SEM scalebar = 10 µm

Site ID: LacCore, University of Minnesota, Yellowstone core 1A 0-1 cm depth

Site Name: Yellowstone Lake, Yellowstone National Park, Montana

Latitude: 44.44209

Longitude: -110.39466

Caption: external view; marginal spines, fultoportulae below each spine

Notes: Image by M. Potapova

Contributor: Sarah Spaulding | Marina Potapova - March 2012