# Eucnemidae

Eucnemidae, or false click beetles, are a family of elateroid beetles based on the type genus Eucnemis; they include about 1700 species, distributed worldwide.

## Description

Closely related to the family Elateridae, specimens of Eucnemidae can reach a length of 2–30 mm (0.079–1.181 in). Bodies are slightly flattened and convex. The upper surfaces of the body usually has hairs, setae or scales.

## Ecology

The larvae are typically legless, and generally develop feeding on the fluids of rotting wood, likely vomiting digestive enzymes into the wood to break apart the fungal hyphae, moving using their shovel shaped heads to force apart the wood. Adults, which are typically found on broken surfaces of trunks and stumps, have a short lifespan and it is unclear whether they feed, though they are capable fliers, and like some other elateroids are capable of clicking.

## Taxonomy
### Extant Genera

The Global Biodiversity Information Facility includes:
* Acedax de Bonvouloir, 1875
* Achaica Muona, 1991
* Adelorhagus Horn, 1890
* Adelothyreus Chevrolat, 1868
* Adelothyreus Horn, 1890
* Agalba Broun, 1893
* Agastocerus de Bonvouloir, 1871
* Anabolodes Strand, 1928
* Anelastes Kirby, 1818
* Anelastidius Jacquelin du Val, 1860
* Anischia Fleutiaux, 1896
* Arganus de Bonvouloir, 1871
* Arhipis Bonvouloir, 1871
* Arisus de Bonvouloir, 1871
* Arrhipis Bonvouloir, 1871
* Aruanus Fleutiaux, 1902
* Asiocnemis Mamaev, 1976
* Aubailius Fleutiaux, 1921
* Balistica Motschulsky, 1861
* Baryus Fleutiaux, 1921
* Basilewskydia Cobos, 1959
* Bermillus de Bonvouloir, 1871
* Bioxylus Fleutiaux, 1923
* Bonvouloiriella Otto & Kovalev, 2013
* Bossionus Fleutiaux, 1922
* Bothrion Fleutiaux, 1921
* Buckia Cobos, 1956
* Buckiella Cobos, 1964
* Cafolus de Bonvouloir, 1875
* Calyptocerus Guérin, 1843
* Ceballosmelasis Cobos, 1965
* Ceratogonys Perty, 1830
* Ceratus Bonvouloir, 1871
* Chapianus Fleutiaux, 1921
* Chropoecilus Fleutiaux, 1902
* Cladidus Fleutiaux, 1918
* Cladoscython Fleutiaux, 1921
* Cladus Bonvouloir, 1871
* Clyeorhagus Olexa, 1975
* Clypeorhagus Olexa, 1975
* Cobosiantha Alonso-Zarazaga, 1998
* Cobosidea Chassain, 2015
* Compsocnemis de Bonvouloir, 1875
* Coomanius Fleutiaux, 1924
* Cretopityobius Otto, 2019
* Cryptostoma (beetle) Latreille, 1829
* Cupressicharis Muona, 2020
* Curtocephalus Fleutiaux, 1912
* Cylus Muona, 2020
* Cyrtostethus de Bonvouloir, 1872
* Deltometopus Bonvouloir, 1871
* Dendrocharis Guérin-Méneville, 1843
* Diacerus de Bonvouloir, 1871
* Diapodius de Bonvouloir, 1875
* Dictyeucnemis Lea, 1919
* Diphytaxis Horn, 1890
* Dirrhagofarsus Fleutiaux, 1935
* Discaptothorax Blackburn, 1900
* Dorsifornax Fleutiaux, 1926
* Dromaeocnemis de Bonvouloir, 1872
* Dromaeoloides Cobos, 1964
* Dromaeolus Kiesenwetter, 1858
* Dyscharachthis Blackburn, 1900
* Dyscolotaxia Horn, 1890
* Echthrogaster Blackburn, 1900
* Entomophthalmus Bonvouloir, 1871
* Entomosatopus de Bonvouloir, 1871
* Epiphanis Eschscholtz, 1829
* Epipleurus Fleutiaux, 1928
* Erdaia Muona, 1993
* Eucalodemas Bonvouloir, 1871
* Eucalosoma Laporte, 1840
* Eucnemis Ahrens, 1812
* Eudorus (beetle) Laporte, 1835
* Eurachis Horn, 1890
* Euryaulacus Bonvouloir, 1871
* Euryostus de Bonvouloir, 1871
* Euryptychoides Muona, 2021
* Euryptychus Leconte, 1852
* Falsothambus Muona, 2020
* Farsus Jacquelin du Val, 1860
* Feaia Fleutiaux, 1896
* Fiegelia Muona, 2020
* Fleutimelasa Otto & Kovalev, 2013
* Fornax Laporte, 1835
* Fornaxiella Cobos, 1965
* Freudenia Cobos, 1965
* Freyiola Cobos, 1965
* Fryanus Fleutiaux, 1902
* Gagatellus Fleutiaux, 1912
* Galbimorpha Fleutiaux, 1920
* Galbites Fleutiaux, 1918
* Galbodema Laporte, 1835
* Gastraulacus Guérin, 1843
* Golbachia Cobos, 1955
* Goudotus Fleutiaux, 1926
* Haywardinia Cobos, 1965
* Haywardius Cobos, 1958
* Hemiopsida MacLeay, 1873
* Henecocrus Bonvouloir, 1871
* Henecosoma Horn, 1890
