Phycokey - Asterionella images

Asterionella (Bacillariophyceae)

Asterionella formosa.
Typical flat radiating colony of 7-8 cells glued valve face to valve face at inflated end.

Asterionella formosa
Open inner circle of an 8-celled flat colony.

Asterionella formosa
Three-dimensional colony with 9 - 16 cells or more.

Asterionella formosa
Cruciate flat colony with 4 cells (center of image).

Asterionella formosa.

Asterionella formosa
Attached choanaoflagellates. 2 July 2010, Wheelwright Pond, Lee, NH USA