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Genus Euryptychus

Euryptychus heterocerus Euryptychus arizonicus (Van Dyke) - Euryptychus arizonicus - female Euryptychus ulkei Horn - Euryptychus ulkei - male
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
Genus Euryptychus
Synonyms and other taxonomic changes
(=Dyscolocerus Bonvouloir, 1871)
Numbers
World-wide, approximately 22 extant species are known for the group. Greatest diversity are found in Australia. Of those 22 species, three are present in the Nearctic region.
Size
6.0-12.5 mm long.
Identification
The group can be identified by the elongate termminal three antennal segments and simple fourth tarsomeres.


Key

1 Larger size, brown coloration and eastern distribution............................................................2
1' Smaller size, black coloration and southwestern distribution...............................E. arizonicus (Van Dyke)

2 Basal third of pronotum is parallel-sided..........................................................E. ulkei (Horn)
2' Pronotum distinctly narrow from base to the front..............................................E. heterocerus (Say)
Range
One species is distributed in Arizona and New Mexico. Two others are present in Northeastern North America.
Habitat
Largely found in forested areas.
Season
Mid May through the end of August.
Food
Unknown.
Life Cycle
Unknown.
Remarks
The group can be confused with Phlegon, a primitve group restricted in the Neotropical region. They differ by the form of the fourth tarsomeres: excavate-emarginate in Phlegon, simple in Euryptychus.
Print References
Muona, J. 2000. A Revision of the Nearctic Eucnemidae. Acta Zoologica Fennica. 212: 106 pp.