| Psephenus | |
|---|---|
 | |
| Psephenus herricki | |
Scientific classification  | |
| Domain: | Eukaryota |
| Kingdom: | Animalia |
| Phylum: | Arthropoda |
| Class: | Insecta |
| Order: | Coleoptera |
| Suborder: | Polyphaga |
| Infraorder: | Elateriformia |
| Family: | Psephenidae |
| Subfamily: | Psepheninae |
| Genus: | Psephenus Haldeman, 1853 |
Psephenus is a genus of water penny beetles in the family Psephenidae. There are about 13 described species in Psephenus. [1] [2] [3]
These 13 species belong to the genus Psephenus:
A water beetle is a generalized name for any beetle that is adapted to living in water at any point in its life cycle. Most water beetles can only live in fresh water, with a few marine species that live in the intertidal zone or littoral zone. There are approximately 2000 species of true water beetles native to lands throughout the world.
Byrrhoidea is a superfamily of beetles belonging to Elateriformia that includes several families which are either aquatic or associated with a semi-aquatic habitat. Other than the superfamily Hydrophiloidea, most of the remaining Polyphagan beetles which are aquatic are in this superfamily.
Water-penny beetles are a family of 273 species of aquatic beetles found on all continents except Antarctica, in both tropical and temperate areas. The young, which live in water, resemble tiny pennies. The larvae feed – usually nocturnally – on algae on rock surfaces. The presence of water-penny larvae in a stream can be used as a test for the quality of the water, as they are pollution-sensitive. They cannot live in habitats where rocks acquire a thick layer of algae, fungi, or inorganic sediment. Therefore, their presence along with other diverse phyla signifies good-quality water. They are around 6 to 10 millimeters in length.
Eubriinae is an aquatic beetle subfamily in the family Psephenidae.
Harley Procter Brown Jr. was an American biologist and an expert in certain types of aquatic beetles. He described over forty new species in his career.
Psephenus falli is a species of water penny beetle in the family Psephenidae. It is found on the west coast of North America.
Psephenus herricki is a species of water penny beetle in the family Psephenidae. It is found in eastern North America.
Dicranopselaphus variegatus, the variegated false water penny beetle, is a species of water penny beetle in the family Psephenidae. It is found in North America.
Dicranopselaphus is a genus of water-penny beetles in the family Psephenidae. There are over 40 described species in Dicranopselaphus, distributed in Asia and North America.
Ectopria leechi is a species of water penny beetle in the family Psephenidae. It is found in North America.
Ectopria is a genus of water penny beetles in the family Psephenidae. There are about nine described species in Ectopria.
Acneus quadrimaculatus is a species of water penny beetle in the family Psephenidae. It is found in North America.
Acneus is a genus of water penny beetles in the family Psephenidae. There are four described species in Acneus.
Pelonomus is a genus of long-toed water beetles in the family Dryopidae. There are about five described species in Pelonomus.
Eubrianax edwardsii is a species of water penny beetle in the family Psephenidae. It is found in North America.
Eubrianax is a genus of water penny beetles in the family Psephenidae. There are about 12 described species in Eubrianax.
Psephenus texanus, the Texas water penny, is a species of water penny beetle in the family Psephenidae. It is found in Texas and northeastern Mexico.
Acneus beeri is a species of water penny beetle in the family Psephenidae. It is known from a single female specimen that was collected east of Cascadia, Oregon in July 1940.
Acneus burnelli is a species of water penny beetle in the family Psephenidae. It was described from a single male specimen that was collected southwest of Powers, Oregon in July 1960 by B. B. Burnell.
Acneus oregonensis is a species of water penny beetle in the family Psephenidae. It is known to occur in Oregon and was described from a specimen collected at Multnomah Falls.
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