(biology) taxonomic group containing one or more species

one-celled monerans having simple cells with rigid walls and (in motile types) flagella

a genus of helical or curved or straight aerobic bacteria with rounded ends and multiple flagella; found in the gastric mucosa of primates (including humans)

aerobic bacteria widely distributed in nature

the type genus of Rhizobiaceae; usually occur in the root nodules of legumes; can fix atmospheric oxygen

small motile bacterial rods that can reduce nitrates and cause galls on plant stems

type genus of the Bacillaceae; includes many saprophytes important in decay of organic matter and a number of parasites

one-celled monerans having simple cells with rigid walls and (in motile types) flagella