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"Radice, Katharine"
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The Classical Tradition
The book The Classical Tradition edited by A. Grafton, G. W. Most and S. Settis is reviewed.
Book Review
Global phylogenomic assessment of Leptoseris and Agaricia reveals substantial undescribed diversity at mesophotic depths
Mesophotic coral communities are increasingly gaining attention for the unique and distinct biological species they host, exemplified by the numerous mesophotic fish species that continue to be discovered. In contrast, many of the photosynthetic scleractinian corals observed at mesophotic depths are assumed to be depth-generalists, with very few species characterised as mesophotic-specialists. This presumed lack of a specialised community remains largely untested, as phylogenetic studies rarely include mesophotic samples, and have long suffered from resolution issues associated with traditional sequence markers. Here, we used reduced-representation genome sequencing to provide a phylogenomic assessment of two dominant mesophotic genera of plating corals in the Indo-Pacific and Western Atlantic, respectively, Leptoseris and Agaricia. While these genome-wide phylogenies broadly corroborated the morphological taxonomy, they also exposed substantial undescribed diversity (at least 24 molecular clades across the 8 species), including deep divergences within both genera and within current taxonomic species. Five of the eight focal species consisted of at least two sympatrically-occurring, genetically distinct clades, identified consistently across methods. The repeated observation of genetically divergent clades associated with mesophotic depths highlights that there are many more mesophotic-specialist coral species than currently acknowledged, and that an urgent assessment of this largely unstudied biological diversity is warranted. Competing Interest Statement The authors have declared no competing interest. Footnotes * Author affiliations updated
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