Description
Solitary , loricate ; lorica closed by lip - like folds or flap-like operculum ; body attached at oral end , almost fills lorica; lorica flattened hemisphere attached to substrate by long axis ; telotroch forming to left side of parent (when viewed (from above); ectosymbionts , especially of crustacea; eight genera. 1. Aperture closed by single flap-like operculum inside thickened , lip-like extensions surrounding lorica aperture .. .... . Opercu/igera 1'. Aperture closed by lips of lorica aperture ........ 2 2. Closure apparatus transverse to body axis and lorica .. ...... ............. ........................................ 2'. Closure apparatus at about 45 ° angle to transverse axis of body and lo ... .... ... .................... ... ... ...... ... Paralagenophrys 3. Both lips of lorica aperture pulled entirely within lorica when aperture closed ...... .. .. .... ...... . ............................... .. .......... Clistolagenophrys 3. Lips not pulled in as above ...... .. .... .. .. ............ ...... 4 4. Both anterior and posterior lips of aperture flexible .... .... ............ ........ ... ... .. ...... ...... .... 4'. Posterior lip only is flexible and closes aperture ................. .... ............ .. ..... Setonophrys 5. Lorica attached directly to substratum .. ...... .. .. .. .. ..... .... ............. .......... .. ... ... .. .... .. ...... Lagen 5' . Lorica attached by short posterior stalk .. .... .. .... .. ......... .. .... ... .. .. .. .. ... .. .... ....... .... ... ..... . (from Clamp, 1987)
Type species
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Solitary , loricate ; lorica closed by lip - like folds or flap-like operculum ; body attached at oral end , almost fills lorica; lorica flattened hemisphere attached to substrate by long axis ; telotroch forming to left side of parent (when viewed (from above); ectosymbionts , especially of crustacea; eight genera. 1. Aperture closed by single flap-like operculum inside thickened , lip-like extensions surrounding lorica aperture .. .... . Opercu/igera 1'. Aperture closed by lips of lorica aperture ........ 2 2. Closure apparatus transverse to body axis and lorica .. ...... ............. ........................................ 2'. Closure apparatus at about 45 ° angle to transverse axis of body and lo ... .... ... .................... ... ... ...... ... Paralagenophrys 3. Both lips of lorica aperture pulled entirely within lorica when aperture closed ...... .. .. .... ...... . ............................... .. .......... Clistolagenophrys 3. Lips not pulled in as above ...... .. .... .. .. ............ ...... 4 4. Both anterior and posterior lips of aperture flexible .... .... ............ ........ ... ... .. ...... ...... .... 4'. Posterior lip only is flexible and closes aperture ................. .... ............ .. ..... Setonophrys 5. Lorica attached directly to substratum .. ...... .. .. .. .. ..... .... ............. .......... .. ... ... .. .... .. ...... Lagen 5' . Lorica attached by short posterior stalk .. .... .. .... .. ......... .. .... ... .. .. .. .. ... .. .... ....... .... ... ..... . (from Clamp, 1987)