A Gram-positive bacterium, designated strain Kis4-19
T, was isolated from the intestinal tract of a fish, and its taxonomic position was investigated by a polyphasic approach. The cells of strain Kis4-19
T were coccus-shaped, non-motile and non-sporulating. The peptidoglycan type of this organism was A3γ;
LL-diaminopimeric acid (
LL-A
2pm) was the diagnostic diamino acid of the peptidoglycan. The predominant menaquinone was MK-8(H
4), and the major fatty acids were iso-C
15:0, iso-C
14:0 and iso-C
16:0. Galactose was detected as a cell-wall sugar. The polar lipids were diphosphatidylglycerol, phosphatidylglycerol, phosphatidylinositol and lyso-phosphatidylethanolamine. The DNA G+C content was 71.1 mol%. Sequencing analysis of the 16S rRNA gene indicated that strain Kis4-19
T was closely related to
Arsenicicoccus bolidensis CCUG 47306
T (97.5%). However, DNA–DNA hybridization results and phenotypic characteristics revealed that the strain Kis4-19
T differed from
A. bolidensis. Therefore, strain Kis4-19
T represents a novel species of the genus
Arsenicicoccus, for which the name
Arsenicicoccus piscis sp. nov. is proposed. The type strain is Kis4-19
T (=NBRC 105830
T =DSM 22760
T).
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