Description
Pyriform cell tapered posteriorly of 15-170 ~ m long according to the species (Fig. ?A). Four flagella inserted apically , directed backward and only adherent to the body in their proximal part. Nucleus anterior, close to the 2 pairs of basal bodies connected to the preaxostylar lamina. Large ribbon-like axostyle protruding posteriorly and surrounded by a sheath at the posterior end. The parallel rows of microtubules (up to 60) forming the axostyle begin to assemble at the anterior end close to the preaxostylar lamina. The axostyle is contractile and undulates in the cytoplam with bending waves originating at the anterior end and passing backwards (Mcintosh et al., 1973) . A row of microtubules corresponding to the pelta covers the anterior end. At least 2 species live in the roach Cryptocercus punctulatus. They swim free in the lumen and they have no developed attachment apparatus. They feed by pinocytosis and divide during the intermolt of the insect. Encysted cells also ensure host to host transmission (Cleveland et al., 1934) . A sexual process compns1ng gametogenesis, fertilization , and meiosis in relation with the molting of the insect host has been described (Cleveland, 1950a), partial electron microscopic study in Mcintosh et al. (1973) . A 8 (after Nie, 1950). Bar=1 0 !Jm. 58. Po/ymastix melolonthae from Coleoptera larvae (after Grasse, 1952). Bar=10 j..lm . A
Type species
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Raw text
Pyriform cell tapered posteriorly of 15-170 ~ m long according to the species (Fig. ?A). Four flagella inserted apically , directed backward and only adherent to the body in their proximal part. Nucleus anterior, close to the 2 pairs of basal bodies connected to the preaxostylar lamina. Large ribbon-like axostyle protruding posteriorly and surrounded by a sheath at the posterior end. The parallel rows of microtubules (up to 60) forming the axostyle begin to assemble at the anterior end close to the preaxostylar lamina. The axostyle is contractile and undulates in the cytoplam with bending waves originating at the anterior end and passing backwards (Mcintosh et al., 1973) . A row of microtubules corresponding to the pelta covers the anterior end. At least 2 species live in the roach Cryptocercus punctulatus. They swim free in the lumen and they have no developed attachment apparatus. They feed by pinocytosis and divide during the intermolt of the insect. Encysted cells also ensure host to host transmission (Cleveland et al., 1934) . A sexual process compns1ng gametogenesis, fertilization , and meiosis in relation with the molting of the insect host has been described (Cleveland, 1950a), partial electron microscopic study in Mcintosh et al. (1973) . A 8 (after Nie, 1950). Bar=1 0 !Jm. 58. Po/ymastix melolonthae from Coleoptera larvae (after Grasse, 1952). Bar=10 j..lm . A