Litostomatea:
Haptoria: Haptorida: Spathidiidae
Spathidium syrtis
Lepsi, 1964
Genus: Body long to ovoid; apex fan-shaped; txicysts evenly distributed along edge of apex (Illustrated Guide, 1985).
Body elongate, circular in cross section; antrerior obliquely truncated, surmounted by an unciliated apical ridge,
which is lined with trichocysts; cytostome slit-like (Carey, 1992).
Very many species (Corliss, 1979).
Species:
Cell body ovoid, rotund, 255 μm long, with a well-developed
anterior (apical ridge thick), macronucleus ellipsoidal (Carey, 1992).
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Spathidium syrtis (or extensum ?),
cell body 115 μm long, 48 μm wide, L/W=2.4,
x 400, x 640, Yasuragi-no-ike (pond), Oura central park, Oura town, Gunma Pref., Japan, February 18, 2006 by Y. Tsukii
50 μm
100 μm
150 μm; x 400 :
31 μm
63 μm
94 μm; x 640
Images of collecting locality:
Yasuragi-no-ike (pond), Oura central park, Oura town, Gunma Pref., Japan, February 2006 by Y. Tsukii
S. syrtis Lepsi, 1964:
Cell body ovoid, rotund, 255 μm long, with a well-developed
anterior (apiccal ridge thick), macronucleus ellipsoidal (Carey, 1992).
S. extensum Kahl, 1933:
cell body long and tubular, 200-250 μm long,
anterior truncate and expanded, posterior rounded, trichocyst present in the anterior,
macronucleus long and moniliform (Carey, 1992).
Please click on images for viewing enlarged.
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