The longitudinal fibre coarsefibred, sparse, 40-50 strips, which located between aboral ciliary wreath and polykinety and the fibers which at the bottom of the cell were connected with the longitudinal fibers, peristomial disc protruded up obviously and the peristomial disc fiber was reticular.
纵长纤维粗壮而稀疏，位于反口纤毛环和复毛基列之间，40~50条；底部有纤维和纵长纤维相连续，口围盘明显向上突起，口围盘纤维网状。