Enterococcus florum sp. nov., isolated from a cotton flower (Gossypium hirsutum L.).

A Gram-stain-positive and catalase negative coccus, designated strain Gos25-1T, isolated from a cotton flower (Gossypium hirsutum L.) collected from Khao Wong district, Kalasin province, Thailand. The taxonomic position of this strain was systematically studied based upon polyphasic taxonomic methods. The strain was facultatively anaerobic and produced l-lactic acid from glucose. The predominant cellular fatty acids were the straight-chain fatty acids C18 : 1ω9c and C16 : 0. According to 16S rRNA and phenylalanyl-tRNA synthase alpha subunit (pheS) gene sequence similarity, this strain was closely related to Enterococcus pallens NBRC 100697T, E. hermanniensis CIP 108559T, E. avium NBRC 100477T and E. raffinosus NBRC 100492T with 98.9-99.1 % and 77.0-82.0 % sequence similarities, respectively. Phylogenetic analysis indicated that strain Gos25-1T was clearly distinguished from closely related species of the genus Enterococcus. Draft genome of Gos25-1T had a size of 3.99 Mb which was contained 3788 coding sequences with in silico G+C content of 42.4 mol%. The ANIb and a digital DNA-DNA hybridisation (dDDH) values between strain Gos25-1T and the closest related species, E. pallens NBRC 100697T were 73.65 and 21.10 %, respectively. According to polyphasic characterisation, this strain represents a novel species of the genus Enterococcus, for which the name Enterococcus florum sp. nov. is proposed. The type strain is Gos25-1T (=CIP 110956T=LMG 29007T=NBRC 111461T=TISTR 2382T).

Reclassification of Nocardia species based on whole genome sequence and associated phenotypic data.

Type strains of 72 validated Nocardia species were phylogenetically analyzed based on the multilocus sequence analysis (MLSA) concatenated atpD-groL1-groL2-recA-rpoA-secY-sodA-ychF. Furthermore, their similarity based on digital DNA-DNA hybridization (dDDH) was calculated. Nocardia soli, Nocardia cummidelens and Nocardia salmonicida, Nocardia nova and Nocardia elegans, Nocardia exalbida and Nocardia gamkensis, and Nocardia coubleae and Nocardia ignorata formed coherent clades, respectively. Moreover, each set showed over 70% relatedness by dDDH and shared common phenotypic characteristics. Therefore, we propose a reclassification of Nocardia soli and Nocardia cummidelens as a later heterotypic synonym of Nocardia salmonicida, Nocardia elegans as a later heterotypic synonym of Nocardia nova, Nocardia gamkensis as a later heterotypic synonym of Nocardia exalbida, and Nocardia coubleae as a later heterotypic synonym of Nocardia ignorata.

Polycladomyces subterraneus sp. nov., isolated from soil in Thailand.

A thermophilic poly(L-lactide)-degrading Gram-stain-positive filamentous bacterial strain that develops single spores on the aerial mycelium was isolated from forest soil at Srinagarind Dam, Kanchanaburi Province, Thailand. The results of a polyphasic taxonomic study showed that our isolate had characteristics typical of members of the genus Polycladomyces. The isolate grew aerobically at an optimum temperature of 50-55 °C and optimal pH 6-7. Meso-diaminopimelic acid was present as the diagnostic diamino acid in the peptidoglycan but no characteristic sugars are detected. The predominant menaquinone was MK-7. The diagnostic phospholipids were phosphatidylethanolamine, phosphatidylmethylethanolamine diphosphatidylglycerol, phosphatidylglycerol and phosphatidylserine. The predominant cellular fatty acid was iso-C15 : 0. The DNA G+C content of strain KSR 13T was 53.4 mol%. The 16S rRNA gene sequence analysis also indicated that strain KSR 13T belonged to the genus Polycladomyces, being most closely related to Polycladomyces abyssicola JIR-001T (99.2 %). The DNA-DNA relatedness values that distinguished KSR 13T from P. abyssicola JIR-001T were 17.8-32.1 %, which were significantly below the 70 % cutoff value recommended for species delineation. Following an evaluation of phenotypic, chemotaxonomic and genotypic studies, the new isolate is proposed as a novel species and named Polycladomyces subterraneus sp. nov. The type strain is KSR 13T (=BCC 50740T=NBRC 109332T).

