Hinge & muscle scars. Original drawing based on a specimen in the Field Museum of Natural History.

Licence: 
Creative Commons Licence
Description: 

Photographer: Kanellos, Lisa (artist). Publisher: Mikkelsen, Paula.

Creator: 
www.bivatol.org
Taxonomic name: 
Unio pictorum (Taxonomy)
Scratchpads developed and conceived by (alphabetical): Ed Baker, Katherine Bouton Alice Heaton Dimitris Koureas, Laurence Livermore, Dave Roberts, Simon Rycroft, Ben Scott, Vince Smith