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Euglenophyceae: Euglenales
Mastigophora: Euglenida

Phacus
Dujardin 1841 (Mizuno & Takahashi eds. 2000; 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).
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Tail long; body flat or twisted
Phacus
P. gigas
3 samples
106-130 μm
1999-2008
Phacus longicauda
P. longicauda
17 samples
tail long
48-88 μm
199?-2008
Phacus
P. torta
var. torta
= P. tortus
9 samples
1997-2008
Phacus
P. torta
var. tortuosa
= P. helikoides
18 samples
1997-2008
Phacus
P. smulkowskianus
36- x 16 μm
Kashiwa Village p.
Kashiwa
Chiba, 2008
Phacus
P. lismorensis
4 samples
bending
54-95 μm
Japan, 2001-2004
Phacus ranula
P. ranula
153-160 x μm
3 samples
1999-2008
Phacus
Phacus sp.
51 μm
Iyari marsh 4
Omachi
Nagano, 2007
Phacus
Phacus sp.
82 x 46 μm
Lake Biwa
Maibara
Shiga, 2008
Tail short; body flat or with wavy margins
Phacus triqueter
P. triqueter
21 samples
tail curved
dorsal ridge
44-86 μm
1999-2008
Phacus
P. pleuronectes
18 samples
tail curved
ridge absent
39-77 μm
199?-2006
Phacus obolus
P. obolus
7 samples
tail straight
38-55 μm
2002-2006
Phacus
Phacus sp.
many paramylons
51 μm
Mihashi Park
Saitama, 2002
Phacus
P. landekiensis
6 samples
26-71 μm
199?-2006
Phacus
P. circulatus
4 samples
body circular
45-55 μm
2004-2007
Phacus
P. curvicauda
9 samples
tail short, curved
27-50 x μm
1998-2006
Phacus
P. acuminatus
or P. orbicularis ?
45 samples
tail V-shaped
25-45 μm
1998-2008
Phacus
P. caudatus
5 samples
21-32 μm
199?-2006
Phacus undulatus
P. undulatus
2 samples
43 x 29 μm
Iwajuku
Gunma, 2001
Phacus
P. skujae
5 samples
21-24 x μm
2003-2006
Phacus
P. trapezoides
31 x 16 μm
Noda
Higashi-matsuyama
Saitama, 2004
Phacus
Phacus sp.
25 x 11 μm
Nanbata castle p.
Fujimi
Saitama, 2005
Body twisted or spirally striated or coated with granules
Phacus
P. warszewiczii
60 x 31 μm
Uruguay, 1999
Phacus
P. inflatus
3 samples
50 x 36 μm
2001-2004
Phacus
P. hammeli ?
29 μm
longitudinally bent
Saitama, 2001
Phacus
Phacus sp.
spiral striae
45 x 40 μm
tail 25 μm
Kurihashi
Saitama, 2001
Phacus trimarginatus
P. trimarginatus
μm
Kodama
Saitama, 2003
Phacus trimarginatus
P. trimarginatus
65 x 12 μm
Mizumoto Park
Tokyo, 2006
Phacus raciborskii
P. raciborskii
4 samples
35-37 μm
2001-2004
Phacus
P. pyrum
30 samples
20-48 μm
1998-2008
Phacus trypanon
P. trypanon
8 samples
39-50 μm
2003-2008
Phacus suecicus
P. suecicus
= P. monilata
39 x 23 μm
Higusa-numa
Hikari
Chiba, 2003
Phacus hispidulus
P. hispidulus ?
= P. pomiformis
12 samples
22-38 x μm
1999-2008
Phacus
Phacus sp.
P. glabrus ?
2 samples
23 x 20 μm
Uruguay, 1999
Phacus
Phacus sp.
2 samples
20 x 19 μm
Uruguay, 1999
Phacus aenigmaticus
P. aenigmaticus
11 samples
20-30 x 9-14 μm
2001-2008
Phacus
Phacus sp.
30 x 12 μm
Shiba river
near Owada p.
Saitama, 2005
Phacus
Phacus sp.
28 x 14 μm
Maruyama Park
Ageo
Saitama, 2006
Tail absent
Phacus
P. brevicaudatus ?
58 x 50 μm
Tane-ike
Togakushi highland
Nagano, 2005
Phacus
P. brevicaudatus ?
μm
Kashibaru m.5
Karatsu
Saga, 2008
Phacus stokesii
P. stokesii
14 samples
15-19 μm
2001-2005
Phacus pusillus
P. pusillus
5 samples
16-33 μm
2001-2005

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Phacus
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