Description
Club-shaped cell (5-165 ~m) with an anterior extensile rostellum containing fibers which arise at the base of the attachment point (Fig. 11 ). In attached forms a terminal nodule like a holdfast insures the fixation to the intestinal intima. The 4 flagella arise in 2 pairs in the shoulder region. The crystalline axostyle originates at the base of the rostellum , traverses the cell, and protrudes at the posterior end where it is surrounded by a sheath . The nucleus is generally anterior, at the base of the rostellum. Electron microscopic study has shown the oxymonad characters : presence of a preaxostylar lamina connected to the 2 pairs of basal bodies and a crystalline axostyle composed of parallel rows of microtubules (Fig . 4c). The rostellum is composed of a central bundle of non- organized microtubules surrounded by circonvoluted microtubulear ribbons arising at tne base of the holdfast and penetrating into the cell body (Fig . 4d) . The rostellum is terminated by a holdfast containing microfibrils (Fig . 4e). Attached flagellates are non-motile , and unattached ones swim in the intestinal fluid and partly loose their rostellum . Twenty-two species living in Kalotermitidae (Kofoid and Swezy, 1926 ; Connell, 1930; Zeliff , 1930; Cross, 1946) and 2 in the roach Cryptocercus (Cleveland, 1 95 Oc). Hormone-induced sexual cycle compns1ng gametogenesis, fertilization, and meiosis has been described in species living in the roach Cryptocercus (Cleveland, 1950c). Ultrastructure study in Brugerolle and Konig, 1997; Rother et al., 1999) .
Type species
Figures
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Raw text
Club-shaped cell (5-165 ~m) with an anterior extensile rostellum containing fibers which arise at the base of the attachment point (Fig. 11 ). In attached forms a terminal nodule like a holdfast insures the fixation to the intestinal intima. The 4 flagella arise in 2 pairs in the shoulder region. The crystalline axostyle originates at the base of the rostellum , traverses the cell, and protrudes at the posterior end where it is surrounded by a sheath . The nucleus is generally anterior, at the base of the rostellum. Electron microscopic study has shown the oxymonad characters : presence of a preaxostylar lamina connected to the 2 pairs of basal bodies and a crystalline axostyle composed of parallel rows of microtubules (Fig . 4c). The rostellum is composed of a central bundle of non- organized microtubules surrounded by circonvoluted microtubulear ribbons arising at tne base of the holdfast and penetrating into the cell body (Fig . 4d) . The rostellum is terminated by a holdfast containing microfibrils (Fig . 4e). Attached flagellates are non-motile , and unattached ones swim in the intestinal fluid and partly loose their rostellum . Twenty-two species living in Kalotermitidae (Kofoid and Swezy, 1926 ; Connell, 1930; Zeliff , 1930; Cross, 1946) and 2 in the roach Cryptocercus (Cleveland, 1 95 Oc). Hormone-induced sexual cycle compns1ng gametogenesis, fertilization, and meiosis has been described in species living in the roach Cryptocercus (Cleveland, 1950c). Ultrastructure study in Brugerolle and Konig, 1997; Rother et al., 1999) .