logo2

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

Thalassiosirales

Cyclotella

1. Cyclotella
image
1000x
image
1000x
Dollar Bay from boat
aquatic plant sample
9/26/01
2. Cyclotella
image
800x
Pilgrim River upstream of US-41
rock scraping
5/24/10
18°C
3. Cyclotella
image
800x
same as above

Stephanodiscus

1. Stephanodiscus
image
800x
Portage Lake from boat
oblique plankton tow
9/18/05
20°C
2. Stephanodiscus
image
800x
image
800x
Keweenaw Waterway at MTU
plankton tow
6/11/03
16.5°C
3. Stephanodiscus
image
800x
image
800x
Keweenaw Waterway at MTU
surface plankton tow
11/8/01
4. Stephanodiscus
image
800x
image
800x
Keweenaw Waterway at MTU
plankton tow
6/11/03
16.5°C

Melosirales

Melosira

1. Melosira varians
image
800x
image
800x
Pilgrim River upstream of US-41
rock scraping
5/24/10
18°C
2. Melosira varians
image
800x
Pilgrim River upstream of US-41
rock scraping
9/19/01
3. Melosira varians
image
800x
same as above
4. Melosira granulata
image
320x
image
1000x
Dollar Bay from boat
surface plankton tow
9/26/01
5. Melosira granulata
image
800x
same as above
6. Melosira
image
800x
Keweenaw Waterway at MTU
plankton tow
10/29/07
7. Melosira
image
800x
Dollar Bay at boat launch
plankton tow
5/20/10
20°C
8. Melosira
image
640x
Keweenaw Waterway by MTU
rock scraping
9/12/01

Rhizosoleniales

Acanthoceras

1. Acanthoceras
image
640x
Dollar Bay from boat
oblique plankton tow
7/29/10
pH 8.9, 27°C, 133 uS
2. Acanthoceras
image
800x
Keweenaw Waterway at MTU
oblique plankton tow
10/16/05
13.5°C
3. Acanthoceras
image
800x
same as above

Urosolenia

1. Urosolenia eriensis
image
640x
Torch Lake at Hubbell boat launch
oblique plankton tow
10/15/05
13°C
2. Urosolenia eriensis
image
500x
same as above
3. Urosolenia eriensis
image
400x
image
800x
Torch Lake at Hubbell boat launch
surface plankton tow
5/20/10
17°C
4. Urosolenia eriensis
image
500x
Keweenaw Waterway at MTU
surface plankton tow
11/22/05
6.0°C
5. Urosolenia longiseta
image
320x
image
500x
Pike Bay from dock
oblique plankton tow
7/30/06
24.5°C