ColeopteraChrysomelidae – Leaf Beetles

Xanthonia vagans

This record describes Xanthonia vagans (species). Recorded family: Chrysomelidae. Recorded order: Coleoptera.

Identification and Appearance

Xanthonia vagans - Xanthonia vagans
Contributed by Mike Quinn

distinctive because of large size, greatly enlarged tooth of the anterior femur, clavate anterior tibiae ground color of dorsum medium to dark brownish, elytra usually with vague dark streaks (emphasis added) enhanced by arrangement of variable light and dark colored elytral hairs Det. E. G. Riley, 2010 species originally based on one specimen collected by Gustaf Belfrage in Texas (LeConte 1884), probably from the vicinity of Bosque County where Gustaf Belfrage lived from 1868 to 1882 (Geiser 1948). Riley et al. examined 384 total spmns across the sw.US / Mex.

Classification

Kingdom
Animalia
Phylum
Arthropoda
Class
Insecta
Order
Coleoptera (Beetles)
Suborder
Polyphaga
Superfamily
Chrysomeloidea
Family
Chrysomelidae (Leaf Beetles)
Subfamily
Eumolpinae
Tribe
Adoxini
Genus
Xanthonia

Imported taxonomy record. Source availability varies; see the source references and editorial policy below.

Habitat and Range

Geographic Range

AZ to c. TX / Sonora, Méx. Map , (the Utah record reported by Horn has not been verified )

Seasonal Activity

Apr-Aug (BG data)

Diet and Behavior

Diet: likely a juniper specialist ( Juniperus , Cupressaceae)

Life History

freq. comes to lights

Additional species information

Species notes from the sources

Etymology: vagan (L). 'wandering'

About Primitive Winged Insects: the wider group

Order-level background for Coleoptera, the group containing Xanthonia vagans. 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.

Explore Coleoptera families and species →

Photos of Xanthonia vagans (2)

Xanthonia vagans - photo 1
Contributed by Mike Quinn
Xanthonia vagans - photo 2
Contributed by Mike Quinn

Photo credits: Contributed by Mike Quinn

Frequently Asked Questions About Xanthonia vagans

What is Xanthonia vagans?

Xanthonia vagans is a species in the family Chrysomelidae, within the order Coleoptera.

How big is Xanthonia vagans?

Size large, length 3.8–5.2 mm

How do you identify Xanthonia vagans?

distinctive because of large size, greatly enlarged tooth of the anterior femur, clavate anterior tibiae ground color of dorsum medium to dark brownish, elytra usually with vague dark streaks (emphasis added) enhanced by arrangement of variable light and dark colored elytral hairs Det. E. G. Riley, 2010

Where is Xanthonia vagans found?

Range: AZ to c. TX / Sonora, Méx. Map , (the Utah record reported by Horn has not been verified )

What does Xanthonia vagans eat?

The diet of the Xanthonia vagans includes likely a juniper specialist ( Juniperus , Cupressaceae).

When is Xanthonia vagans active?

Xanthonia vagans: seasonal activity - Apr-Aug (BG data).

What is the life cycle of a Xanthonia vagans?

freq. comes to lights

How we use and review source data. Source count does not imply independent verification.

Photo credits: Contributed by Mike Quinn. Contributors retain copyright over their individual contributions.