Template:Psephenidae
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Psephenidae
- Order
- Coleoptera
- Family
- Psephenidae
The true "water penny" is commonly found in the waters sampled. Psephenus has a rounded shape with relatively smooth edge. The false water penny, whose edges are serrated, has a more oval appearance. The gills on the ventral surface are found only in the true water pennies.
