Identification, Images, & Information
For Insects, Spiders & Their Kin
For the United States & Canada
Clickable Guide
Moths Butterflies Flies Caterpillars Flies Dragonflies Flies Mantids Cockroaches Bees and Wasps Walkingsticks Earwigs Ants Termites Hoppers and Kin Hoppers and Kin Beetles True Bugs Fleas Grasshoppers and Kin Ticks Spiders Scorpions Centipedes Millipedes

Upcoming Events

Information, insects and people from the 2019 BugGuide Gathering in Louisiana, July 25-27

Discussion, insects and people from the 2018 gathering in Virginia, July 27-29

Photos of insects and people from the 2015 gathering in Wisconsin, July 10-12

Photos of insects and people from the 2014 gathering in Virginia, June 4-7.

Photos of insects and people from the 2013 gathering in Arizona, July 25-28

Photos of insects and people from the 2012 gathering in Alabama

Photos of insects and people from the 2011 gathering in Iowa


Genus Hemiopsida

Hemiopsida robusta (Van Dyke) - Hemiopsida robusta
Kingdom Animalia (Animals)
Phylum Arthropoda (Arthropods)
Subphylum Hexapoda (Hexapods)
Class Insecta (Insects)
Order Coleoptera (Beetles)
Suborder Polyphaga (Water, Rove, Scarab, Long-horned, Leaf and Snout Beetles)
No Taxon (Series Elateriformia)
Superfamily Elateroidea (Click, Firefly and Soldier Beetles)
Family Eucnemidae (False Click Beetles)
Subfamily Macraulacinae
Genus Hemiopsida
Synonyms and other taxonomic changes
(=Lycaon Blackburn, 1871, nec Brookes, 1827)
(=Neolycaon Blackburn, 1900)
World-wide, 15 species are known for the group. Greatest majority are distributed in the southern hemisphere from South-east Asia to Australia. Only one species is present in the Nearctic region.
6.5-8.5 mm long.
The group can be identified based on the long mandibles without a secondary tooth and simple hypomera.
Single species is a Californian endemic.
largely found in forested areas.
Early July through mid August.
Life Cycle
The Nearctic species is closely related to an extinct species found in Baltic amber (Muona, 1991 & 1993).
Print References
Muona, J. 2000. A Revision of the Nearctic Eucnemidae. Acta Zoologica Fennica. 212: 106 pp.