Family Corynebacteriaceae refers to a group of bacteria that are gram-positive and rod-shaped. This family includes several genera, such as Corynebacterium, Mycobacterium, and Nocardia. Some synonyms for the family Corynebacteriaceae include Actinomycetaceae, Mycobacteriaceae, and Streptomycetaceae. These families were once thought to be related due to their similar morphologies, but genetic analysis has shown that they are actually distinct. Corynebacteriaceae are known to cause a variety of diseases in humans, including diphtheria, tuberculosis, and leprosy. They are also important biotechnological organisms used in the production of antibiotics, amino acids, and bioplastics.