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Heterotrichea: Heterotrichida: Spirostomatidae

Spirostomum
Ehrenberg, 1833

Genus: Body blunt at rear; kineties spiralled when body contracts (Illustrated Guide, 1985). Undulating membrane absent; lacnur canal from contractile vacuole (Carey, 1992).
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Peristome more than 2/3 of the cell length; macronucleus moniliform
Spirostomum
S. ambiguum
1200 x 100 μm
peri. > 3/4
Uruguay, 1999
Spirostomum ambiguum
S. ambiguum
1140 x 196 μm
Diamond marsh
Shiga highland
Nagano, 2004
Spirostomum ambiguum
S. ambiguum
1060 x 75 μm
Akebono marsh
Tsuchiyu-onsen
Fukushima, 2005
Spirostomum ambiguum
S. ambiguum
880 x 72 μm
peri. = 3/4
Sugadaira
Nagano, 2001
Spirostomum ambiguum
S. ambiguum
820 x 88 μm
peri. = ?
Ichikawa
Chiba, 2001
Spirostomum ambiguum
S. ambiguum
730 x 38 μm
Kodanuki marsh
Fujinomiya
Shizuoka, 2005
Spirostomum ambiguum
S. ambiguum
568 x 38 μm
peri. = 2/3
Ichikawa
Chiba, 2001
Spirostomum ambiguum
S. ambiguum
510 x 36 μm
peri. = 2/3
Iruma river
Kawagoe
Saitama, 2004
Spirostomum
S. ambiguum ?
452 x 56 μm
peri. = 2/3
Japan, 1999
Spirostomum ambiguum
S. ambiguum
450 x 70 μm
peri. = 2/3
Kiyose
Tokyo, 2001
Spirostomum ambiguum
S. ambiguum
μm
Omine-numa
Minakami
Gunma, 2008
Peristome about half of the cell length; macronucleus moniliform
Spirostomum
S. intermedium
800 μm
Japan, 199?
Spirostomum
S. intermedium
macronuclei
Japan, 199?
Spirostomum
S. intermedium
cell division
Japan, 1997
Spirostomum ambiguum
S. intermedium
790 μm
Ichikawa
Chiba, 2001
Spirostomum
S. intermedium
560,760 x μm
Nidanuma
Tsuchiyu-onsen
Fukushima, 2005
Spirostomum
S. intermedium
600 x μm
Akebono marsh
Tsuchiyu-onsen
Fukushima, 2005
Spirostomum
S. intermedium ?
Japan, 199?
S. intermedium
cell μm
Japan, 1998
S. intermedium
cell μm
Japan, 1998
S. intermedium
cell μm
Japan, 1998
Spirostomum intermedium
S. intermedium
μm
Kanazawa
Ishikawa, 2002
Spirostomum
S. intermedium
350 x 20 μm ?
Futayo-no-ike
Haguro mountain
Yamagata, 2005
Peristome less than half of the cell length; macronucleus ellipsoidal
Spirostomum teres
S. teres
534 x 38 μm
Iroha-numa
Zao mountain
Yamagata, 2005
Spirostomum teres
S. teres
500 x 44 μm
peri. = 2/5
cell division
Japan, 1999
Spirostomum
S. teres
320 x 30 μm
peri. = 2/5
mac. ellipsoidal
Japan, 1998
Spirostomum teres
S. teres
194 x 27 μm
peri. = 2/5
mac. ellipsoidal
Mishima
Shizuoka, 2001
S. teres
cell μm
peri. = 2/5 ?
Japan, 1998
Spirostomum
S. teres
460 x 520 μm
peri. = 1/3
mac. ellipsoidal
Uruguay, 1999
Spirostomum teres
S. teres
460 x 54 μm
360 x 40 μm
peri. = 1/3
mac. ellipsoidal
Matsumoto
Nagano, 2001
Spirostomum teres
S. teres
330 x 16 μm
mac. ellipsoidal
Shide-numa
Kita-kawabe
Saitama, 2005
Spirostomum teres
S. teres
500 x 80 μm
peri. = 1/4
mac. ellipsoidal
Ichikawa
Chiba, 2001
Spirostomum teres
S. teres ?
tail long
520 x 50 μm
peri. = 1/4
mac. ellipsoidal
Ichikawa
Chiba, 2001
Spirostomum teres
S. teres
300 x 64 μm
cell contracted
peri. = 1/4?
Mac. ellipsoidal
Kasai Seaside p.
Tokyo, 2001
Spirostomum teres
S. teres
280 x 76 μm
near Dedono-yu
Nishiwaga
Iwate, 2007
Peristome less than half of the cell length; macronucleus moniliform
Spirostomum
S. minus
800 x 24 μm
peri. = 1/3
Japan, 1998
Movies
Spirostomum minus
S. minus
780 x 34 μm
peri. = 1/3
mac. moniliform
USA, 1999
Spirostomum minus
S. minus
μm
Kareki-numa
Nikko
Tochigi, 2008
S. minus
cell μm
Japan, 1998
Peristome less than half of the cell length; macronucleus oval (one or two)
Spirostomum
S. filum
820 x 80 μm
peri. < 1/4
Japan, 199?
Spirostomum filum
S. filum
720 x 30 μm
Iyari marsh 3
Omachi
Nagano, 2007
Spirostomum filum
S. filum
330 x 18 μm
Karakemi marsh 1
Omachi
Nagano, 2007
Spirostomum
Spirostomum sp.
275 x 31 μm
peri. = 1/3
two mac.
Ushiku
Ibaraki, 2002
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Spirostomum
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