Table 1.

Characteristics of Synurophyceae plastid genomes analyzed in this study

General characteristics	Synura petersenii S114.C7, CZ	Synura sphagnicola FBCC200022	Synura uvella FBCC200023	Mallomonas splendens CCMP1872	Neotessella volvocina CCMP1871	Ochromonas species CCMP1393
Key characteristics for genus classification	colonized cells covered with silica scale on each cell	colonized cells covered with silica scale on each cell	colonized cells covered with silica scale on each cell	single cell covered with silica scale	colonized cells covered with silica scale on colony	naked single cell
Size (bp)	133,059	129,699	133,257	146,918	130,705	126,746
Inverted repeat (IR)	23,151	22,505	23,691	31,611	24,064	22,906
Small single-copy region	1,135	1,191	2,939	711	2,432	805
Large single-copy region	85,622	83,498	82,936	82,985	80,145	80,129
G+C (%)	37.89	38.76	38.19	42.39	37.54	30.9
Total gene (include RNAs)	182	181	189	187	186	183
No. of protein-coding genes	144	144	151	150	149	144
tRNAs	34	33	34	33	33	33
rRNA operons	2	2	2	2	2	2
Introns	trnL	trnL	trnL	trnL	trnP, trnS	-
Unknown ORFs	8	3	9	11	9	7
pseudogene	-	-	trnR	trnR	trnE	-
partial copied gene	-	dnaK	-	-	dnaK	-
specific encoded genes	dnaB/ cemA	dnaB/ cemA	dnaB/ cemA	dnaB/ cemA	cemA	-
missing gene	syfB	syfB	-	-	-	-
GenBank accession	MH795128	MH795129	MH795130	MH795131	MH795132	KJ877675