* Heterotaxis de Bonvouloir, 1875
* Hodocerus de Bonvouloir, 1872
* Hylis Gozis, 1886
* Hylochares Latreille, 1834
* Hylotastella Fisher, 1945
* Hylotastes de Bonvouloir, 1875
* Hyperpalpus Lucht, 1990
* Hypocoelus Latreille, 1834
* Hyporrhagus Reitter, 1921
* Idiotarsus Bonvouloir, 1871
* Insulanus Fleutiaux, 1930
* Isarthrus LeConte, 1852
* Isoriphis Boisduval & Lacordaire, 1835
* Jenibuntor Muona, 1993
* Lacus (beetle) Bonvouloir, 1871
* Lamprotrichus Bonvouloir, 1871
* Langurioscython Heller, 1917
* Macraulacus de Bonvouloir, 1872
* Macroscython Fleutiaux, 1902
* Maelodrus Fleutiaux, 1928
* Mahatsinjus Fleutiaux, 1926
* Melanocoleus Bonvouloir, 1872
* Melanoscython Fleutiaux, 1926
* Melasis Olivier, 1790
* Melocarvalhosia Cobos, 1957
* Mesogenus Bonvouloir, 1871
* Microrhagus Dejean, 1833
* Microtrigonus Bonvouloir, 1871
* Modius (beetle) Fleutiaux, 1918
* Monrosina Cobos, 1958
* Muonaja Özdikmen, 2008
* Myall Muona, 1993
* Namolius Bonvouloir, 1875
* Nebulatorpidus Lucht, 1998
* Nematodes (beetle) Berthold, 1827
* Neocharis Sharp, 1877
* Neocharoides Muona, 2021
* Neodema Fleutiaux, 1921
* Neodiaeretus Cobos, 1956
* Neodiapodius Fisher, 1945
* Neofornax Cobos, 1958
* Neomathion Fleutiaux, 1930
* Neusiokia Muona, 2022
* Oisocerus Bonvouloir, 1868
* Olbrechtsia Cobos, 1959
* Onichodon Newman, 1838
* Onya Muona, 1993
* Orodotes Bonvouloir, 1875
* Otho (beetle) Lacordaire, 1857
* Pachyfornax Fleutiaux, 1902
* Palaeoxenus Horn, 1891
* Paleoeucnemis Muona, 2020
* Paradema Cobos, 1986
* Paraxylophilus Cobos, 1965
* Pereirella Cobos, 1956
* Perothops Eschscholtz, 1836
* Perrotius Fleutiaux, 1938
* Phaenobolus Horn, 1890
* Phaenocerus Bonvouloir, 1871
* Phanerochroeus Bonvouloir, 1871
* Phlegon (beetle) Laporte de Castelnau, 1840
* Phyllocerus Lepeletier & Serville, 1828
* Piestocera Perty, 1830
* Pinaroo Muona, 1993
* Plesiofornax Bonvouloir, 1866
* Plesiofornax Coquerel, 1866
* Pocoelus Fleutiaux, 1926
* Poecilochrus Bonvouloir, 1871
* Porraulacus Fleutiaux, 1896
* Potergites Britton, 1960
* Procladidus Fleutiaux, 1921
* Prodirhagus Fleutiaux, 1925
* Profornax Fleutiaux, 1896
* Prolycaon Fleutiaux, 1923
* Prosassanus Fleutiaux, 1945
* Protofarsus Muona, 2000
* Protomicrorhagus Muona, 2020
* Protovitellius Muona, 2020
* Proutianus Muona, 1993
* Proxylobius Fleutiaux, 1900
* Pseudochapianus Lucht, 1987
* Pseudodiaeretus Fleutiaux, 1902
* Pseudomenes Fleutiaux, 1902
* Pseudomyall Muona, 2020
* Pseudorhacopus Olexa, 1975
* Pseudoscython Fleutiaux, 1902
* Pseudotemnillus Muona, 2021
* Quirsfeldia Cobos, 1965
* Raapia Fleutiaux, 1899
* Rhacopus Hampe, 1855
* Rhagomicrus Fleutiaux, 1902
* Rheanischia Li, Chang & Muona, 2021
* Sakalavus Fleutiaux, 1926
* Saproxylobius Leiler, 1990
* Sarfus Fleutiaux, 1925
* Sarpedon (beetle) Bonvouloir, 1871
* Sassanus Fleutiaux, 1925
* Schizophilus Bonvouloir, 1871
* Scopulifer Fleutiaux, 1896
* Scython Laporte, 1835
* Semnodema Bonvouloir, 1875
* Serrifornax Fleutiaux, 1926
* Sieglindea Muona, 1993
* Silveriola Cobos, 1956
* Similifornax Fleutiaux, 1926
* Somahenecus Cobos, 1965
* Spinifornax Fleutiaux, 1926
* Stethon LeConte, 1866
* Submesogenus Fleutiaux, 1921
* Tacerus Fleutiaux, 1928
* Tachycnemis Bonvouloir, 1872
* Talerax Sharp, 1877
* Temnillus Bonvouloir, 1871
* Temnus Fleutiaux, 1920
* Thambus Bonvouloir, 1871
* Torigaia Hisamatsu & Sato, 1959
* Trigonopleurus Bonvouloir, 1875
* Vitellius (beetle) Bonvouloir, 1871
* Weyrauchiella Cobos, 1972
* Xylophilus (beetle) Mannerheim, 1823
* Xylotho Lucht, 1990
Note misplaced names: Aulacosternus Motschoulsky, 1861

### Fossil genera

* †Beattieellus Oberprieler et al. 2016 – Talbragar Fossil Bed, Australia, Late Jurassic (Tithonian)
* †Cenomana Otto, 2019 – Burmese amber, Myanmar, Late Cretaceous (Cenomanian)
* †Lissantauga Poinar 2013 – Dominican amber, Miocene
* †Muonabuntor Li, Tihelka & Cai, 2020 – Burmese amber, Myanmar, Cenomanian