Psephenidae
Guides
Acneus
water-penny beetles
Acneus is a genus of water-penny beetles (family Psephenidae) containing four described species. The genus is characterized by flattened, oval larvae that cling to submerged rocks in flowing water. Adults are terrestrial and rarely encountered. The genus was established by Horn in 1880 and is restricted to western North America.
Dicranopselaphus
water-penny beetles
Dicranopselaphus is a genus of water-penny beetles in the family Psephenidae, comprising over 40 described species. The genus exhibits a disjunct distribution spanning Asia and North America. Members are aquatic beetles with distinctive flattened, oval larval forms adapted to clinging to submerged surfaces in flowing water.
Dicranopselaphus variegatus
variegated false water penny beetle
Dicranopselaphus variegatus is a species of water penny beetle in the family Psephenidae, commonly known as the variegated false water penny beetle. The species was described by George Henry Horn in 1880. Like other members of Psephenidae, adults are terrestrial while larvae are aquatic, living on submerged rocks and logs in flowing water. It is found in North America.
Ectopria leechi
water penny beetle
Ectopria leechi is a species of water penny beetle in the family Psephenidae, first described by Brigham in 1981. The species is found in North America, with documented occurrences in Ontario, Canada. Like other members of Psephenidae, the larvae are aquatic and have a distinctive flattened, circular body form. Adult beetles are terrestrial.
Eubrianax edwardsii
water penny beetle
Eubrianax edwardsii is a species of water penny beetle in the family Psephenidae, found in North America. Water penny beetles are aquatic insects with flattened, disc-shaped larvae that cling to rocks in streams and rivers. The family Psephenidae is a small group of beetles specialized for life in flowing freshwater habitats.
Psephenus falli
Western Water Penny Beetle
Psephenus falli is a species of water penny beetle in the family Psephenidae. It is known from the west coast of North America. Like other members of its family, the larvae are aquatic and have a distinctive flattened, disc-like form that gives the group its common name. The species was described by Thomas Casey in 1893.