Abstract
The genus Corallococcus was separated from the genus Myxococcus mainly on the basis of differences in morphology and consistency of swarms and fruiting bodies of the respective members. Phylogenetic, chemotaxonomic and physiological evidence is presented here that underpins the separate status of these phylogenetically neighbouring genera. Emended descriptions of the two genera are presented. The data also suggest that the species Corallococcus macrosporus belongs to the genus Myxococcus. To the best of our knowledge, the type strains of the species Myxococcus macrosporus and Myxococcus stipitatus are not available from any established culture collection or any other source. A Request for an Opinion is made regarding the proposal that strain Cc m8 (=DSM 14697=CIP 109128) be formally recognized as the neotype strain for the species Myxococcus macrosporus, replacing the designated type strain Windsor M271T, and that strain Mx s8 (=DSM 14675=JCM 12634) be formally recognized as the neotype strain for the species Myxococcus stipitatus, replacing the designated type strain Windsor M78T.
Highlights
Within the family Myxococcaceae, delineation of genera, descriptions of species and affiliations of strains to species are based primarily on the morphology of vegetative cells, swarming colonies, fruiting bodies and myxospores
The genus Myxococcus was described by Thaxter (1892), who first recognized that the myxobacteria, formerly assigned to the fungi, were bacteria
The genus name was accepted as being validly published, but the species name Corallococcus macrosporus was not accepted as being synonymous with Myxococcus macrosporus on formal grounds (Reichenbach, 2007; see details below)
Summary
DSMZ – Deutsche Sammlung von Mikroorganismen und Zellkulturen GmbH, Inhoffenstr. 7B, 38124 Braunschweig Germany. The genus Corallococcus was separated from the genus Myxococcus mainly on the basis of differences in morphology and consistency of swarms and fruiting bodies of the respective members. Phylogenetic, chemotaxonomic and physiological evidence is presented here that underpins the separate status of these phylogenetically neighbouring genera. The data suggest that the species Corallococcus macrosporus belongs to the genus Myxococcus. To the best of our knowledge, the type strains of the species Myxococcus macrosporus and Myxococcus stipitatus are not available from any established culture collection or any other source. A Request for an Opinion is made regarding the proposal that strain Cc m8 (5DSM 14697 5CIP 109128) be formally recognized as the neotype strain for the species Myxococcus macrosporus, replacing the designated type strain Windsor M271T, and that strain Mx s8 (5DSM 14675 5JCM 12634) be formally recognized as the neotype strain for the species Myxococcus stipitatus, replacing the designated type strain Windsor M78T
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