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Lobosea: Gymnamoebia: Amoebida: Thecina: Striamoebidae (or Thecamoebidae)

Striamoeba sp.
Bovee, 1953

Striamoeba Family & Genus: Under 100 μm long; oblong to ovate; with several, longitudinal, parallel ridges; uninucleate .
Similar species ->> Thecamoeba striata

Striamoeba sp. ?, cell body 38 μm long, 34 μm wide, L/W=1.1, x 640, standing water under Akigase bridge, Akigase park, Saitama city, Saitama Pref., Japan, February 27, 2005 by Y. Tsukii
scale 31 μm scale 63 μm scale 94 μm; x 640
Striamoeba Striamoeba

S. munda Penard, 1890: Locomotive, 40-50 μm long, 30-40 μm wide; pseudopods none; uroid none; ectoplasm, pale, as anterolateral margin; 3-4 dorsal ridges; endoplasm finely granular; nucleus spherical 10 μm, endosome ring between 2 polar caps; contractile vacuole none ? (Illustrated Guide, 1985).

S. similis (Schaeffer, 1926): 30-80 μm long; broadly ovate, with few dorsal ridges; nuclear endosomal granules scattered under nuclear membrane (How to know the protozoa, 1979).

S. quadrilineata: 35-38 μm long; elliptical; 2-5, usually 4 dorsal ridges; nucleus with single, smooth endosome (How to know the protozoa, 1979).

S. striata (Penard, 1890): Locomotive, 30-50 μm long, 20-30 μm wide, pseudopods rare; uroid none; ectoplasm pale; 3-5 dorsal ridges and clear, antero-lateral margin; endoplasm finely granular; nucleus spherical, 5-6 μm, endosome as a band or 2-3 pieces; contractile vacuole 8-12 μm (Illustrated Guide, 1985). Ovate; 30-80 μm long; 3-4 dorsal ridges; nucleus with 2 or 3 ribbon-like endosomes (How to know the protozoa, 1979).

S. corrugata Bovee, 1953: 35-80 μm long; usually 6 ridges; slightly tapered front and rear; nucleus with plastic central endosome (How to know the protozoa, 1979).

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