Description
Small ; body round or conical , twisted left less prominently than Metopidae ; somatic cilia as small kineties or cirrus -like tufts ; freshwater anaerobes ; three genera. 1. Body round to oblate , spineless ; somatic cilia only as tufts at ends .. .... .. ............... Cirranter 1'. Body with spines ; perizonal kineties appearing as series of transverse rows ...... ...... .......... .... 2 2. Longest spine "" body-length ; spines usually at posterior ; two somatic kineties .. .. .... .. .......... .. . . .. . .. . .. . . . . .. . .. . . . . .. . .. . . . . .... . .. . . . . . 2' . Longest spine at least 1 1/2 x body-length ; spines may be anterior ; no somatic kineties .... .. .. ...... .. .... .. .... .. ....... .. .. ............ ............
Type species
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Small ; body round or conical , twisted left less prominently than Metopidae ; somatic cilia as small kineties or cirrus -like tufts ; freshwater anaerobes ; three genera. 1. Body round to oblate , spineless ; somatic cilia only as tufts at ends .. .... .. ............... Cirranter 1'. Body with spines ; perizonal kineties appearing as series of transverse rows ...... ...... .......... .... 2 2. Longest spine "" body-length ; spines usually at posterior ; two somatic kineties .. .. .... .. .......... .. . . .. . .. . .. . . . . .. . .. . . . . .. . .. . . . . .... . .. . . . . . 2' . Longest spine at least 1 1/2 x body-length ; spines may be anterior ; no somatic kineties .... .. .. ...... .. .... .. .... .. ....... .. .. ............ ............