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Lobosea: Gymnamoebia: Amoebida: Flabellina: Flabellulidae

Rosculus sp.
Hawes, 1963

Rosculus Genus: Small amoeba with rapidly changing form; sometimes spatulate or flabellate; hyaline zone usually with smoothly irregular edge; sometimes deeply divided; one known species ? (Page, 1976).

Rosculus sp. or Mayorella ?), locomotive form 30 μm long, 18 μm wide, L/W=1.7, x 640, Onnenai, Kushiro marsh, Kushiro city, Hokkaido, Japan, October 16, 2005 by Y. Tsukii
scale 31 μm scale 63 μm scale 94 μm; x 640
Rosculus Rosculus

R. ithacus: 5-17 μm, exceptionally 25 μm (Page, 1976). Locomotive 5-15 μm long, rarely to 25 μm; pseudopods clear, eruptive; uroid none (Illustrated Guide, 1985).

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