The earliest diverging extant scleractinian corals recovered by mitochondrial genomes

Evolutionary reconstructions of scleractinian corals have a discrepant proportion of zooxanthellate reef-building species in relation to their azooxanthellate deep-sea counterparts. In particular, the earliest diverging “Basal” lineage remains poorly studied compared to “Robust” and “Complex” corals...

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Vydané v:Scientific Reports Ročník 10; číslo 1; s. 20714
Hlavní autori: Seiblitz, Isabela G. L., Capel, Kátia C. C., Stolarski, Jarosław, Quek, Zheng Bin Randolph, Huang, Danwei, Kitahara, Marcelo V.
Médium: Journal Article
Jazyk:English
Vydavateľské údaje: London Springer Science and Business Media LLC 26.11.2020
Nature Publishing Group UK
Nature Publishing Group
Predmet:
631/181
631/208/212/2306
Animals
Anthozoa
Anthozoa - genetics
Biological Evolution
Coral Reefs
Corals
Deep sea
Genes, Mitochondrial
Genes, Mitochondrial - genetics
Genome, Mitochondrial
Genome, Mitochondrial - genetics
Genomes
Humanities and Social Sciences
Invertebrates
Micrabaciidae
Mitochondria
multidisciplinary
Ordovician
Phylogeny
Science
Science (multidisciplinary)
Scleractinia
Topology
ISSN:2045-2322, 2045-2322
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Shrnutí:Evolutionary reconstructions of scleractinian corals have a discrepant proportion of zooxanthellate reef-building species in relation to their azooxanthellate deep-sea counterparts. In particular, the earliest diverging “Basal” lineage remains poorly studied compared to “Robust” and “Complex” corals. The lack of data from corals other than reef-building species impairs a broader understanding of scleractinian evolution. Here, based on complete mitogenomes, the early onset of azooxanthellate corals is explored focusing on one of the most morphologically distinct families, Micrabaciidae. Sequenced on both Illumina and Sanger platforms, mitogenomes of four micrabaciids range from 19,048 to 19,542 bp and have gene content and order similar to the majority of scleractinians. Phylogenies containing all mitochondrial genes confirm the monophyly of Micrabaciidae as a sister group to the rest of Scleractinia. This topology not only corroborates the hypothesis of a solitary and azooxanthellate ancestor for the order, but also agrees with the unique skeletal microstructure previously found in the family. Moreover, the early-diverging position of micrabaciids followed by gardineriids reinforces the previously observed macromorphological similarities between micrabaciids and Corallimorpharia as well as its microstructural differences with Gardineriidae. The fact that both families share features with family Kilbuchophylliidae ultimately points towards a Middle Ordovician origin for Scleractinia.
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ISSN:2045-2322
2045-2322
DOI:10.1038/s41598-020-77763-y