Here, we provide the first complete mitochondrial genomes for two higher taxa of Peracarida, Lophogastrida and Stygiomysida. We examined Lophogaster typicus as a representative Spelaeomysis bottazzii Both mitogenomes have all typical metazoan genes (13 protein-coding genes, ribosomal RNA 22 transfer RNAs). The length 15,076 bp in L. 14,806 S. bottazzii. Gene order differs markedly from hypothet...