Nassophorea: Microthoracida: Microthoracidae

Engelmann, 1862

Family: Cyrtos in rear 1/2 of body, hidden by ventral pellicular fold.
Genus: Cytostome in rear 1/3 of body (Illustrated Guide, 1985). Irregular, almost triangular in shape; anterior pointed; posterior rounded; distinctly flattened with a delicate keeled armour; somatic ciliation reduced; ventrally 3 longitudinal cilary rows; cytostome in a depression at posterior ventral region; tooth-like projection on the left side (Carey, 1992).

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