Class Heterolobosea Page & Blanton, 1985 Order Acrasida Schröter, 1886 - acrasids Family Guttulinopsidae L. Olive, 1970 Genus Guttulinopsis E.W. Olive, 1901 1 Guttulinopsis vulgaris E.W. Olive, 1901 2 Guttulinopsis nivea Raper et al., 1977