 Other similar clinically significant anaerobic cocci include "Veillonella" species (gram-negative cocci), and microaerophilic streptococci (aerotolerant).Anaerobic gram-positive cocci include various clinically significant species of the genus "Peptostreptococcus".Some clinically significant "Peptostreptococcus" species are, Gaffkya anaerobia, which was renamed Peptostreptococcus tetradius.