| Cross Index | Meniscus glaucopis | 
| superset | Prokaryote, Eubacteria Gram-Negative curved bacteria | 
| Compare | Ancylobacter
        aquaticus ,"Brachyarcus thiophilus",
        Cyclobacterium
        marinum, Flectobacillus,
        Meniscus glaucopis, "Pelosigma", Runella slithyformis, Spirosoma linguale | 
| Contrast | Archaea | 
| Subset | 
| Morphology | Meniscus glaucopis | 
| CELLULAR | 
| Staining | Gram-negative | 
| Morphology | Curved or straight rods, 0.7-1.0 um in diameter and 2.0-3.0 um in length. Cultures may show single cells, pairs, tightly coiled spirals, S shapes (two cells, one inverted), and doughnut-shaped cells, where the ends are overlapping before division by binary fission has occurred. "Rings" have outer diameters of about 3.0 um.. | 
| Motility | Non-motile | 
| Specialized structures | Resting stages not known .Encapsulated. Gas vacuoles arranged at random within cells. | 
| Division | 
| COLONIAL | 
| Solid surface | Colonies chalky white | 
| Liquid | 
| Growth Parameters | Meniscus glaucopis | 
| PHYSIOLOGICAL | 
| Tropism | Chemoorganotrophic; strictly fermentative metabolism with no gas production | 
| Oxygen | Aerotolerantly anaerobic; capable of growth under an air atmosphere provided at least 1% CO2 is present | 
| pH | |
| Temperature | 30`C. No growth at 10 or 40`C | 
| Requirements | Vitamin B12, thiamin and CO2 required for growth | 
| Products | |
| Enzymes | Catalase- and oxidase-negative.. | 
| Unique features | 
| ENVIRONMENTAL | 
| Habitat | Isolated from anaerobic digester sludge. | 
| Lifestyle | |
| Pathogenicity | 
| Distribution | 
| Genome | Meniscus glaucopis | 
| G+C Mol % | 44.9 | 
| Reference | Meniscus glaucopis | 
| First citation | Irgens,R.L. (1977) Meniscus, a new genus of aerotolerant, gas vacuolated bacteria. IJSB 27:38-43 | 
| The Prokaryotes | p | 
| Bergey's Systematatic | p 135 R. L. Irgens | 
| Bergey's Determinative | p 66 | 
| References |