Sporolactobacillus shoreicorticis sp.nov., a lactic acid-producing bacterium isolated from tree bark.

A Gram-stain-positive, lactic acid-producing bacterium designed strain MK21-7T, was isolated from tree bark collected from the north east of Thailand. This strain was a facultatively anaerobic spore-forming rod that was catalase-negative. It contained meso-diaminopimelic acid in the cell wall peptidoglycan and had seven isoprene units (MK-7) as the predominant menaquinone. Major fatty acids of MK21-7T were anteiso-C17 : 0, iso-C16 : 0, anteiso-C15 : 0 and C18 : 1ω9c. Polar lipids were phosphatidglycerol, diphosphatidylglycerol, an unknown phospholipid, three unknown glycolipids and an unknown lipid. The results of 16S rRNA gene sequence analysis indicated that it represented a member of the genus Sporolactobacillus. MK21-7T showed the highest 16S rRNA gene sequence similarity to Sporolactobacillus terrae NBRC 101527T with 98.4 % similarity and exhibited 97.6 % similarity with Sporolactobacillus kofuensis NRIC 0334T, 97.5 % with Sporolactobacillus laevolacticus NRIC 0361T, 97.3 % with Sporolactobacillus nakayamaesubsp.nakayamae NRIC 0347T and 97.1 % with Sporolactobacillus nakayamaesubsp.racemicus NBRC 101524T. Analysis of the phylogenetic relationship based on 16S rRNA and gyrB gene sequencing revealed that the position of MK21-7T was clearly separated from all related species of the genus Sporolactobacillus. It had low DNA-DNA relatedness (22.8-57.2 %) with S. terrae NBRC 101527T and related type strains. The DNA G+C content was 43.1 mol%. On the basis of the results of the phenotypic, genotypic and chemotaxonomic studies, MK21-7T should be classified as representing a novel species of the genus Sporolactobacillus for which the name Sporolactobacillus shoreicorticis sp. nov. is proposed. The type strain is MK21-7T (=NBRC 111517T=LMG 29111T=TISTR 2466T).

Achromobacter aloeverae sp. nov., isolated from the root of Aloe vera (L.) Burm.f.

Two Gram-staining-negative, strictly aerobic, rod-shaped bacteria, designated strains AVA-1T and AVA-2, were isolated from the root of Aloe vera (L.) Brum.f. derived from Chachoengsao Province, Thailand. The strains contained cytochrome oxidase and catalase activities. They grew in 4 % (w/v) NaCl, at a pH range of 6.0-9.0 (optimally at pH 7) and at 20-42 °C (optimally at 30-37 °C). The major isoprenoid quinone was ubiquinone with eight isoprene units (Q-8). The major fatty acids were C16 : 0 and C17 : 0 cyclo. On the basis of 16S rRNA gene sequence analysis, the strains represent a species belonging to the genus Achromobacter and are closely related to Achromobacter xylosoxidans NBRC 15126T (98.80 %), Achromobacter insolitus LMG 6003T (98.64 %), Achromobacter aminicus LMG 26690T (98.59 %), Achromobacter pulmonis LMG 26696T (98.58 %) and Achromobacter insuavis LMG 26845T (98.58 %). The DNA G+C content of strain AVA-1T was 66.5 mol%. The novel strains had low DNA-DNA relatedness values with related type strains. On the basis of the phenotypic and genotypic data obtained, the strains clearly represent a novel species, for which the name Achromobacter aloeverae sp. nov. is proposed. The type strain is strain AVA-1T (=LMG 29108T=NBRC 111463T=PCU 352T=TISTR 2383T).

Lactobacillus ixorae sp. nov., isolated from a flower (West-Indian jasmine).

