Species [C. elongatus]:
Cell body barrel-shaped but rather cylindrical, 65-80 μm long;
a few spines at posterior end; two caudal cilia present;
ectoplasmic plates ornamented by 2 lateral teeth (Carey, 1992).
Cell body 40-55 μm long, about 13 (or 14-17) rows of platelets;
three posterior spines (Kudo, 1966).
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