Isognomon
Isognomon is a genus of saltwater bivalve mollusks in the family Isognomonidae. They are commonly known as “winged oysters” due to their distinctive, fan-shaped shells. Isognomon species are found in tropical and subtropical waters worldwide, attaching themselves to hard surfaces like rocks, coral reefs, and mangrove roots. They are filter feeders, consuming plankton and other microscopic organisms.
Characteristics
Isognomon oysters are characterized by their irregular, elongated shells that can grow up to 15 centimeters in length. The shells are thin and often have a rough, textured surface. The hinge line is long and straight, with a prominent "wing" on each side. The interior of the shell is pearly, with a distinctive, iridescent sheen.
Environment
Isognomon species prefer warm, shallow waters with ample sunlight and a steady supply of plankton. They are often found in intertidal zones, estuaries, and coral reefs. Some species can tolerate brackish water, while others are strictly marine.
Common Names
Isognomon oysters are known by various common names depending on the region and species. Some of the most common names include:
- Winged oyster
- Fan oyster
- Hammer oyster
- Oyster with wings
References
For more information on Isognomon, refer to these reliable online sources: