Abstract
The sea star Echinaster (Othilia) brasiliensis is frequently found in coral reef habitats, but can also occur in sandy and rocky bottoms. Anthropogenic pressure on these ecosystems led this species to a vulnerable conservation status. Here, the completed mitochondrial genome of E. (O) brasiliensis was described for the first time, representing the eighth to the class Asteroidea and the first to the order Spinulosida. The mitogenome is 16,219 bp in length and contains 13 protein-coding regions, two rRNAs, 22 tRNAs and one non-coding control region. The overall nucleotide composition is 35.8% A, 25.8% T, 26.4% C and 11.9% G. The gene order is consistent to the other Asteroidea species. The maximum likelihood phylogeny recovered E. (O.) brasiliensis within Asteroidea clade as sister group of the clade with representatives of the Paxillosida and Valvatida orders.
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