Description
Amo eboid ce ll s wi th a flagellated basa l body located immediately adjacent to the anteri or nucl eus. The nucleus may be pull ed out anteriorly to have a conical appearance (Fig . 6) . The connection may be see n with th e ligh t microscope. Th e flagellum is long and directed fo rward, the pseudopodi a are simple, branched , 11 02 PELOBIONTIDA or absent . The cells may swim or glide. Life cycles may include amoeboid organisms , multinucl eated cells, or cysts (Simpson et al., 1997) . Electron-microscopical studies (e.g. Brugerolle et al., 1991 a) have shown that a cone of microtubules connects the short basal body to the nucleus (Fig. 2a) and that there is a ribbon of microtubul es extending from the basal body into the cytoplasm. The flagellum has the conventional 9+2 arrangement of microtubules within the axoneme, but variations on the normal organization of the basal body have been reported (Simpson et al., 1997) . The monotypic genus Phreatamoeba was erected by Chavez et al . (1986) for organisms with a complex life cycle. Phreatamoeba cannot be distinguished from M a stigamoeba and thus is a synonym of Mastigamoeba , (Simpson et al. , 1997) . Dinamoeba mirabilis Leidy, 1874, the type species of that genus , also appears to be an incomplete description of Mastigamoeba aspera (Simpson et al ., 1997) . With about 40 nominal species, many of which will prove to be incomplete descriptions of other species . Referen ces: Brugerolle , 1991 a; Klug , 1936 ; Lemmermann , 1914; Penard , 1909 ; Schulze , 1875; Simpson et al., 1997.
Type species
Mastigamoeba aspera Schulze, 1875
Figures
Raw text
Amo eboid ce ll s wi th a flagellated basa l body located immediately adjacent to the anteri or nucl eus. The nucleus may be pull ed out anteriorly to have a conical appearance (Fig . 6) . The connection may be see n with th e ligh t microscope. Th e flagellum is long and directed fo rward, the pseudopodi a are simple, branched , 11 02 PELOBIONTIDA or absent . The cells may swim or glide. Life cycles may include amoeboid organisms , multinucl eated cells, or cysts (Simpson et al., 1997) . Electron-microscopical studies (e.g. Brugerolle et al., 1991 a) have shown that a cone of microtubules connects the short basal body to the nucleus (Fig. 2a) and that there is a ribbon of microtubul es extending from the basal body into the cytoplasm. The flagellum has the conventional 9+2 arrangement of microtubules within the axoneme, but variations on the normal organization of the basal body have been reported (Simpson et al., 1997) . The monotypic genus Phreatamoeba was erected by Chavez et al . (1986) for organisms with a complex life cycle. Phreatamoeba cannot be distinguished from M a stigamoeba and thus is a synonym of Mastigamoeba , (Simpson et al. , 1997) . Dinamoeba mirabilis Leidy, 1874, the type species of that genus , also appears to be an incomplete description of Mastigamoeba aspera (Simpson et al ., 1997) . With about 40 nominal species, many of which will prove to be incomplete descriptions of other species . Referen ces: Brugerolle , 1991 a; Klug , 1936 ; Lemmermann , 1914; Penard , 1909 ; Schulze , 1875; Simpson et al., 1997.