The Sorex araneus (common shrew), a member of the Soricidae family, is the most common shrew throughout Northern Europe. The region includes Great Britain, but excludes Ireland. Herein, we first publish the complete mitochondrial genome of S. araneus. The mitogenome is 16 887 bp in length, which contains 24 tRNA genes, 13 protein-coding genes, 2 rRNA genes and a control region. The overall GC content is 38.28%, which is lower than AT. To verify the accuracy and utility of new determined mitogenome sequences, a species phylogenetic tree is constructed based on the complete mitogenomes of the species and other 10 close species. The current data provide important resources for the research of S. araneus mitochondrial evolution and the species identification.

The White-throated Tinamou, Tinamus guttatus (Tinamiformes, Tinamidae) is a species of the family Tinamidae. Herein, we firstly reported the complete mitochondrial genome of White-throated Tinamou. The length of mitogenome was 16 750 bp, and composed of 13 protein-coding genes, 22 tRNA genes, 2 rRNA genes, and 1 putative misc-feature region. Most protein-coding genes started with a traditional ATG codon, but specially, COX1 and COX2 initiated with an infrequent start codon GTG instead, ND3 and ND5 initiated with ATA instead. Protein-coding genes terminated with the mitochondria stop codon (TAA/TAG/AGG/AGA) or a single base(A/T). The mitogenome structural organization was identical to the closely related species Tinamus major. The GC content was 42.66%. To verify the accuracy and utility of new determined mitogenome sequences, we constructed the species phylogenetic tree with the 12 protein-coding genes of Tinamus guttatus together with nine other closely species. We expected that using the full mitogenome to address taxonomic issues and study the related evolution events.

The Downy woodpecker (Picoides pubescens) is a species of woodpecker which is the smallest in North America. This present study firstly reported the complete mitochondrial genome of downy woodpecker. We performed assembly of mitogenome structural by SPAdes and the Picidae species Dryocopus pileatus act as a reference. The mitogenome was 16 840 bp in length, which contains 13 protein-coding genes, 22 transfer RNAs, 2 ribosomal RNAs and 1 putative misc-feature region. The overall AT content is 52.76% which is higher than GC. To approve the accuracy of new determined mitogenome sequences, a phylogenetic tree of downy woodpecker together with other nine closely species was established by 12 protein-coding genes. This first complete mitogenome of Picoides species will contribute to identify species and study the related evolution events.