Recharacterization and Emended Description of the Genus Mycoplana and Description of Two New Species, Mycoplana ramosa and Mycoplana segnis

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Abstract
The phenotypic and chemotaxonomic characteristics of Mycoplana strains were examined. These strains were gram-negative, peritrichously flagellated, branching, filament-forming bacteria. The cellular fatty acids consisted of large amounts of straight-chain unsaturated C18:1 acid, as well as straight-chain saturated C16:0 acid and unsaturated C16:1 acid. The major ubiquinone was ubiquinone Q10. The Mycoplana strains were divided into four groups, including one group containing Mycoplana dimorpha ATCC 4279T (= IFO 13291T = NCIB 9439T) (T = type strain) and another group containing Mycoplana bullata ATCC 4278T (= IFO 13290T = NCIB 9440T), on the basis of DNA base composition, major hydroxy fatty acid composition, mucosity of colonies, acid production from sugars, and utilization of carbon compounds. The division into groups was supported by the results of DNA-DNA homology experiments. Two new species, Mycoplana ramosa and Mycoplana segnis, are proposed. The type strain of M. ramosa is strain TK0053 (= NCIB 9440), and the type strain of M. segnis is strain TK0059 (= IFO 13240 = ATCC 21756).