1·There are two circumoral ciliary rows on the buccal region and a dorsal row of bristles.
其腹面口区具二环围口纤毛列；背面具一列背刚毛。
2·There are two circumoral ciliarvrows and a preoral ciliary row on the buccal region and a dorsal row of bristles.
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。