A Gram-stain-positive, lactic acid bacterium, strain Ru20-1T, was isolated from a flower (West-Indian jasmine) collected from Kalasin province, Thailand. A polyphasic approach was used to determine the taxonomic position of this strain. Studies of morphological and biochemical characteristics revealed that strain Ru20-1T belonged to the genus Lactobacillus. The strain was heterofermentative, non-spore-forming and rod-shaped. It produced dl-lactic acid. Based on 16S rRNA gene sequence similarity, this strain was closely related to Lactobacillus lindneri LMG 14528T (96.8 %), Lactobacillus sanfranciscensis NRIC 1548T (95.4 %) and Lactobacillus florum NRIC 0771T (95.2 %), respectively. In addition, the pheS gene sequence of strain Ru20-1T was closely related to those of L. sanfranciscensis NRIC 1548T (92.0 %), L. lindneri LMG 14528T (89.0 %) and L. florum NRIC 0771T(85.0 %). Phylogenetic analysis indicated that strain Ru20-1T was clearly separated from closely related species of the genus Lactobacillus. The DNA G+C content of strain Ru20-1T was 47.8 mol %. The cell-wall peptidoglycan type was l-Lys-d-Asp. The major cellular fatty acids were C18 : 1ω9c, C20 : 0, C20 : 1ω9c and summed feature 7 (unknown 18.846 and/or C19 : 1ω6c and/or C19 : 0 cyclo). On the basis of the data provided, strain Ru20-1T represents a novel species of the genus Lactobacillus, for which the name Lactobacillus ixorae sp. nov. is proposed. The type strain is Ru20-1T (=LMG 29008T=NBRC 111239T=PCU 346T=TISTR 2381T).

Reclassification of Amycolicicoccus subflavus as Hoyosella subflava comb. nov. and emended descriptions of the genus Hoyosella and Hoyosella altamirensis.

16S rRNA gene sequences of two type strains belonging to different genera within the suborder Corynebacterineae, namely Hoyosella altamirensis and Amycolicicoccus subflavus, show a similarity of 99.8 %. Therefore, in order to clarify their taxonomic relationship, a polyphasic recharacterization under the same conditions was carried out. The peptidoglycan of H. altamirensis NBRC 109631T and A. subflavus NBRC 109087T was of A1γ type with meso-diaminopimelic acid as their diagnostic diamino acid. Both strains contained MK-8 as the only detected menaquinone, C16 : 0 and C18 : 1ω9c as the major fatty acids, and diphosphatidylglycerol, phosphatidylethanolamine and phosphatidylinositol as the principal polar lipids. The coincidences of these chemotaxonomic features suggested that H. altamirensis and A. subflavus should be assigned to the same genus. Meanwhile, the average nucleotide identity value between both strains and the results of physiological and biochemical tests indicated that H. altamirensis and A. subflavus should be affiliated to different species. Therefore, according to Rules 38 and 41a of the Bacteriological Code, it is proposed that Amycolicicoccus subflavus Wang et al. 2010 be reclassified as Hoyosella subflava comb. nov. (type strain DQS3-9A1T=CGMCC 4.3532T=DSM 45089T=JCM 17490T=NBRC 109087T) and the descriptions of the genus HoyosellaJurado et al. 2009 and Hoyosella altamirensisJurado et al. 2009 are emended accordingly.

Kocuria pelophila sp. nov., an actinobacterium isolated from the rhizosphere of a mangrove.

A novel spherical actinobacterium, designated RS-2-3T, was isolated from the rhizosphere of a mangrove growing on Rambut Island, Indonesia, and its taxonomic position was investigated using a polyphasic approach. Phylogenetic analysis based on 16S rRNA gene sequence comparison revealed that strain RS-2-3T was related to the members of the genus Kocuria. The highest 16S rRNA gene sequence similarity value was observed with Kocuria marina KMM 3905T (97.0 %). The peptidoglycan type of strain RS-2-3T was found to be A3α with an interpeptide bridge comprising l-Ala4-5. The predominant menaquinone was MK-7(H2) and the major fatty acids were anteiso-C15 : 0 and iso-C15 : 0. The DNA G+C content was 71.8 mol%. These characteristics were consistent with those of members of the genus Kocuria. Meanwhile, physiological and biochemical characteristics revealed that strain RS-2-3T differed from the species of the genus Kocuria with validly published names. Therefore, strain RS-2-3T represents a novel species of the genus Kocuria, for which the name Kocuria pelophila sp. nov. is proposed. The type strain is RS-2-3T (=NBRC 110990T=InaCC A704T).

Cellulosimicrobium marinum sp. nov., an actinobacterium isolated from sea sediment.

