×
BugFinder Insects by State Spiders Butterflies & Moths Bees, Ants, & Wasps Beetles All Bugs Videos (YouTube)

Water Penny (Psephenus spp.)


Detailing the physical features, habits, territorial reach and other identifying qualities of the Water Penny



Loading SVG image placeholder
1/1
Image Credit: Alex -icycatelf- Bowen
Full-sized image of the Water-Penny-Beetle Thumbnail image of the Water-Penny-Beetle

Water Pennies have larvae that look more like crustaceans or fossils than beetles.



Updated: 05/19/2020; Authored By Staff Writer; Content ©www.InsectIdentification.org
An adult Water Penny looks like many types of beetle: six legs, black body, shiny, and small. Its larval stage looks quite unlike most beetle larvae. Instead of a worm-like, white grub with a brown head curling in the soil, this larva looks like a legless oval and is aquatic. Its copper color, round shape, and water habitat helped coin its common name. It is often compared to a trilobite, whose fossil is a similar shape with armor plating. Young Water Pennies are often found clinging to underwater stones and rocks in well-circulated streams, rivers, and lakeshores. They may even hold fast to sunken wood. Feathery gills allow them to breathe. Legs are hidden under the ?shell? and have scrapers used to nibble algae on the substrate they adhere to. They also eat decaying organic matter in the water. Once in adult form, they live on land, but near the water they came from.

The presence of Water Pennies signifies good water quality. In unhealthy, polluted streams that have overgrown algae or deep sediment, their ability to cling to stones and rocks is compromised, so they cannot establish a population. Looking for Water Pennies in shallow water can be fun for those who don?t mind getting their feet wet.




General Characteristics
Capability, Shape, Texture/Pattern, Benefits, Dangers
Rounded insect body icon




Taxonomic Hierarchy
Species Breakdown
Kingdom: Animalia
  Phylum: Arthropoda
    Class: Insecta
      Order: Coleoptera
        Family: Psephenidae
View More
          Genus: Psephenus
View More
            Species: spp.
Identifying Information
Size, Colors, Features
Scientific Name: Psephenus spp.
Category: Beetle
Size (Adult; Length): 4mm to 6mm (0.15" to 0.23")
Colorwheel Graphic Colors: brown; black
Descriptors: round; shell; stuck; horseshoe crab-like; underwater; fossil; trilobite
Relative Size Comparison
Typical Size Between 4mm (0.2in) and 6mm (0.2in)
Lo: 4mm
Md: 5mm
Hi: 6mm
Territorial Map*
U.S., Canada, and Mexico
State of Alabama graphic
State of Arizona graphic
State of Arkansas graphic
State of California graphic
State of Colorado graphic
State of Delware graphic
State of Florida graphic
State of Georgia graphic
State of Idaho graphic
State of Illinois graphic
State of Indiana graphic
State of Iowa graphic
State of Kansas graphic
State of Kentucky graphic
State of Louisiana graphic
State of Maine graphic
State of Maryland graphic
State of Michigan graphic
State of Minnesota graphic
State of Mississippi graphic
State of Missouri graphic
State of Montana graphic
State of Nebraska graphic
State of Nevada graphic
State of New England graphic
State of New Jersey graphic
State of New Mexico graphic
State of New York graphic
State of North Carolina graphic
State of North Dakota graphic
State of Ohio graphic
State of Oklahoma graphic
State of Oregon graphic
State of Pennsylvania graphic
State of South Carolina graphic
State of South Dakota graphic
State of Tennessee graphic
State of Texas graphic
State of Utah graphic
State of Virginia graphic
State of Washington graphic
State of West Virginia graphic
State of Wisconsin graphic
State of Wyoming graphic
Canadian territory of Alberta graphic
Canadian territory of British Columbia graphic
Canadian territory of Manitoba graphic
Canadian territory of New Brunswick graphic
Canadian territory of Newfoundland and Labrador graphic
Canadian territory of Ontario graphic
Canadian territory of Quebec graphic
Canadian territory of Saskatchewan graphic
Territory map graphic of the country of Mexico
Contiguous United States shape map layer graphic
Alaska  
Hawaii  
Prince Edward Is.  
* MAP NOTES: The territorial heat map above showcases (in red) the states and territories of North America where the Water Penny may be found (but is not limited to). This sort of data is useful when attempting to see concentrations of particular species across the continent as well as revealing possible migratory patterns over a species' given lifespan. Some insects are naturally confined by environment, weather, mating habits, food resources and the like while others see widespread expansion across most, or all, of North America. States/Territories shown above are a general indicator of areas inhabited by the Water Penny. Insects generally go where they please, typically driven by diet, environmental changes, and / or mating habits.

Site Disclaimer  |  Privacy Policy  |  Cookies  |  Sitemap


Beetle Identification Butterfly Identification Caterpillar Identification Spider ID

www.InsectIdentification.org • Content ©2006- InsectIdentification.org • All Rights Reserved. The InsectIdentification.org logo, its written content, and watermarked photographs/imagery are unique to this website (unless where indicated) and is protected by all applicable domestic and international intellectual property laws. This resource uses publically-released information. Material presented throughout this website is for entertainment value and should not to be construed as usable for scientific research or medical advice (regarding bites, etc...).Please consult licensed, degreed professionals for such information. By submitting images to us (InsectIdentification.org) you acknowledge that you have read and understood our Site Disclaimer as it pertains to "User-Submitted Content". When emailing please include your location and the general estimated size of the specimen in question if possible. Please direct all inquiries and comments to insectidentification AT gmail.com.

www.InsectIdentification.org • All Rights Reserved • Content ©2006-

Facebook Logo YouTube Logo