Parvularcula flava
was proposed as a novel member of genus
Parvularcula
in 2016. Some time earlier,
Aquisalinus flavus
has been proposed as a novel species of a novel genus named
Aquisalinus
. When comparing the 16S rRNA gene sequences of type strains
P. flava
NH6-79T and
A. flavus
D11M-2T, they showed 97.9 % sequence identity, much higher than the sequence identities 92.7–94.3 % between
P. flava
NH6-79T and type strains in the genus
Parvularcula
, indicating that the later proposed novel taxon
Parvularcula flava
need reclassification. The phylogenetic trees based on 16S rRNA gene sequences and genome sequences both showed that
P. flava
NH6-79T and
A. flavus
D11M-2T formed a separated branch away from strains in the genera
Parvularcula
,
Marinicaulis
and
Amphiplicatus
. The average amino acid identity and average nucleotide identity values of
P. flava
NH6-79T and
A. flavus
D11M-2T were 87.9 and 85.0 %, respectively, much higher than the values between
P. flava
NH6-79T and other closely related type strains (54.3 %–58.1 % and 68.6–70.4 %, respectively).
P. flava
NH6-79T and
A. flavus
D11M-2T also contained summed feature 8 (C18 : 1
ω6c and/or C18 : 1
ω7c) and C16 : 0 as major fatty acids, distinguishing them from other closely related taxa. Based on the results of the phylogenetic, comparative genomic and phenotypic analyses,
Parvularcula flava
should be reclassified as Aquisalinus luteolus nom. nov. and the description of genus
Aquisalinus
is emended.
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