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Jewel Weevil (Eurhinus magnificus)


Detailing the physical features, habits, territorial reach and other identifying qualities of the Jewel Weevil



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Image Credit: Tyler Q. taken in Miami, FL
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Image Credit: Tyler Q. taken in Miami, FL
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The Jewel Weevil is a bright and gleaming newcomer to North America that looks better than it behaves.



Updated: 07/06/2021; Authored By Staff Writer; Content ©www.InsectIdentification.org
A native to countries in Central America, the Jewel Weevil started making appearances in Florida in 2002. It was first seen in a plant nursery for ornamental plants and then again on a shipment of bananas the year after. Since then, the frequency of sightings and its numbers increased. Now the species is well established in Florida's Miami-Dade and Broward counties. Their preferred host plant is the possum grape vine (also called princess vine). It is still unknown if this insect will threaten other vine plants, like grapevines grown in Florida. The Jewel Weevil has no known biological controls yet, so research is needed in both areas.

Females embed a fertilized egg into the stem of the plant and a gall will form as the plant swells around the egg. Galls are swollen, round bumps on a stem. If cut open before hatching, eggs will be visible inside the gall. Galls on this plant made by this particular species can grow to almost a centimeter in diameter on the stem. Softer, younger parts of a stem are prime targets for infiltration. The larvae molt and pupate while inside their galls and emerge as adults. Adults feed on the plant's stems and leaf petioles and then repeat the reproduction cycle. This insect's feeding and breeding activity can choke stems trying to move nutrients. The weight of the galls can even cause them to break.




General Characteristics
Capability, Shape, Texture/Pattern, Benefits, Dangers
Garden pest insect icon
Pest insect icon
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Taxonomic Hierarchy
Species Breakdown
Kingdom: Animalia
  Phylum: Arthropoda
    Class: Insecta
      Order: Coleoptera
        Family: Curculionidae
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          Genus: Eurhinus
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            Species: magnificus
Identifying Information
Size, Colors, Features
Scientific Name: Eurhinus magnificus
Category: Beetle
Size (Adult; Length): 4mm to 6mm (0.15" to 0.23")
Colorwheel Graphic Colors: green, red, copper, yellow, black
Descriptors: rainbow, multicolored, colorful, metallic, shiny, snout, nose, trunk, garden pest
Relative Size Comparison
Typical Size Between 4mm (0.2in) and 6mm (0.2in)
Lo: 4mm
Md: 5mm
Hi: 6mm
Territorial Map*
U.S., Canada, and Mexico
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Territory map graphic of the country of Mexico
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Alaska  
Hawaii  
Prince Edward Is.  
* MAP NOTES: The territorial heat map above showcases (in red) the states and territories of North America where the Jewel Weevil may be found (but is not limited to). This sort of data is useful when attempting to see concentrations of particular species across the continent as well as revealing possible migratory patterns over a species' given lifespan. Some insects are naturally confined by environment, weather, mating habits, food resources and the like while others see widespread expansion across most, or all, of North America. States/Territories shown above are a general indicator of areas inhabited by the Jewel Weevil. Insects generally go where they please, typically driven by diet, environmental changes, and / or mating habits.

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