Megaterium

Megaterium is a specific name used for several taxa of bacterium:
 * Aquimarina megaterium, a bacterium from seawater
 * Bacillus megaterium, a bacterium found in many habitats
 * Gemmobacter megaterium, a bacterium from planktonic seaweed
 * Marinospirillum megaterium, a bacterium from fermented brine