其腹面口区具二环围口纤毛列；背面具一列背刚毛。

There are two circumoral ciliary rows on the buccal region and a dorsal row of bristles.

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其腹面口区具二环围口纤毛列及一口前纤毛列；背面具一列背刚毛；腹面纤毛列的数目可发生较大变动。

There are two circumoral ciliarvrows and a preoral ciliary row on the buccal region and a dorsal row of bristles.

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