Phylum Amoebozoa Lühe, 1913 Subphylum Lobosa Carpenter, 1861 see Infraphylum Lobosa Carpenter, 1861 Class Discosea Cavalier-Smith, 2004 Subclass Longamoebia Cavalier-Smith & Smirnov, 2011 Order Centramoebida Rogerson & Patterson, 2002 Family Balamuthiidae Cavalier-Smith, 2004 [monotypic] 1 Genus Balamuthia Visvesvara et al., 1993