A novel Gram stain positive actinobacterium, designated RS-7-4(T), was isolated from a sea sediment sample collected in Indonesia, and its taxonomic position was investigated using a polyphasic approach. Strain RS-7-4(T) was observed to form vegetative hyphae in the early phase of growth, but the hyphae eventually fragmented into short rods to coccoid cells. Growth occurred at 15-37 °C, pH 6.0-11.0 and in the presence of 0-7 % (w/v) NaCl. Phylogenetic analysis based on 16S rRNA gene sequence comparisons revealed that strain RS-7-4(T) was closely related to the members of the genus Cellulosimicrobium, with a similarity range of 98.08-99.10 %. The peptidoglycan type of strain RS-7-4(T) was found to be A4α L-Lys-L-Thr-D-Asp. The predominant menaquinone was MK-9(H4), and the major fatty acids were anteiso-C15:0, iso-C15:0 and anteiso-C17:0. The DNA G+C content was 75.6 mol%. These chemotaxonomic features corresponded to those of the genus Cellulosimicrobium. Meanwhile, the results of DNA-DNA hybridization, and physiological and biochemical tests revealed that strain RS-7-4(T) was different from the recognized species of the genus Cellulosimicrobium. Therefore, strain RS-7-4(T) represents a novel species of the genus Cellulosimicrobium, for which the name Cellulosimicrobium marinum sp. nov. is proposed. The type strain is RS-7-4(T) (=NBRC 110994(T) =InaCC A726(T)).

Streptomyces andamanensis sp. nov., isolated from soil.

A novel actinomycete, strain KC-112T, was isolated from soil collected from Similan Islands, Phang-Nga Province, Thailand. The strain exhibited morphological and chemotaxonomic characteristics consistent with those of members of the genus Streptomyces. The formation of smooth spiral spore chains was observed on aerial mycelia. ll-Diaminopimelic acid was detected in whole-cell hydrolysates, but no diagnostic sugars were detected and the strain lacked mycolic acids. The N-acyl type of muramic acid was acetyl. The major menaquinones were MK-9(H8), MK-9(H6) and MK-9(H2). The predominant cellular fatty acids were anteiso-C15 : 0, anteiso-C17 : 0, iso-C16 : 0 and C16 : 0. The polar lipids were diphosphatidylglycerol, phosphatidylethanolamine, phosphatidylglycerol, phosphatidylinositol, phosphatidylinositol mannoside, an unknown phospholipid, an unknown aminolipid, unknown lipids and an unknown glycolipid. The DNA G+C content was 73 mol%. On the basis of 16S rRNA gene sequence analysis, strain KC-112T was closely related to Streptomyces fumanus NBRC 13042T (98.8 % 16S rRNA gene sequence similarity), Streptomyces anandii NBRC 13438T (98.8 %) and Streptomyces capillispiralis NBRC 14222T (98.8 %). DNA-DNA relatedness values among strain KC-112T and type strains of closely related species were lower than 70 %. On the basis of evidence from this taxonomic study using a polyphasic approach, strain KC-112T represents a novel species of the genus Streptomyces, namely Streptomyces andamanensis sp. nov. The type strain is KC-112T ( = KCTC 29502T = NBRC 110085T = PCU 347T = TISTR 2401T).

Actinoplanes bogoriensis sp. nov., a novel actinomycete isolated from leaf litter.

A novel actinomycete, designated LIPI11-2-Ac043(T), was isolated from leaf litter collected in Indonesia. According to phylogenetic analysis based on the 16S rRNA gene sequence comparisons, strain LIPI11-2-Ac043(T) was closely related to Actinoplanes abujensis A4029(T) (99.3%) and Actinoplanes brasiliensis DSM 43805(T) (98.8%). Spores of strain LIPI11-2-Ac043(T) were motile and the sporangia were spherical. The predominant menaquinone was MK-9(H6) and the principal polar lipids were phosphatidylinositol, phosphatidylethanolamine, phosphatidylglycerol and diphospatidylglycerol. The whole-cell sugars were galactose, glucose and mannose; rhibose, arabinose and xylose were also detected as minor components. The major fatty acids were anteiso-C15:0, iso-C16:0, iso-C15:0 and anteiso-C17:0. These data supported the affiliation of strain LIPI11-2-Ac043(T) to the genus Actinoplanes. Meanwhile, the results of DNA-DNA hybridization and physiological and biochemical tests indicated that strain LIPI11-2-Ac043(T) can be distinguished from its closest related species. Therefore, strain LIPI11-2-Ac043(T) represents a novel species of the genus Actinoplanes, for which the name Actinoplanes bogoriensis sp. nov. is proposed. The type strain is LIPI11-2-Ac043(T) (=InaCC A522(T)=NBRC 110975(T)).

Streptomyces hyaluromycini sp. nov., isolated from a tunicate (Molgula manhattensis).

