Visit us at

Diatoms of the United States is now known as Diatoms of North America.
This site has been redesigned and updated, and will be closing soon.


Aulacoseira alpigena

(Grunow) Krammer 1991      Category: Centric
BASIONYM: Melosira distans var. alpigena

Asterionella ralfsii var. americana


Aulacoseira ambigua

SEM scalebar = 1 ┬Ám

Site ID: MC05BASSC10

Site Name: Bass Creek

Latitude: 46.57366

Longitude: -114.14642

Caption: Oblique view of a valve showing ringleiste

Contributor: - May 2009