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Spirotrichea: Stichotrichida: Urostylina: Urostylidae

Urostyla sp.
Ehrenberg, 1830

Urostyla 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).
Genus: With 2 or more right marginal files of cirri (Illustrated Guide, 1985). Ellipsoid; flexible; posterior rounded; flattened ventral surface with 4-10 rows of cirri; 2 marginal rows; 3 or more frontals; 5-12 anals (Kudo, 1966). Ovoid to elongate with large number of ventral rows of cirri (files); transverse cirri present; frontal cirri undifferentiated from ventrals (Carey, 1992).


Urostyla sp. (trichogaster ?), cell body 230 μm long, 80 μm wide, L/W=2.9, x 400, x 640, Futayo-no-ike (pond) near Haguro mountain, Haguro town, Yamagata Pref., Japan, July 10, 2005 by Y. Tsukii
scale 50 μm scale 100 μm scale 150 μm; x 400
Urostyla Urostyla Urostyla Urostyla

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