Ironclad ID is designed to aid in the identification of adult ironclad and cylindrical bark beetles, a large, worldwide group of diverse, subcortical beetles in the family Zopheridae. This group is thought to include both harmful and beneficial species. Some members (Bitoma, Colobicus, Synchita, etc.) have been associated with particular fungi known to harm or kill valuable hardwood trees, while other members (Aulonium, Colydium, Nematidium, etc.) are thought to be predaceous on the larvae and adults of other destructive, wood-boring beetle pests. This tool covers ironclad and cylindrical bark beetles occurring in all 50 U.S. states and Canada.
In 2026, USDA-APHIS-PPQ-S&T, Pest Identification Technology Lab (PITL), Identification Technology Program (ITP) migrated the tool's content from a static site last updated in 2015 to ITP's Fact Sheet Manager 3, a content-management system. Content was minimally updated to fix minor grammatical errors, reference format, links, and taxonomy following Ivie et al. (2016)Ivie et al. (2016):
Ivie MA, Lord NP, Foley IA, Slipinski SA. 2016. Colydiine genera (Coleoptera: Zopheridae: Colydiinae) of the New World: A key and nomenclatural acts 30 years in the making. The Coleopterists Bulletin 70(4):755–788.; two new species (Rhagodera costaefragmenta Krinksky, 2015 and Bulasconotus scaccarius Bernard & Gillett 2020) were not added.
Authors: Lord NP, Nearns EH, Miller KB. 2011–2015.
Content updated Apr 2015; taxonomy updated Feb 2026
idtools.org
