Orchestes betuleti
This record describes Orchestes betuleti (species). Recorded family: Curculionidae. Recorded order: Coleoptera.
Identification and Appearance
Orchestes betuleti is a very small (about 2.5mm) weevil associated with Elm. It may vary from orange-red to darker red. The unmarked elytra, head, legs and rostrum are all red. The larvae mine the mature leaves of Elm (see ‘Life History’ section below). Orchestes alni is a similar weevil and is also associated with Elm, but Orchestes alni is usually larger than Orchestes betuleti and the elytra are usually marked with black. O. alni also typically has black head and rostrum and at least part of the legs is also usually black. Strongly associated with Elm and likely to occur in areas where Elm is present. The larvae are usually present in the leafmines from July to August, with adults emerging in August. Around June the egg is laid on an Elm leaf, on the underside of a strong vein. The leafmine then develops as a narrow corridor that runs from the vein towards the edge of the leaf where it widens into a large blotch. The frass is concentrated in the centre of the mine forming a dark spot. The larva pupates in a cocoon inside the mine. Orchestes betuleti was recorded in Britain for the first time in Bedfordshire in May 2023, but subsequent searches of specimen collections have found examples dating back to 2018. All British adults up to 2024 were from Bedfordshire. http://www.leafmines.co.uk/html/Coleoptera/o.betuleti.htm https://bladmineerders.nl/parasites/animalia/arthropoda/insecta/coleoptera/polyphaga/cucujiformia/curculionoidea/curculionidae/curculioninae/rhamphinini/orchestes/orchestes-betuleti/
Classification
- Kingdom
- Animalia
- Phylum
- Arthropoda
- Class
- Insecta
- Order
- Coleoptera
- Family
- Curculionidae
- Genus
- Orchestes
Imported taxonomy record. Source availability varies; see the source references and editorial policy below.
Habitat and Range
Habitat
Strongly associated with Elm and likely to occur in areas where Elm is present.
Seasonal Activity
The larvae are usually present in the leafmines from July to August, with adults emerging in August.
Diet and Behavior
Life History
Around June the egg is laid on an Elm leaf, on the underside of a strong vein. The leafmine then develops as a narrow corridor that runs from the vein towards the edge of the leaf where it widens into a large blotch. The frass is concentrated in the centre of the mine forming a dark spot. The larva pupates in a cocoon inside the mine.
Additional species information
Recorded status
Orchestes betuleti was recorded in Britain for the first time in Bedfordshire in May 2023, but subsequent searches of specimen collections have found examples dating back to 2018. All British adults up to 2024 were from Bedfordshire.
About Primitive Winged Insects: the wider group
Order-level background for Coleoptera, the group containing Orchestes betuleti. Species-specific details appear above.
Group overview
Coleoptera is the largest order of insects with over 400,000 described species, representing ~25% of all known animal species and ~40% of all insects. In the U.S. alone, nearly 30,000 beetle species have been identified.
Ecological role of the group
Beetles are prominent decomposers, especially in forests, breaking down dead wood and recycling nutrients. As predators, they reduce populations of pest insects. Many species are also important pollinators of flowering plants.
Economic and practical significance of the group
Beetles have major economic significance: leaf beetles (Chrysomelidae) and weevils (Curculionoidea) are among the most destructive agricultural pests globally, costing billions annually, while predatory species like ladybugs provide natural pest control.
Recorded sources for this group: Britannica, Smithsonian, NCSU Entomology. Imported estimates may describe particular regions or reporting periods.
Photos of Orchestes betuleti (3)
Frequently Asked Questions About Orchestes betuleti
What is Orchestes betuleti?
Orchestes betuleti is a species in the family Curculionidae, within the order Coleoptera.
Where is Orchestes betuleti found?
Habitat: Strongly associated with Elm and likely to occur in areas where Elm is present.
When is Orchestes betuleti active?
Orchestes betuleti: seasonal activity - The larvae are usually present in the leafmines from July to August, with adults emerging in August..
What is the life cycle of a Orchestes betuleti?
Around June the egg is laid on an Elm leaf, on the underside of a strong vein. The leafmine then develops as a narrow corridor that runs from the vein towards the edge of the leaf where it widens into a large blotch. The frass is concentrated in the centre of the mine forming a dark spot. The larva pupates in a cocoon inside the mine.