Table 1.
List of species of Littorinimorpha analysed in this study and their GenBank accession numbers.
Fig 1.
Maps of the mitochondrial genomes of D. extinctorium.
Table 2.
Mitochondrial genome organization of D. extinctorium.
Fig 2.
Secondary structure of the tRNA genes in the mitogenome of D. extinctorium.
The tRNAs are labeled with the abbreviations of their corresponding amino acids. Blue dots indicate normal conditions and yellow dots indicate base mismatches.
Table 3.
Nucleotide contents of the coding and non-coding regions of the mitochondrial genome of D. extinctorium, indicating AT-, GC-skew ratios.
Fig 3.
Codon usage patterns in the mitogenome of D. extinctorium. CDspT, codons per thousand codons.
Codon families are provided on the x-axis (A) and the relative synonymous codon usage (RSCU) (B).
Table 4.
Relative synonymous codon usage (RSCU) in the mitogenomes of D. extinctorium.
Fig 4.
Comparison of mitochondrial gene rearrangements of the D. extinctorium.
The green squares represent PCGs, the yellow squares represent tRNAs, and the orange squares represent rRNAs. The position at the top indicates that it is encoded in the H chain, and the position at the bottom indicates that it is encoded in the L chain.
Fig 5.
The phylogenetic tree was inferred from the nucleotide sequences of 13 mitogenome PCGs using BI and ML methods.
Numbers on branches indicate posterior probability (BI) and bootstrap support (ML).