Eulichadidae is a family of beetles belonging to Elateriformia. There are two extant genera, Eulichas with several dozen species native to the Indomalayan realm of Asia, and Stenocolus, with a single species native to Western North America. The larvae are aquatic, with the larvae of Eulichas being found in sandy sediments of clean forest streams, while the larvae of Stenocolus are found under rocks and in leaf packs in low elevation streams and rivers. They are herbivious/saprophagous with larval specimens of Eulichas having been found with wood particles in their stomachs, while the larvae of Stenocolus are known to feed on decaying roots and detritus. The adults are terrestrial, with specimens of Eulichas typically found using light, while specimens of Stenocolus are typically found in riparian vegetation, and are not attracted to light.^[1] Potential extinct genera have been described from Mesozoic rocks, but the placement of several of these taxa in the family is disputed.^[2][3]

Eulichadidae Temporal range: Recent PreꞒ Ꞓ O S D C P T J K Pg N ↓
A specimen, presumably of Eulichas, collected in Vietnam
Scientific classification
Domain:	Eukaryota
Kingdom:	Animalia
Phylum:	Arthropoda
Class:	Insecta
Order:	Coleoptera
Suborder:	Polyphaga
Infraorder:	Elateriformia
Superfamily:	Byrrhoidea
Family:	EulichadidaeCrowson, 1973 Genera edit These two extant genera belong to the family Eulichadidae: Eulichas Jacobson, 1913 Asia Stenocolus LeConte, 1853 North America Potential extinct genera edit Mesodascilla Martynov, 1926 Karabastau Formation, Kazakhstan, Late Jurassic (alternatively considered a member of Lasiosynidae) Cretasyne Yan, Wang & Zhang, 2013 Yixian Formation, China, Early Cretaceous (Aptian) (alternatively considered a member of Lasiosynidae) Mesaplus Hong, 1983 Haifanggou Formation, China, Middle Jurassic References edit ^ Ivie, Michael A.. "Eulichadidae Crowson, 1973: Coleoptera, Beetles". Handbook of Zoology Online, edited by Andreas Schmidt-Rhaesa. Berlin, Boston: De Gruyter, 2016. ^ Kirejtshuk A. G. (2013) Taxonomic names, in Current knowledge of Coleoptera (Insecta) from the Lower Cretaceous Lebanese amber and taxonomical notes for some Mesozoic groups, Terrestrial Arthropod Reviews 6, 103-134 ^ Kundrata, Robin; Gimmel, Matthew L.; Packova, Gabriela; Bukejs, Andris; Blank, Stephan M. (2021-05-21). "A new enigmatic lineage of Dascillidae (Coleoptera: Elateriformia) from Eocene Baltic amber described using X-ray microtomography, with notes on Karumiinae morphology and classification". Fossil Record. 24 (1): 141–149. doi:10.5194/fr-24-141-2021. ISSN 2193-0074. Further reading edit LeConte, J.L. (1861). Classification of the Coleoptera of North America. Smithsonian Miscellaneous Collections. Vol. 3. doi:10.5962/bhl.title.38459. ISBN 0665100558. Shepard, William D. (2002). Arnett, Ross H.; Thomas, Michael C.; Skelley, Paul E.; Frank, J. Howard (eds.). Family 51. Eulichadidae Crowson 1973. American Beetles, Volume II: Polyphaga: Scarabaeoidea through Curculionoidea. CRC Press. pp. 142–143. ISBN 0-8493-0954-9.