SEM scalebar = 10 µm

Site ID: Iowa Lakeside Lab 2012 T_0_1

Site Name: Toolik Lake sediment, Alaska North Slope

Latitude: 68.63

Longitude: -149.60

Caption: internal valve face

Notes: Two rimoportulae are present. Note the internal expression is a stalked, lipped structure

Contributor: William Daniels - June 2012