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For Insects, Spiders & Their Kin
For the United States & Canada

Genus Onichodon

Onychodon orchesides Newman - Onichodon orchesides Onychodon canadensis - Onichodon canadensis Onychodon downiei - Onichodon downiei Onichodon rugicollis larva - Onichodon rugicollis false click beetle - Onichodon downiei > - Onichodon canadensis Onichodon wappesi - female Click at Porch - Onichodon orchesides
Classification
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 Onichodon
Numbers
Five species are known for the group, endemic in the Nearctic region.
Size
7.0-17.0 mm
Identification
Can be confused with Fornax and Diphytaxis. They differ by their simple elytrial epipleura and narrow lateral antennal grooves.


Key to species

1 Antennae sharply serrate..........................................................................................2
1' Antennae weakly to moderately serrate.............................................................................3

2 Basal elytrial interstices with coarse, separate granules......................................O. rugicollis (Fall)
2' Basal elytrial interstices with small, transversely joined granules...........................O. canadensis (Brown)

3 Antennae moderately serrate.......................................................................................4
3' Antennae weakly serrate............................................................................O. downiei Muona

4 Antennae slenderer.............................................................................O. orchesides Newman
4' Antennae stouter...................................................................................O. wappesi Muona
Range
Two species are widespread in eastern U.S. Third species has a more northern distribution. Last species is endemic in Texas.
Habitat
Largely found in forested areas.
Season
Mid May through the middle of August.
Food
Larvae are known to utilize logs of various types of deciduous tree species to develop.
Life Cycle
Larvae of O. canadensis, O. orchesides and O. rugicollis were described by R.L. Otto in 2013.
Print References
Muona, J. 2000. A Revision of the Nearctic Eucnemidae. Acta Zoologica Fennica. 212: 106 pp.

Otto, R.L. 2013. Eucnemid Larvae of the Nearctic Region. Part III: Mature Larval Descriptions for Three Species of Onichodon Newman, 1838 (Coleoptera: Eucnemidae: Macraulacinae: Macraulacini), with Notes on Their Biology. The Coleopterists Bulletin 67(2): 97-106.