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Genus Isarthrus

False Click Beetle - Isarthrus rufipes - male false click beetle - Isarthrus calceatus Isarthrus rufipes False Click Beetle - Isarthrus calceatus Isarthrus calceatus Isarthrus calceatus Isarthrus rufipes Elateridae - Isarthrus calceatus
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
Tribe Macraulacini
Genus Isarthrus
Only two species are known for the group endemic to the Nearctic region.
4.0-8.0 mm long.
A very difficult group to define, in relation to other Macraulacine genera. Muona (2000) defined the group based on longer than wide pronotum, simple claws and antennal grooves.


1 Antennal grooves deep and parallel...............................................................I. calceatus (Say)
1' Antennal grooves shallow and widest in the middle...........................................I. rufipes (Melsheimer)
Mainly distributed through much of the eastern U.S. and Canada.
Largely found in forested areas.
Early June through the middle of August.
Larvae utilized logs of both conifer and deciduous tree species to develop.
Life Cycle
Development usually take up to three years to complete. E. Mosher documented the larval type and natural history.
Print References
Muona, J. 2000. A Revision of the Nearctic Eucnemidae. Acta Zoologica Fennica. 212: 106 pp.