Complete mitogenomes of the marine picoplanktonic green algae Prasinoderma sp. MBIC 10622 and Prasinococcus capsulatus CCMP 1194 (Palmophyllophyceae)

Marine picoalgae from the Prasinococcales order occupy the deepest branch of the Chlorophyta (Palmophyllophyceae). Here, we describe the mitogenomes of Prasinoderma sp. MBIC 10622 and Prasinococcus capsulatus CCMP 1194. At 37,590 and 41,006 bp, respectively, they are smaller than their Prasinoderma coloniale homolog and unlike the latter, lack an inverted repeat. The intronless Prasinoderma sp. mitogenome possesses the largest gene repertoire (68) among all chlorophytes examined to date. At the gene order level, it displays more ancestral traits than its prasinococcalean homologs, closely resembling the mitogenomes of Mamiellophyceae. Remarkably, the P. capsulatus mitogenome features a trans-spliced group II intron.