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This class consists of araphid diatoms. Specimens are organized into orders following Wehr et al. (2015).

Fragilariales

Fragilaria

1. Fragilaria crotonensis
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Keweenaw Waterway at MTU
oblique plankton tow
8/12/10
pH 8.6, 26°C, 132 uS
2. Fragilaria crotonensis
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Torch Lake at Hubbell boat launch
surface plankton tow
5/20/10
17°C
3. Fragilaria crotonensis
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Torch Lake at Lake Linden boat launch
surface plankton tow
9/27/05
18.5°C
4. Fragilaria
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Jacobsville old quarry pond
aquatic plant sample
8/7/10
pH 7.6, 17°C, 121 uS
5. Fragilaria capucina
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Pilgrim River upstream of US-41
rock scraping
5/24/10
18°C
6. Fragilaria capucina
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Dollar Bay from shore
surface plankton tow
6/19/07
19°C

Synedra

1. Synedra capitata
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Dollar Bay from boat
aquatic plant sample
9/26/01
2. Synedra ulna var. contracta
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creek south of Calumet
filamentous algae sample
10/3/01
3. Synedra ulna var. contracta
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Pilgrim River upstream of US-41
rock scraping
5/24/10
18°C
4. Synedra
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same as above
5. Synedra
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old Laurium dump creek
filamentous algae sample
7/1/10
pH 7.4, 13°C, 802 uS
6. Synedra
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Dollar Bay at marina
aquatic plant sample
5/20/10
20°C
7. Synedra
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Jacobsville old quarry pond
aquatic plant sample
8/7/10
pH 7.6, 17°C, 121 uS
8. Synedra
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Keweenaw Waterway at MTU
surface plankton tow
11/22/05
6.0°C

Tabellariales

Asterionella

1. Asterionella formosa
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MTU settling pond
surface plankton tow
10/16/05
11°C
2. Asterionella formosa
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Keweenaw Waterway at MTU
oblique plankton tow
10/16/05
13.5°C
3. Asterionella
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Traverse River at Mohawk-Gay Rd
plant detritus sample
5/20/10
18°C
4. Asterionella
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same as above

Diatoma

1. Diatoma
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Pilgrim River upstream of US-41
rock scraping
5/24/10
18°C
2. Diatoma
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same as above
3. Diatoma
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same as above
4. Diatoma
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same as above
5. Diatoma
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same as above
6. Diatoma
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same as above

Meridion

1. Meridion circulare
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Pilgrim River upstream of US-41
rock scraping
5/10/03
6.5°C
2. Meridion circulare
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same as above
3. Meridion circulare
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same as above
4. Meridion circulare
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Tech Trails creek
plant detritus sample
5/14/03
9.5°C
5. Meridion circulare
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same as above

Tabellaria

1. Tabellaria fenestrata
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Traverse River at Mohawk-Gay Rd
plant detritus sample
5/20/10
18°C
2. Tabellaria fenestrata
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Dollar Bay at marina
plankton tow
8/12/10
pH 8.4, 26°C, 130 uS
3. Tabellaria fenestrata
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Jacobsville old quarry pond
aquatic plant sample
8/7/10
pH 7.6, 17°C, 121 uS
4. Tabellaria flocculosa
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Dollar Bay at boat launch
plankton tow
5/20/10
20°C
5. Tabellaria flocculosa
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Dover Creek pool at US-41
plankton tow
7/15/10
pH 6.8, 25°C, 130 uS
6. Tabellaria flocculosa
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Keweenaw Waterway at Lily Pond
oblique plankton tow
8/29/05
15°C