Figure 1.

Mitochondrial contig profile. The coverage and length profile of contigs from 196 assemblies newly sequenced in (Shen et al., 2018) that were flagged as putative mitochondrial contigs versus all other contigs is displayed (log₁₀ scaling). The most useful mitochondrial contigs generally have a profile of elevated coverage with sizes between 10 and 100 kb, a combination rarely found in other contigs, although strict diagnostic cutoffs are not evident. Many poor-quality putative mitochondrial contigs were found in nuclear genome assemblies, but these were not present in mitochondrially-focused reassemblies.