Mussel of the

Page last updated
6 June 2016

Mussel of the Month

The June 2016 Mussel of the Month is Pilsbryoconcha exilis. Pilsbryoconcha is a genus of five species from Indochina and the Sunda Islands of southeast Asia.

Pilsbryoconcha exilis
USNM 86726. Java? (type)

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 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.


Phylum Mollusca
Class Bivalvia
Subclass Palaeoheterodonta
Order Unionoida

Family UNIONIDAE Rafinesque, 1820
Subfamily GONIDEINAE Ortmann, 1916

Genus Pilsbryoconcha Simpson, 1900

Species Pilsbryoconcha exilis (Lea, 1838)

To find out more about Pilsbryoconcha and other Indotropical freshwater mussels:
  • Brandt, R.A.M. 1974. The non-marine aquatic Mollusca of Thailand. Archiv für Molluskenkunde, 105: 1-423.
  • Haas, F. 1969. Superfamilia Unionacea. Das Tierreich 88: 1-663.
  • Pfeiffer, J.M. & D.L. Graf. 2015. Evolution of bilaterally asymmetrical larvae in freshwater mussels (Bivalvia: Unionoida: Unionidae). Zoological Journal of the Linnean Society 175: 307-318.
NSF icon MUSSEL icon
"Making the world a better place, one mollusk at a time."