A novel Gram-stain-positive actinomycete, designated MB-PO13(T), was isolated from a tunicate (Molgula manhattensis) collected in Tokyo Bay, Japan, and its taxonomic position was studied by a polyphasic approach. Phylogenetic analysis based on 16S rRNA gene sequence comparisons revealed that strain MB-PO13(T) was closely related to Streptomyces graminisoli JR-12(T) (99.72% 16S rRNA gene sequence similarity) and Streptomyces shenzhenensis 172115(T) (99.23%). The strain contained LL-diaminopimelic acid in the whole-cell hydrolysate. The predominant menaquinones were MK-9(H8) and MK-9(H6) and the major fatty acids were anteiso-C15:0, iso-C16:0, iso-C14:0 and C16:0. These data supported the affiliation of the novel strain to the genus Streptomyces. Meanwhile, results of DNA-DNA hybridization and physiological and biochemical tests indicated that strain MB-PO13(T) was distinguished from known Streptomyces type strains. Therefore, strain MB-PO13(T) represents a novel species of the genus Streptomyces for which the name Streptomyces hyaluromycini sp. nov. is proposed; the type strain is MB-PO13(T) (=NBRC 110483(T) =DSM 100105(T)).

Proposal of nine novel species of the genus Lysinimicrobium and emended description of the genus Lysinimicrobium.

Thirteen novel Gram-stain-positive bacteria were isolated from various samples collected from mangrove forests in Japan, and their taxonomic positions were investigated by a polyphasic approach. Phylogenetic analyses based on 16S rRNA gene sequence comparisons showed that the 13 isolates formed a single clade with Lysinimicrobium mangrovi HI08-69T, with a similarity range of 97.6-99.5 %. The peptidoglycan of the isolates was of the A4α type with an interpeptide bridge comprising Ser-Glu and an l-Ser residue at position 1 of the peptide subunit. The predominant menaquinone was demethylmenaquinone DMK-9(H4) and the major fatty acid was anteiso-C15 : 0. These chemotaxonomic characteristics corresponded to those of the genus Lysinimicrobium. On the basis of the phenotypic and phylogenetic data, along with average nucleotide identity values among the isolates, we concluded that the 13 isolates should be assigned to the following nine novel species of the genus Lysinimicrobium: Lysinimicrobium aestuarii sp. nov. (type strain HI12-104T = NBRC 109392T = DSM 28144T), Lysinimicrobium flavum sp. nov. (type strain HI12-45T = NBRC 109391T = DSM 28150T), Lysinimicrobium gelatinilyticum sp. nov. (type strain HI12-44T = NBRC 109390T = DSM 28149T), Lysinimicrobium iriomotense sp. nov. (type strain HI12-143T = NBRC 109399T = DSM 28146T), Lysinimicrobium luteum sp. nov. (type strain HI12-123T = NBRC 109395T = DSM 28147T), Lysinimicrobium pelophilum sp. nov. (type strain HI12-111T = NBRC 109393T = DSM 28148T), Lysinimicrobium rhizosphaerae sp. nov. (type strain HI12-135T = NBRC 109397T = DSM 28152T), Lysinimicrobium soli sp. nov. (type strain HI12-122T = NBRC 109394T = DSM 28151T) and Lysinimicrobium subtropicum sp. nov. (type strain HI12-128T = NBRC 109396T = DSM 28145T). In addition, an emended description of the genus Lysinimicrobium is proposed.

Cryptosporangium cibodasense sp. nov., isolated from leaf litter in Indonesia.

