![](http://www.alamy.com/thumbs/6/4413E11F-4240-4557-9518-F99D8740303B/2BF1CMC.jpg)
Unio douglasiae firmus. 28 Oct 20162
Size: 1909px × 1309px
Photo credit: © SBS Eclectic Images / Alamy / Afripics
License: Licensed
Model Released: No
Keywords: department, history, institution, invertebrate, museum, national, natural, smithsonian, zoology