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Dinophyceae: Peridiniales: Peridinaceae
Dinoflagellida: Diniferina: Peridiniidae

Peridinium
Ehrenberg 1832

Order: Cell body covered with theca; cingulum (horizontal groove) and sulcus (vertical groove) consipicuous.
Family: Apical pore present (Illustrations of The Japanese Fresh-water Algae, 1977).

Genus: Body round to polygonal; cingulum median, deep; thecal plates 5-6 in cingulum; some with apical and antapical horn (Illustrated Guide, 1985). Epicone (or epitheca) consists of 11-14 thecal plates; hypocone (or hypotheca) of 7-8 thecal plates (Illustrations of The Japanese Fresh-water Algae, 1977).
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Peridinium bipes
P. bipes
10 samples
50-68 μm
199?-2008
Peridinium bipes
P. bipes
10 samples
50-68 μm
199?-2008
Peridinium
Peridinium sp.
52-66 x 50-58 μm
Lake Kawaguchi
Yamanashi, 2001
Peridinium
P. elpatiewskyi ?
2 samples
27-35 μm
199?-2001
Peridinium
P. volzii ?
6 samples
47-55 μm
1998-2005
Peridinium
Peridinium sp.
μm
Daidarabotchi-ike
Iizuna-kogen
Nagano, 2003
Peridinium
P. cunningtonii ?
32 x 24 μm
Koshigaya
Saitama, 2001
Peridinium pygmaeum
P. pygmaeum ?
33 x 28 μm
Tama river
Komae
Tokyo, 2004
Peridinium
P. pygmaeum ?
35 x 32 μm
Lake Nojiri
Shinano
Nagano, 2004
Peridinium
Peridinium sp. ?
31 x 32 μm
Shikinawa-ike
Fukuoka, 2001
Peridinium
Peridinium sp. ?
μm
City Museum
Iruma
Saitama, 2003
Peridinium
Peridinium sp. ?
μm
Chichibu Muse p.
Saitama, 2003
xxxx
Peridinium sp. ?
17-20 x 12-17 μm
Tanohara Natural p.
Ontake highland
Nagano, 2005
xxxx
Peridinium sp. ?
22 x 15 μm
Ukishima marsh
Tsugaike highland
Nagano, 2005
Peridinium
Peridinium sp. ?
μm
Daidarabotchi-ike
Iizuna-kogen
Nagano, 2003
Peridinium
Peridinium sp.
P. volzii ?
43 x 45 μm
Shimo-no-koike
Shiga highland
Nagano, 2004

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Peridinium Peridinium
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