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Spirotrichea: Stichotrichia: Stichotrichida: Urostylina: Urostylidae

Unidentified Urostylidae

Suborder: Frontoventral cirri as 2 or more zig-zag files almost full length of ventrum.
Family: Frontal cirri differ in size and/or pattern from ventral ones of files; "collar" extends short distance along right edge of body; oral area not U-shaped (Illustrated Guide, 1985).

??, protargol-stained by A. Kihara, cell body 126 μm long, 35 μm wide, x 640, Saitama Pref., Japan, May-June 1999 stained by A. Kihara, photo by Y. Tsukii
scale 31 μm scale 63 μm scale 94 μm; x 640

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