Abstract:
:The species Archangium gephyra, Angiococcus disciformis, Cystobacter minus and Cystobacter violaceus are currently classified in three different genera of the order Myxococcales. The 16S rRNA gene sequences of the respective type strains show a similarity higher than 98.4 % and form a tight phylogenetic group. A dendrogram calculating the similarity of MALDI-TOF spectra confirmed the close relatedness of the four species that grouped in a monophyletic cluster in the neighbourhood of other species of the genus Cystobacter. The type strains shared similar fatty acid patterns of high complexity with iso-C15 : 0, C16 : 1ω5c and iso-C14 : 0 3-OH as the major components. The vegetative cells of these species are uniformly long needle-shaped rods, and the myxospores are short rods, ovoid or irregularly spherical thus differing from the myxospores of species related to Cystobacter fuscus, the type species of this genus. Some enzymic and hydrolysing reactions of the type strains are described. As a result of the high relatedness and similarity of the four species, it is proposed to place them into one genus, and due to phylogenetic and morphological distinctness, the species should be classified in a genus distinct from the genus Cystobacter as Archangium gephyra (type strain M18T = DSM 2261T = ATCC 25201T = NBRC 100087T), Archangium disciforme comb. nov. (type strain CMU 1T = DSM 52716T = ATCC 33172T), Archangium minus comb. nov. (proposed neotype strain Cb m2 = DSM 14751 = JCM 12627) and Archangium violaceum comb. nov. (type strain Cb vi61T = DSM 14727T = CIP 109131T = JCM 12629T). Since the family ArchangiaceaeJahn 1924 AL has priority over the family CystobacteraceaeMcCurdy 1970 AL, it is proposed to assign the genera Archangium, Anaeromyxobacter, Cystobacter, Hyalangium, Melittangium and Stigmatella to the family Archangiaceae. Emended descriptions of the families Myxococcaceae and Archangiaceae are also provided.
journal_name
Int J Syst Evol Microbiolauthors
Lang E,Schumann P,Tindall BJ,Mohr KI,Spröer Cdoi
10.1099/ijsem.0.000533subject
Has Abstractpub_date
2015-11-01 00:00:00pages
4032-4042issue
11eissn
1466-5026issn
1466-5034journal_volume
65pub_type
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