricate choanoflagellates the current status is that only circumstantial evidence, from wild material of Bicosta spinifera, exists in favour of documenting division patterns that go beyond plain asexual division, and that has the potential to represent stages in a sexual life cycle. Here we present further evidence from wild material documenting possible morphotype changes that might similarly indicate the existence of complex life cycles. In this particular case, it revolves around the existence of so-called ‘combination loricas’ (i.e. two loricas that occur physically united), representing consistent species combinations from the genera Acanthocorbis and Stephanoeca.
AbstractList Sex is found in all major eukaryotic groups of organisms. It has been known for some time that the choanoflagellates also possess the genes involved in meiosis and a full sexual cycle was also recently accounted for in Salpingoeca rosetta. With reference to the loricate choanoflagellates the current status is that only circumstantial evidence, from wild material of Bicosta spinifera, exists in favour of documenting division patterns that go beyond plain asexual division, and that has the potential to represent stages in a sexual life cycle. Here we present further evidence from wild material documenting possible morphotype changes that might similarly indicate the existence of complex life cycles. In this particular case, it revolves around the existence of so-called ‘combination loricas’ (i.e. two loricas that occur physically united), representing consistent species combinations from the genera Acanthocorbis and Stephanoeca.
Author Thomsen, Helge Abildhauge
Østergaard, Jette Buch
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Cites_doi 10.1093/plankt/fbq137
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Keywords Loricate choanoflagellates
Life history
Combination lorica
Acanthocorbis
Stephanoeca
Language English
License Copyright © 2016 Elsevier GmbH. All rights reserved.
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Snippet Sex is found in all major eukaryotic groups of organisms. It has been known for some time that the choanoflagellates also possess the genes involved in meiosis...
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SubjectTerms Acanthocorbis
Choanoflagellata - growth & development
Combination lorica
Life Cycle Stages
Life history
Loricate choanoflagellates
Reproduction - physiology
Species Specificity
Stephanoeca
Title Circumstantial evidence of life history events in loricate choanoflagellates
URI https://dx.doi.org/10.1016/j.ejop.2016.12.004
https://www.ncbi.nlm.nih.gov/pubmed/28092805
https://search.proquest.com/docview/1861543501
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