Elm-associated
Guides
Agrilus audax
Audacious Elm Agrilus
Agrilus audax is a large, striking jewel beetle in the family Buprestidae, distinguished by its black elytra and red pronotum with a densely pubescent median channel. First described from Texas in 1891, it remained exceptionally rare for over a century, with confirmed records from only a handful of specimens across Texas, Arizona, Missouri, Oklahoma, and Ohio. The species is associated with hardwood trees, particularly bur oak (Quercus macrocarpa) and slippery elm (Ulmus rubra), and is considered one of the most elusive North American buprestids.
Coleophora badiipennella
Pale Elm Case-bearer
Coleophora badiipennella is a small case-bearing moth in the family Coleophoridae, first described by Duponchel in 1843. It is widely distributed across Europe and has been introduced to North America. The species is associated with several deciduous tree genera, particularly elms. Adults are active in early summer.
Cosmia
pinion moths
Cosmia is a genus of noctuid moths comprising approximately 35 described species distributed across the Palaearctic region. The genus includes notable species such as the dun-bar (C. trapezina), lunar-spotted pinion (C. pyralina), and white-spotted pinion (C. diffinis). Several species are associated with elm trees, and at least one species (C. pyralina) has experienced population decline in Britain linked to Dutch elm disease affecting its host plants. The genome of C. pyralina has been sequenced, revealing a 803.3 Mb assembly with 31 chromosomal pseudomolecules.
Dicerca asperata
Dicerca asperata is a metallic wood-boring beetle in the family Buprestidae, distinguished by its shiny, brassy coloration and intricate surface sculpturing. Adults have been documented overwintering in bark crevices of dead American elm trees in Ohio. The species occurs in North America, with records from the United States and Canada (Ontario, Québec).
Magdalis barbita
Black Elm Bark Weevil
Magdalis barbita is a species of wedge-shaped bark weevil in the family Curculionidae. The common name 'black elm bark weevil' suggests an association with elm trees (Ulmus species). As a member of the genus Magdalis, it belongs to a group of bark weevils that develop in woody plants. The species has been documented in limited observations, with only 12 records on iNaturalist.
Ossiannilssonola ulmi
Ossiannilssonola ulmi is a species of leafhopper in the family Cicadellidae, subfamily Typhlocybinae. The species was described by Hamilton in 1982 and is named after its association with elm trees (Ulmus). It belongs to a genus of small, often inconspicuous leafhoppers that feed on plant phloem. Distribution records indicate presence in northeastern North America including parts of Canada and the northern United States.
Ribautiana ulmi
Ribautiana ulmi is a typhlocybine leafhopper in the family Cicadellidae, first described by Linnaeus in 1758. It is associated with elm trees (Ulmus), particularly wych elm (Ulmus glabra). Research has documented its distribution patterns within tree canopies, showing preference for more illuminated areas and basal leaves of branches. The species feeds selectively on palisade mesophyll cells.