SEM scalebar = 2 µm
Site ID: Iowa Lakeside Lab 2012 T_0_1
Site Name: Toolik Lake sediment, Alaska North Slope
Caption: detail, external valve face
Notes: The external expression of a rimoportula is in the bottom, center of the image. The simple opening is positioned near the end of a short stria. The striae are multi-seriate.
Contributor: William Daniels - June 2012