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Spirotrichea: Hypotrichia: Euplotida: Aspidiscidae

Aspidisca aculeata
(Ehrenberg, 1838) Kahl, 1930-5

Aspidisca aculeata Genus: Ovoid, firm; dorsal side convex, ventral side flattened; dorsal surface ridged; adoral zone reduced or rudimentary; macronucleus U-shaped or in two rounded parts (Kudo, 1966).
Species: Ovoid, 50 μm long; dorsal surface with four ribs, the second from left of which carries a sharp backwardly curving thorn; 7 frontoventral, 5-6 transverse cirri; macronucleus horseshoe-shaped (Carey, 1992).

Aspidisca sp., cell body 35 μm long, 30 μm wide, four ? transverse cirri, x 400, x 640, Uruguay, November 1999, photo by Y. Tsukii
scale 50 μm scale 100 μm scale 150 μm; x 400
Aspidisca aculeata Aspidisca aculeata
scale 31 μm scale 63 μm scale 94 μm; x 640
Aspidisca aculeata Aspidisca aculeata

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