Phycokey - Didymosphenia images

Didymosphenia (Bacillariophyceae)

Didymosphenia sp. from a river in NW New Hampshire USA
Note the striations from the center and the attached stalk

Didymosphenia sp. from a river in NW New Hampshire USA

Didymosphenia geminata entirely covering the bottom of this stream in New Zealand.
Photograph posted online.

Didymosphenia geminata. from Rio Expolon, Futaleufu, Chile
Modified from photograph by Sarah A. Spaulding posted online

Didymosphenia sp.
Photograph from the University of Colorado Museum of Natural History posted online

Didymosphenia sp. illustrating branched striations on each side of the central node

Didymosphenia geminata illustrating branched striations near central nodule
Photograph by Andre Advocat at Mikrokosmos, 9 Sep 2007, posted online