Description
Body usually densely ciliated ; kineties closely adjacent; kinetosomes with a proximal and distal cartwheel; cyrtos , typically large, with complete palisade of nematodesmata; synhymenium , if present, beginning in postoral region and extending to lateral left; extrusomes, rod-like when present ; four families. la . Dorsal surface. (from Deroux , 1978) Side . (after Dragesco , 1965) b 9 <9 t;? 1. Synhymenium with few to many polykinetids composed of at least four kinetosomes extending (from postoral region to left, sometimes onto dorsal surface ...... .. .. .................... .. Nassulidae 1'. With polykinetids restricted to oral area .......... 2 2. Oral polykinetids within oral cavity .............. .... 3 2' . Oral polykinetids not confined to an oral cavity .. . CILIOPHORA, NASSOPHOREA .... ... ... .... ..... ... .... .. ................ .... .. Furgasoniidae 3. Oral region in anterior 1/4 of cell ; cells, typically > 100 ~m long ..... ... Paranassulidae 3'. Oral region in middle 1/3 of cell; cells , typically < 70 ~m long .............. Colpodidiidae
Type species
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Body usually densely ciliated ; kineties closely adjacent; kinetosomes with a proximal and distal cartwheel; cyrtos , typically large, with complete palisade of nematodesmata; synhymenium , if present, beginning in postoral region and extending to lateral left; extrusomes, rod-like when present ; four families. la . Dorsal surface. (from Deroux , 1978) Side . (after Dragesco , 1965) b 9 <9 t;? 1. Synhymenium with few to many polykinetids composed of at least four kinetosomes extending (from postoral region to left, sometimes onto dorsal surface ...... .. .. .................... .. Nassulidae 1'. With polykinetids restricted to oral area .......... 2 2. Oral polykinetids within oral cavity .............. .... 3 2' . Oral polykinetids not confined to an oral cavity .. . CILIOPHORA, NASSOPHOREA .... ... ... .... ..... ... .... .. ................ .... .. Furgasoniidae 3. Oral region in anterior 1/4 of cell ; cells, typically > 100 ~m long ..... ... Paranassulidae 3'. Oral region in middle 1/3 of cell; cells , typically < 70 ~m long .............. Colpodidiidae