A novel actinomycete strain, designated LIPI11-2-Ac046T, was isolated from a leaf litter sample obtained from Cibodas Botanical Garden, West Java, Indonesia, using the rehydration and centrifugation method. The taxonomic status of this organism was established using a polyphasic approach. Comparative 16S rRNA gene sequence analysis revealed that strain LIPI11-2-Ac046T had the closest sequence similarities with members of the genus Cryptosporangium (97.99-98.90 %). The strain grew well on ISP 4 and ISP 5 media and formed sporangia. Spores of this strain were motile. The strain grew in the presence of 0-2 % (w/v) NaCl and the temperature range of 15-28 8C. The cell-wall hydrolysate contained meso-diaminopimelic acid as the diagnostic diamino acid and the whole-cell hydrolysate contained mannose, glucose, galactose, ribose and xylose, together with one unidentified O-methyl-pentose. The predominant menaquinones were MK-9(H4), MK-9(H6) and MK-9(H8), and the major polar lipid was phosphatidylethanolamine. The major cellular fatty acids were C18 : 1ω9c, iso-C16 : 0, C16 : 0 andC17 : 1ω9c. These phenotypic characteristics corresponded to those of the genus Cryptosporangium. Meanwhile, the results of DNA-DNA hybridization as well as physiological and biochemical analyses distinguished strain LIPI11-2-Ac046T from known members of the genus Cryptosporangium. On the basis of these data, it is proposed that strain LIPI11-2-Ac046T represents a novel species of the genus Cryptosporangium, with the name Cryptosporangium cibodasense sp. nov. The type strain is LIPI11-2-Ac046T (=InaCC A457T=NBRC 110976T).

Actinoplanes tropicalis sp. nov. and Actinoplanes cibodasensis sp. nov., isolated from leaf litter.

Two actinomycete strains, designated LIPI11-2-Ac034T and LIPI11-2-Ac042T, were isolated from leaf litter collected from Cibodas Botanical Garden, West Java, Indonesia. Phylogenetic analysis based on 16S rRNA gene sequences suggested that both isolates belong to the genus Actinoplanes. These isolates were closely related to Actinoplanes ferrugineus and Actinoplanes durhamensis with similarity values of 98.2 % and 97.7 % respectively, for strain LIPI11-2-Ac034T, and 99.0 % and 97.4-97.7 % respectively for strain LIPI11-2-Ac042T. Both isolates grew well on ISP 7 medium with brown soluble pigment production. Spores were motile and sporangia were irregular. The isolates contained meso-diaminopimelic acid in cell-wall hydrolysates, and mannose, glucose and galactose in whole-cell hydrolysates. The predominant menaquinone of strain LIPI11-2-Ac034T was MK-9(H4) while that of strain LIPI11-2-Ac042T was MK-9(H6). The major cellular fatty acids were iso-C16 : 0, iso-C15 : 0 and anteiso-C15 : 0 for strain LIPI11-2-Ac034T, and iso-C16 : 0, anteiso-C15 : 0, iso-C15 : 0 and anteiso-C17 : 0 for strain LIPI11-2-Ac042T. Phosphatidylethanolamine was detected as the diagnostic polar lipid. The DNA G+C contents of strains LIPI11-2-Ac034T and LIPI11-2-Ac042T were 71.5 and 70.7 mol%, respectively. Based on the differential phenotypic characteristics and the results of DNA-DNA hybridization and phylogenetic analysis, it is proposed that strains LIPI11-2-Ac034T and LIPI11-2-Ac042T represent two novel species of the genus Actinoplanes, for which the names Actinoplanes tropicalis sp. nov. (type strain LIPI11-2-Ac034T = InaCC A459T = NBRC 110973T) and Actinoplanes cibodasensis sp. nov. (type strain LIPI11-2-Ac042T = InaCC A458T = NBRC 110974T) are proposed.

Tropicihabitans flavus gen. nov., sp. nov., a new member of the family Cellulomonadaceae.

Two novel Gram-stain positive actinobacteria, designated PS-14-16(T) and RS-7-1, were isolated from the rhizosphere of a mangrove and sea sediment, respectively, and their taxonomic positions were investigated by a polyphasic approach. Both strains were observed to form vegetative hyphae in the early phase of growth but the hyphae eventually fragment into short rods to coccoid cells. The peptidoglycan type of both strains was found to be A4α. Their predominant menaquinone was identified as MK-9(H4) and the major fatty acid as anteiso-C(15:0). The DNA G+C content was determined to be 68.4-68.5 mol%. 16S rRNA gene sequencing revealed that strains PS-14-16(T) and RS-7-1 were related to members of the family Cellulomonadaceae. Their nearest phylogenetic neighbour was found to be Sediminihabitans luteus, which is currently the only species of the genus Sediminihabitans, with a similarity of 97.94%. However, strains PS-14-16(T) and RS-7-1 were distinguishable from the members of the genus Sediminihabitans and the other genera within the family Cellulomonadaceae in terms of chemotaxonomic characteristics and phylogenetic relationship. The results of DNA-DNA hybridization experiments indicated that strains PS-14-16(T) and RS-7-1 belong to the same species. Strains PS-14-16(T) and RS-7-1 are concluded to represent a novel genus and species of the family Cellulomonadaceae, for which the name Tropicihabitans flavus gen. nov., sp. nov. is proposed. The type strain of T. flavus is PS-14-16(T) (=NBRC 110109(T) = IanCC A 516(T)). [corrected].

