Abstract
We present the mitochondrial genome of the deep-sea, epibenthic, irregular echinoid Echinocrepis rostrata, representing the first sequenced mitogenome of the order Holasteroida. The length of the complete E. rostrata mitochondrial genome is 15,716 base pairs, and its GC content is 34.87%. It contains 13 protein-coding genes, two rRNA genes, and 22 tRNA genes, whose order is identical to that of all other available echinoid mitogenomes. Phylogenetic analysis of available mitochondrial genomes, based on all coding loci, places E. rostrata as the sister group to spatangoids (heart urchins).
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