Table 1.
Information for the Mitochondrial Gene and Genome Sequences Used In This Study
| Taxon | Genome Size (bp) | Percent Exon | Percent Intron | GC Content | No. Protein Genesb | No. rRNAs | No. tRNAs | No. Introns | Culture Strain | GenBank Accession |
|---|---|---|---|---|---|---|---|---|---|---|
| Chattonella marinaa | 44,772 | 71.2 | 1.1 | 28.4 | 34 | 3 | 25 | 2 | KA11-m-1 | NC_013837 |
| Nannochloropsis oculataa | 40,721 | 80.5 | 6.0 | 32.2 | 35 | 2 | 26 | 1 | CCMP525 | KJ410688 |
| Triparma laevisa | 39,580 | 89.0 | 0.0 | 30.4 | 34 | 2 | 26 | 0 | NIES-2565 | NC_027747 |
| Toxarium undulatum | 36,667 | 95.0 | 0.0 | 30.4 | 34 | 2 | 23 | 0 | ECT3802 | MG271847 |
| Thalassiosira nordenskioeldii | NA | NA | NA | NA | NA | NA | NA | NA | CCMP992 | AB038235 |
| Skeletonema marinoi | 38,515 | 90.4 | 0.0 | 29.7 | 34 | 2 | 24 | 0 | JK029 | NC_028615 |
| Cyclotella cryptica | 58,021 | 60.0 | 4.0 | 30.8 | 34 | 2 | 24 | 1 | CCMP332 | – |
| Cyclotella nana | 43,827 | 79.5 | 5.3 | 30.1 | 34 | 2 | 25 | 1 | CCMP1335 | NC_007405 |
| Psammoneis japonica | 73,622 | 47.3 | 36.4 | 30.8 | 34 | 2 | 27 | 11 | ECT2AJA-110 | MG148339 |
| Ulnaria acus | 46,657 | 71.2 | 12.3 | 31.8 | 32 | 2 | 24 | 3 | – | NC_013710 |
| Asterionella formosa | 61,877 | 51.7 | 4.0 | 26.6 | 34 | 2 | 25 | 1 | – | NC_032029 |
| Eunotia naegelii | 48,049 | 71.7 | 1.4 | 27.1 | 33 | 2 | 23 | 1 | FD354 | MG271846 |
| Navicula ramosissima | 48,652 | 70.9 | 21.4 | 31.1 | 34 | 2 | 22 | 6 | TA439 | KX343079 |
| Phaeodactylum tricornutum | 77,356 | 45.2 | 8.7 | 35.0 | 34 | 2 | 25 | 4 | CCAP1055/1 | HQ840789 |
| Berkeleya fennica | 35,509 | 97.4 | 0.0 | 29.7 | 34 | 2 | 24 | 1 | TA424 | NC_026126 |
| Fistulifera solaris | 39,476 | 87.7 | 0.0 | 28.1 | 34 | 2 | 24 | 0 | – | NC_027978 |
| Cylindrotheca closterium | 37,784 | 92.9 | 6.2 | 32.1 | 34 | 2 | 25 | 1 | CCMP1855 | MG271845 |
| Fragiliariopsis cylindrus | 58,295 | 60.2 | 0.0 | 31.1 | 34 | 2 | 24 | 0 | CCMP1102 | – |
| Pseudo-nitzschia multiseries | 46,283 | 65.1 | 16.3 | 31.0 | 33 | 2 | 23 | 6 | – | NC_027265 |
| Nitzschia sp. | 36,221 | 96.6 | 0.0 | 28.8 | 34 | 2 | 25 | 0 | ECT2AJA-05 | MG182051 |
| Durinskia balticac | 35,505 | 97.8 | 0.0 | 31.0 | 34 | 2 | 24 | 0 | CSIRO CS-38 | JN378735 |
| Kryptoperidinium foliaceumc | 39,686 | 87.4 | 10.9 | 32.4 | 34 | 2 | 23 | 3 | CCMP1326 | JN378734 |
Note.—Taxa for which only introns were considered (Pseudo-nitzschia multiseries, Asterionella formosa, Thalassiosira nordenskioeldii, Chattonella marina, and Nannochloropsis oculata) are not included. Culture information was not available for some taxa. Percent exonic sequence includes protein-coding, rRNA, and tRNA genes.
a
Outgroup taxa.
b
Excluding intronic ORFs.
c
Diatom endosymbiont of a dinoflagellate.