Serinibacter tropicus sp. nov., an actinobacterium isolated from the rhizosphere of a mangrove, and emended description of the genus Serinibacter.

A novel Gram-stain-positive actinobacterium, designated PS-14-7(T), was isolated from the rhizosphere of a mangrove on Pramuka Island, Indonesia, and its taxonomic position was investigated using a polyphasic approach. The peptidoglycan type of strain PS-14-7(T) was A4α and lysine was the diagnostic diamino acid of the peptidoglycan. The predominant menaquinone was MK-8(H4) and the major fatty acids were anteiso-C(15 : 0), C(16 : 0) and iso-C(16 : 0). The DNA G+C content was 72.8 mol%. Phylogenetic analysis based on 16S rRNA gene sequence comparisons revealed that strain PS-14-7(T) was closely related to Serinibacter salmoneus Kis4-28(T) (99.6%). However, DNA-DNA hybridization and phenotypic characteristics revealed that strain PS-14-7(T) differed from Serinibacter salmoneus . Therefore, strain PS-14-7(T) represents a novel species of the genus Serinibacter , for which the name Serinibacter tropicus sp. nov. is proposed. The type strain is PS-14-7(T) ( = NBRC 110108(T) = InaCC A 515(T)). An emended description of the genus Serinibacter is also proposed.

Agromyces marinus sp. nov., a novel actinobacterium isolated from sea sediment.

Two novel Gram-stain-positive actinobacteria, designated H23-8(T) and H23-19, were isolated from a sea sediment sample and their taxonomic positions were investigated by a polyphasic approach. Phylogenetic analysis based on 16S rRNA gene sequence comparisons showed that these isolates were closely related to the members of the genus Agromyces, with similarity range of 94.5-97.4%. Strains H23-8(T) and H23-19 contained L-2,4-diaminobutyric acid, D-alanine, D-glutamic acid and glycine in their peptidoglycan. The predominant menaquinones were MK-13 and MK-12, and the major fatty acids were anteiso-C(15:0), anteiso-C(17:0) and iso-C(16:0). The DNA G+C content was 72.3-72.5 mol%. The chemotaxonomic characteristics of the isolates matched those described for members of the genus Agromyces. The results of phylogenetic analysis and DNA-DNA hybridization, along with differences in phenotypic characteristics between strains H23-8(T) and H23-19 and the species of the genus Agromyces with validly published names, indicated that the two isolates should be assigned to a novel species of the genus Agromyces, for which the name Agromyces marinus sp. nov. is proposed; the type strain is H23-8(T) (=NBRC 109019(T)=DSM 26151(T)).

Agromyces iriomotensis sp. nov. and Agromyces subtropicus sp. nov., isolated from soil.

Three novel Gram-stain-positive bacteria, designated IY07-20(T), IY07-56(T) and IY07-113, were isolated from soil samples from Iriomote Island, Okinawa, Japan, and their taxonomic positions were investigated by a polyphasic approach. Phylogenetic analysis based on 16S rRNA gene sequence comparisons showed that the three isolates were closely related to the members of the genus Agromyces, with similarity range of 95.6-98.7%. The isolates contained l-2,4-diaminobutylic acid, d-alanine, d-glutamic acid and glycine in their peptidoglycans. The predominant menaquinone was MK-12 and the major fatty acids were anteiso-C15:0 and anteiso-C17:0. The DNA G+C contents were 70.9-72.9 mol%. The chemotaxonomic characteristics of the isolates matched those described for members of the genus Agromyces. The results of phylogenetic analysis and DNA-DNA hybridization, along with differences in phenotypic characteristics between strains IY07-20(T), IY07-56(T) and IY07-113 and the species of the genus Agromyces with validly published names, indicate that the three isolates merit classification as representatives of two novel species of the genus Agromyces, for which the names Agromyces iriomotensis sp. nov. and Agromyces subtropica sp. nov. are proposed; the type strains are IY07-20(T) ( = NBRC 106452(T) = DSM 26155(T)) and IY07-56(T) ( = NBRC 106454(T) = DSM 26153(T)), respectively.