1887

Abstract

The transient occurrence during the summer of 1982 of “” Hortobágyi 1965, originally described as a planktonic fungus, in two eutrophic man-made ponds in Tempe, Ariz., provided the first recorded sightings of this unusual organism in the United States. A comparison of phase-contrast micrographs prepared from Arizona material with archival descriptions and sketches showed agreement in all respects. Transmission electron microscopy suggested that “” is a bacterium rather than a fungus. Notable differences in several traits serve to exclude “” from the group of budding and nonprosthecately appendaged bacteria. There was no evidence of multifibrillar appendages or crateriform surface structures in “”; these are major defining characteristics of the group. “” is a filamentous and rosette-forming bacterium of unknown taxonomic position.

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1984-10-01
2024-04-22
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