Pilsbryoconcha is closely related to Pseudodon (sister, fide Pfeiffer & Graf, 2015) in SE Asia. Aquarists apparently know P. exilis as the tropical swan mussel or the Thai aquaria mussel. It seems to be common enough in the business that there is a YouTube video documenting the activity of the mussel in captivity.
Pilsbryoconcha is well represented in mollusk collections, and we have accumulated more than 200 specimen records in the MUSSEL Project Database, served from this site. In fact, the link below for Pilsbryoconcha exilis will take you directly to our specimen data, including a distribution map and pictures of the individual museum lots of that species. From that page, you can browse to the other species in the genus (as well as all the species in all the freshwater mussel genera). For each species, we provide both specimen records and taxonomic information.
The other link below to Pilsbryoconcha will take you to the ITIS.gov page for the genus. That website mirrors the current version of our database. These links are provided for each Mussel of the Month.
We hope that you can make good use of the MUSSELpdb. Watch this web site for upcoming updates on Pilsbryoconcha and the other genera of SE Asian freshwater mussels. | 
