Description
Small to medium-sized, usually < 100 1-Jm long ; few somatic kineties , separated by wide 552 CILIOPHORA, NASSO interkinetal spaces; usually three left oral polykinetids , not confined to oral cavity; right paroral dikinetid, variable (vestige always occurs in stomatogenesis); cyrtos small, with complete palisade of nematodesmata; trichocysts, fibrous, anchor-like at tip; three families. b 9 <9 e? 1. Somatic kineties composed of cirrus-like polykinetids, most of more than kinetosomes ......... ..... .. ... .. ........ Discotrichidae 1'. Somatic kineties typically composed of monokinetids, but if polykinetids, with four or fewer kinetosomes .... ..... ...... ..... .......... ... ...... 2. Three preoral somatic kineties , usually of dikinetids, anterior to oral region ; left somatic kineties very reduced ... .. ... .. Microthoracidae 2'. Somatic kineties not obviously preoral; left somatic kineties not conspicuously reduced .... ..... .. ...... ...... .. ... .. .. Pseudomicrothoracidae
Type species
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Small to medium-sized, usually < 100 1-Jm long ; few somatic kineties , separated by wide 552 CILIOPHORA, NASSO interkinetal spaces; usually three left oral polykinetids , not confined to oral cavity; right paroral dikinetid, variable (vestige always occurs in stomatogenesis); cyrtos small, with complete palisade of nematodesmata; trichocysts, fibrous, anchor-like at tip; three families. b 9 <9 e? 1. Somatic kineties composed of cirrus-like polykinetids, most of more than kinetosomes ......... ..... .. ... .. ........ Discotrichidae 1'. Somatic kineties typically composed of monokinetids, but if polykinetids, with four or fewer kinetosomes .... ..... ...... ..... .......... ... ...... 2. Three preoral somatic kineties , usually of dikinetids, anterior to oral region ; left somatic kineties very reduced ... .. ... .. Microthoracidae 2'. Somatic kineties not obviously preoral; left somatic kineties not conspicuously reduced .... ..... .. ...... ...... .. ... .. .. Pseudomicrothoracidae