Tooth-Necked Fungus Beetle vs Pennsylvania Ground Beetle

Side-by-side species comparison

Attribute Tooth-Necked Fungus Beetle Pennsylvania Ground Beetle
Scientific Name Bolitotherus cornutus Harpalus pensylvanicus
Order Coleoptera Coleoptera
Family Tenebrionidae Carabidae
Size 10-12 mm 13-17 mm
Habitat Woodlands Farmland
Diet Fungus Feeders Omnivores
Regions Eastern North America North America
Conservation Least Concern Least Concern

Tooth-Necked Fungus Beetle

A heavily armored, warty brown beetle that feeds on shelf fungi on dead trees. Males have two prominent horns on the thorax.

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Did You Know?

It plays dead so convincingly that it is nearly impossible to distinguish from a piece of bark.

Pennsylvania Ground Beetle

One of the most common ground beetles in North American croplands. It is an omnivorous species that feeds on both seeds and small insects.

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Did You Know?

Studies show it can consume enough weed seeds to significantly reduce weed emergence in crop fields.