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Euglenophyceae: Euglenales
Mastigophora: Euglenida

Phacus torta
=> Phacus tortus & Phacus helikoides
Phacus tortus (Lemmermann) Skvortsov 1928 (John et al. eds. 2002)
Phacus tortus (Lemmermann) Skvortsow 1928 (Mizuno & Takahashi eds. 2000)
Phacus helikoides Pochmann 1942 (Mizuno & Takahashi eds. 2000; Ling & Tyler 2000)
Phacus helicoides Pochmann 1941 (John et al. eds. 2002)

Genus: Highly flattened; pellicle firm; body form constant (Kudo, 1966). Chloroplasts small, discoid, pyrenoids usually absent; most species flat and leaf-shaped; often with ridges or fins running helically or longitudinally (Illustrated Guide, 1985).
Species: 80-100 μm; similar to P. longicauda; twisted 40-60 degree (How to know the protozoa, 1979).
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Var. torta (= Phacus tortus (Lemmermann) Skvortzow 1928): twisted 40-60 degree
Phacus
v. torta
cell 79 x 56 μm
tail 62 μm
anterior wide
Japan, 1997
Phacus
v. torta
cell 51 x 39 μm
tail 27 μm
anterior narrowed
Japan, 1998
Phacus
v. torta
cell 48 x 39 μm
tail 23 μm
anterior narrowed
Japan, 1999
Movies
Phacus
v. torta
cell 55 x 41 μm
tail 35 μm
anterior narrowed
Uruguay, 1999
Phacus torta
v. torta
cell 95 x 45 μm
tail 43 μm
Iyari marsh 1
Omachi
Nagano, 2007
Phacus torta
v. torta
cell μm
tail μm
Hazama marsh
Ashikaga
Tochigi, 2003
Phacus
v. torta
cell 63 x 42 μm
tail 35 μm
anterior narrowed
Mihashi Park
Saitama, 2002
Phacus torta
v. torta
cell 85 x 38 μm
tail μm
Ko-numa
Tsukiyono
Gunma, 2007
Phacus torta
v. torta
μm
tail μm
Lake Biwa
Kusatsu
Shiga, 2008
Var. tortuosa: twisted about 90 degree (or P. helikoides Pochmann, 1942 ?)
Phacus
v. tortuosa
anterior wide
cell 60 x 42 μm
tail 25 μm
Uruguay, 1999
Phacus
v. tortuosa
anterior wide
cell 47 x ? μm
tail 25 μm
Uruguay, 1999
Phacus
v. tortuosa
cell 50 x 40 μm
tail 32 μm
Kosugi
Toyama, 2002
Phacus torta
v. tortuosa
anterior wide
cell μm
tail μm
Tsuchiura
Ibaraki, 2003
Phacus torta
P. torta (tortus)
v. tortuosa
anterior wide
cell μm
tail μm
Kodama
Saitama, 2003
Phacus torta
P. torta (tortus)
v. tortuosa
anterior wide
cell μm
Yoshimi athletic p.
Yoshimi
Saitama, 2004
Var. tortuosa (= Phacus helikoides Pochmann 1942): twisted more than 90 degree
Phacus
v. tortuosa
anterior wide
cell 100 x 53 μm
tail 50 μm
Japan, 199?
Phacus
v. tortuosa
anterior narrowed
x μm
tail μm
Saitama, 1999
Phacus
v. tortuosa
anterior narrowed
cell x μm
tail μm
Uruguay, 1999
Phacus torta
v. tortuosa
75 x 35 μm
Imou bog
Toyohashi
Aichi, 2004
Phacus torta
v. tortuosa
anterior narrowed
cell x 39 μm
tail μm
near Town Hall
Shobu
Saitama, 2004
Phacus torta
v. tortuosa
cell 68 x 28 μm
Higashi-sano
Hakuba
Nagano, 2004
Phacus torta
v. tortuosa
or P. sesquitortus ?
cell 110 x 44 μm
Tane-ike
Togakushi highland
Nagano, 2005
Phacus torta
v. tortuosa
125 x 52 μm
Iyari marsh 1
Omachi
Nagano, 2007
Phacus torta
v. tortuosa
μm
Tamogi-ike 1
Iiyama
Nagano, 2008
Phacus
v. tortuosa ?
104 x 37 μm
86 x 42 μm
Mihashi Park
Saitama, 2002
Phacus torta
v. tortuosa ?
μm
μm
Kodama
Saitama, 2003
Phacus torta
v. tortuosa ?
114 x 37 μm
Suga-daira m.
Ueda
Nagano, 2006

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Phacus torta
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