FAMILY XII. CORYNEBACTERIACEAE 



605 



fla.vi'ge.na. L. noun flavus yellow; L. v. 

 gigno to produce; M.L. adj. fiavigenus 

 yellow-producing. 



Angular rods, 0.4 to 0.6 by 0.7 to 1.8 mi- 

 crons, occasionally curved, clubbed or 

 branched. Non-motile. Gram-variable. 



Gelatin agar: Gelatin hydrolyzed. 



Gelatin stab: Slow liquefaction. 



Agar slant: Smooth, glistening, opaque, 

 j^ellow growth. 



Broth: Uniformlj^ turbid. 



Filter paper in 0.5 per cent peptone broth: 

 Paper strip reduced to a pulpy mass or 

 weakened sufficiently so that the fibers 

 separate on slight agitation. 



Potato: Smooth, creamy yellow growth. 



Acid from glucose, lactose, sucrose, malt- 

 ose and starch. 



Acetylmethylcarbinol not produced. 



Starch is hydrolyzed. 



Nitrites produced from nitrates. 



Ammonia not produced. 



Aerobic, facultatively anaerobic. 



Optimum temperature, between 28° and 

 33° C. 



Source: Isolated from a mixed culture and 

 from soil. 



Habitat: Widely distributed in soil. 



9. Cellulonionas uda (Kellerman et al., 

 1913) Bergey et al., 1923. {Bacterium udum 

 Kellerman, McBeth, Scales and Smith, 

 Cent. f. Bakt., II Abt., 39, 1913, 514; Bergey 

 et al., Manual, 1st ed., 1923, 166.) 



u'da. L. adj. udus moist, wet. 



Cells 0.5 by 1.0 to 1.5 microns. Non-mo- 

 tile. Gram-negative. 



Gelatin agar: Gelatin hydrolyzed. 



Gelatin stab: Slow liquefaction. 



Agar slant: Moderate, flat, grayish white 

 growth. 



Broth: Uniformly turbid. 



Filter paper in 0.5 per cent peptone broth : 



Paper strip reduced to a pulpy mass or 

 weakened sufficiently so that the fibers 

 separate on slight agitation. 



Potato: Good growth. 



Acid from glucose, fructose, maltose, 

 lactose, sucrose and starch; acid production 

 variable with .xylose and arabinose. 



Acetylmethylcarbinol not produced. 



Starch is hydrolyzed. 



Nitrites produced from nitrates. 



Aerobic, facultatively anaerobic. 



Optimum temperature, between 28° and 

 33° C. 



Source: Isolated from compost from Vir- 

 ginia. 



Habitat: Soil. 



10. Cellulonionas acidula (Kellerman 

 et al., 1913) Bergey et al., 1923. (Bacterium 

 aciduhim Kellerman, McBeth, Scales and 

 Smith, Cent. f. Bakt., II Abt., 39, 1913, 513; 

 Bergey et al., Manual, 1st ed., 1923, 167.) 



a.ci'du.la. L. dim. adj. acidulus somewhat 

 sour. 



Cells 0.3 to 0.4 by 1.0 to 1.3 microns. Non- 

 motile. Gram-negative. 



Gelatin stab: Growth scant; liquefaction 

 usually not apparent. 



Agar slant: Slight to moderate or abun- 

 dant grayish growth. 



Cellulose agar: Variable enzymatic zones 

 around colonies. 



Broth: Slightly turbid. 



Potato: No apparent growth. 



Acid from glucose; other sugars weakly or 

 variably fermented. 



Nitrites not produced from nitrates. 



Ammonia not produced. 



Aerobic, facultatively anaerobic. 



Optimum temperature, between 28° and 

 33° C. 



Source: Isolated from soil from Utah. 



Habitat: Soil. 



Genus VI. Arthrobacter Conn and Dimmick, 19^7 * 



(Jour. Bact., J4, 1947, 300.) 



Ar.thro.bac'ter. Gr. noun arthrus a joint; M.L. mas.n. bacter the masculine equivalent of 

 the Gr. neut.n. hactrum a rod; M.L. mas.n. Arthrobacter a jointed rod. 

 Buchanan, Cowan and Wik^n (Internat. Bull. Bact. Nomen. and Taxon., 5, 1955, 83) 



* Prepared by Dr. A. G. Lochhead, Department of Agriculture, Ottawa, Canada, July, 

 1954. 



