Trirhabda canadensis
| Trirhabda canadensis | ||||||||||||
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Trirhabda canadensis |
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| Systematics | ||||||||||||
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| Scientific name | ||||||||||||
| Trirhabda canadensis | ||||||||||||
| ( Kirby , 1837) |
Trirhabda canadensis is a beetle in the leaf beetle family. Its range extends across the northern United States and southern Canada .
The small phytophagous insect lives mainly in the large prairie areas, where it is often found on the leaves of goldenrod . It reaches about 8 mm in length.
features
The antennae reach 3/4 of the body length. The antenna base, the first antenna element and the next three antenna elements are yellow with blackish ends. The color of the following antenna elements darkens to a dull black. The head is slightly conical, only slightly wider than long and decorated with three black spots on the top. The mouthparts are dark in color, the eyes black, of medium size and slightly protruding. The pronotum is larger than the head, and indented in the middle, it is adorned with three thick black dots.
When closed, the upper wings take the form of a pointed arch, with the outer lines being convex. They are also marked with three black longitudinal bands that converge at the end of the body, which is a special feature of the species. The feet are yellow-brown, slightly darker at the base of the limbs. The rail is drawn with a thin longitudinal dark brown band.
Similar species
Trirhabda canadensis is easily confused with some other species. This includes:
- Trirhabda borealis with narrower bands;
- Trirhabda adela , a species common in southern Québec , but rarer;
- Trirhabda virgata with a band that does not converge at the end of the body.
gallery
Individual evidence
- Riley, Edward G., Shawn M. Clark, and Terry N. Seeno (2003): Catalog of the leaf beetles of America north of Mexico (Coleoptera: Megalopodidae, Orsodacnidae and Chrysomelidae, excluding Bruchinae) , Coleopterists Society Special Publication no.1
- Bisby FA, Roskov YR, Orrell TM, Nicolson D., Paglinawan LE, Bailly N., Kirk PM, Bourgoin T., Baillargeon G., Ouvrard D. (red.) (2011): Species 2000 & ITIS Catalog of Life: 2011 Annual Checklist . Species 2000: Reading, UK. Ginkità dida han September 24, 2012.
- ITIS: The Integrated Taxonomic Information System . Orrell T. (custodian), April 26, 2011