Bibliography and Index of the Sirenia and Desmostylia  

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"Laudisoit, Anne"

 
 
 Souza, Érica Martinha Silva de; Freitas, Lucas; Ramos, Elisa Karen da Silva; Veiga, Giovanna Selleghin; Rachid-Ribeiro, Michelle Carneiro; Silva, Felipe André; Marmontel, Miriam; Santos, Fabrício Rodrigues dos; Laudisoit, Anne; Verheyen, Erik; Domning, Daryl Paul; Nery, Mariana Freitas (detail)
   
2021
The evolutionary history of manatees told by their mitogenomes.
Scientific Reports 11: 3564. 2 tabs. 5 figs. + online supplementary material. https://doi.org/10.1038/s41598-021-82390-2
–ABSTRACT: The manatee family encompasses three extant congeneric species: Trichechus senegalensis (African manatee), T. inunguis (Amazonian manatee), and T. manatus (West Indian manatee). The fossil record for manatees is scant, and few phylogenetic studies have focused on their evolutionary history. We use full mitogenomes of all extant manatee species to infer the divergence dates and biogeographical histories of these species and the effect of natural selection on their mitogenomes. The complete mitochondrial genomes of T. inunguis (16,851 bp), T. senegalensis (16,882 bp), and T. manatus(16,882 bp), comprise 13 protein-coding genes, 2 ribosomal RNA genes (rRNA - 12S and 16S), and 22 transfer RNA genes (tRNA), and (D-loop/CR). Our analyses show that the first split within Trichechus occurred during the Late Miocene (posterior mean 6.56 Ma and 95% HPD 3.81–10.66 Ma), followed by a iversifcation event in the Plio-Pleistocene (posterior mean 1.34 Ma, 95% HPD 0.1–4.23) in the clade composed by T. inunguis and T. manatus; T. senegalensis is the sister group of this clade with higher support values (pp> 0.90). The branch-site test identifed positive selection on T. inunguis in the 181st position of the ND4 amino acid gene (LRT= 6.06, p = 0.0069, BEB posterior probability = 0.96). The ND4 gene encodes one subunit of the NADH dehydrogenase complex, part of the oxidative phosphorylation machinery. In conclusion, our results provide novel insight into the evolutionary history of the Trichechidae during the Late Miocene, which was influenced by geological events, such as Amazon Basin formation.
Daryl P. Domning, Research Associate, Department of Paleobiology, National Museum of Natural History, Smithsonian Institution, Washington, D.C. 20560, and Laboratory of Evolutionary Biology, Department of Anatomy, College of Medicine, Howard University, Washington, D.C. 20059.
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