SEM scalebar = 10 µm

Site ID: ILL 2012-0047

Site Name: Grove Lake, Antelope County, Nebraska

Latitude: 42.37905

Longitude: -96.11779

Caption: external view, rapheless valve

Notes: Image credit: Steve Main and Catharina Grubaugh

Contributor: Catharina Grubaugh | Marina Potapova - June 2012