Ponderous Borer vs Japanese Water Penny
Side-by-side species comparison
| Attribute | Ponderous Borer | Japanese Water Penny |
|---|---|---|
| Scientific Name | Trichocnemis spiculatus | Eubrianax granicollis |
| Order | Coleoptera | Coleoptera |
| Family | Cerambycidae | Psephenidae |
| Size | 40-60 mm | 5-7 mm |
| Habitat | Ponds & Lakes | Forests |
| Diet | Wood Feeders | Omnivores |
| Regions | Western United States, British Columbia | Japan, Taiwan |
| Conservation | Least Concern | Least Concern |
Ponderous Borer
One of the largest cerambycids in North America, this prionine breeds in the roots and lower trunks of dead ponderosa pines. Adults are dark brown with a somewhat rough body surface. They are nocturnal and attracted to lights.
Did You Know?
Larval development can take up to six years in dry dead wood, one of the longest development times for any beetle.
Japanese Water Penny
An East Asian water penny beetle found in swift forest streams of Japan. Adults are dark and robust with a granular pronotum.
Did You Know?
Its larvae use a suction-cup-like ventral surface to maintain their grip on stones in powerful currents.