Description
Relatively wide , anteriorly-opened oral cavity ; body nearly round in cross-section ; left marginal cirri inconspicuous; transverse cirri conspicuous ; planktonic ; three genera. b 9 <9 t;? 1. Body, cup-shaped and circular in cross-section ; transverse cirri in U-shape ... .... ..... ........ .. ....... . ................. .. ... .. ... ... .. ............ .... Gastrocirrhus 1'. Body elongate and broad ; transverse cirri arranged otherwise ....... ...... ............ .... ............. 2 2. Transverse cirri in row directly across long axis of body and posterior to oral cavity; single left marginal cirrus .... . ... ..... .... .. Euplotidium 2'. Transverse cirri as long file on right posterior margin of the body; left marginal cirri, absent. .... ............. .... . .. . .. .. ...... ... ... Cytharoides
Type species
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Raw text
Relatively wide , anteriorly-opened oral cavity ; body nearly round in cross-section ; left marginal cirri inconspicuous; transverse cirri conspicuous ; planktonic ; three genera. b 9 <9 t;? 1. Body, cup-shaped and circular in cross-section ; transverse cirri in U-shape ... .... ..... ........ .. ....... . ................. .. ... .. ... ... .. ............ .... Gastrocirrhus 1'. Body elongate and broad ; transverse cirri arranged otherwise ....... ...... ............ .... ............. 2 2. Transverse cirri in row directly across long axis of body and posterior to oral cavity; single left marginal cirrus .... . ... ..... .... .. Euplotidium 2'. Transverse cirri as long file on right posterior margin of the body; left marginal cirri, absent. .... ............. .... . .. . .. .. ...... ... ... Cytharoides