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Phylogenomics of enigmatic crustacean y-larvae reveals multiple origins of parasitism in barnaclesстатья Исследовательская статья
Статья опубликована в высокорейтинговом журнале
Статья опубликована в журнале из списка Web of Science и/или Scopus- Авторы: Dreyer Niklas, Bernot James P., Olesen Jørgen, Kolbasov Gregory A., Høeg Jens Thorvald, Machida Ryuji J., Chan Benny K.K
- Журнал: Current Biology
- Том: 35
- Год издания: 2025
- Издательство: Cell Press
- Местоположение издательства: United States
- Первая страница: 3356
- Последняя страница: 3367
- DOI: 10.1016/j.cub.2025.06.007
- Аннотация: The deeper relationships of major thecostracan (barnacles sensu lato) groups remain contentious due to alack of genome-scale data of enigmatic lineages. Commonly referred to as y-larvae, Facetotecta is onesuch example. The group remains one of the few invertebrate groups without known adult stages and almostentirely obscured biodiversity. Here, we obtained the first metatranscriptome of Facetotecta (comprising∼3,600 pooled y-larvae), sequenced with real-time, single-molecule isoform sequencing. By combining thesedata with a taxon-dense, genome-scale data matrix of Pancrustacea, we take a tree-based approach to ortholog identification and place this enigmatic group among other crustaceans. Taking the same approach on a taxonomically narrower matrix comprising malacostracan outgroups and 14 representatives of Thecostraca, we obtain congruent results with almost ten times the number of orthologs. Combined with new ultrastructural evidence on the host attachment system in y-larvae, our data compellingly demonstrate that Facetotecta constitute an early-diverging sister group to Cirripedia and that parasitism, including the termination of the planktonic life cycle in amoeboid, unarthropodal stages, evolved convergently and independently between this group and the parasitic barnacles, Rhizocephala. Finally, to overcome issues inherent in our limited, single-taxon sampling of Facetotecta in the phylogenomic analyses, we use hundreds of vetted y-larva Sanger sequences across five marker genes to robustly estimate a phylogeny of Thecostraca. This convincingly supports the monophyly of Facetotecta and its sister relationship with Cirripedia. Taken together, these exercises allow us to resolve the position of Facetotecta compellingly and take us one step closer to understanding how parasitism evolved in this fascinating group of crustaceans.
- Добавил в систему: Колбасов Григорий Александрович
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