Phylum Firmicutes, Class Bacilli, Order Bacillales, Family Bacillaceae, Genus Bacillus, Bacillus halmapalus Nielsen, Fritze and
Priest 1995. Description is based upon two isolates. It is distinguished from B. horikoshii by its larger cell size, lower salt tolerance,
and DNA relatedness.
Rods, 0.6-1.0 x 3.0-4.0 µm, forming paracentrally to subterminally, ellipsoidal
endospores in unswollen sporangia.
Colonies are small, shiny, and creamy-white with entire margins. Aerobic. Growth
occurs at pH 7 and 8 (optimum) and at 10-40 ºC. Alkalitolerant. Allantoin, urate and
NaCl are not required for growth. No growth in nutrient broth with 2-10% NaCl added.
Isolated from soil.
- N.A. Logan and P. De Vos, 2009. Genus I. Bacillus Cohn 1872. In: (Eds.) P.D. Vos, G. Garrity, D. Jones, N.R. Krieg, W. Ludwig, F.A.
Rainey, K.-H. Schleifer, W.B. Whitman. Bergey’s Manual of Systematic Bacteriology, Volume 3: The Firmicutes, Springer, 21-127.
- Nielsen P., Fritze D. and Priest F. G., 1995. Phenetic diversity of alkaliphilic Bacillus strains: proposal for nine new species.
Microbiology 141, 1745-1761.
Positive results for hydrolysis of casein, gelatin, hippurate and starch.
Negative results for deamination of phenylalanine, nitrate reduction, hydrolysis of
Tweens 20, 40, 60 and 80.
(c) Costin Stoica