It is not clear what big group meant but here are some examples of molds:
Black bread mold, as the name suggests, it is common on old bread. Alternaria is a type of mold that can be seen in damp areas of our homes. It is a common cause of allergy. Mucor is a mold that can be seen inside air conditioning units. Ulocladium is also a type that grows on damp areas. It is commonly black in appearance. Fusarium is a pink colored mold that grows in carpet and behind wallpapers.