ColeopteraChrysomelidae – Leaf Beetles

Pachybrachis gilberti

This record describes Pachybrachis gilberti (species). Recorded family: Chrysomelidae. Recorded order: Coleoptera.

Identification and Appearance

Pachybrachis gilberti - Pachybrachis gilberti
Contributed by Mike Quinn

recognized by its narrow shape, almost purple coloration with yellow highlights, and bulging eyes. Type Locality: ARIZ: Cochise Co. Cave Cr. / Cyn., 3 mi. W Portal VIII-9-[20]00, / 5120ft. A. Gilbert & N. Smith / 31o53.023′N -109o10.715′W

Classification

Kingdom
Animalia
Phylum
Arthropoda
Class
Insecta
Order
Coleoptera (Beetles)
Suborder
Polyphaga
Superfamily
Chrysomeloidea
Family
Chrysomelidae (Leaf Beetles)
Subfamily
Cryptocephalinae
Tribe
Cryptocephalini
Genus
Pachybrachis (Scriptured Leaf Beetles)

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

Habitat and Range

Geographic Range

se AZ / Mex.

Diet and Behavior

Life History

Mimosa aculeaticarpa, A. constricta , and Quercus sp. were noted on labels as potential host plants in Arizona.

Additional species information

Species notes from the sources

Etymology: Pachybrachis gilberti Barney 2019

About Primitive Winged Insects: the wider group

Order-level background for Coleoptera, the group containing Pachybrachis gilberti. 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.

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Frequently Asked Questions About Pachybrachis gilberti

What is Pachybrachis gilberti?

Pachybrachis gilberti is a species in the family Chrysomelidae, within the order Coleoptera.

How do you identify Pachybrachis gilberti?

recognized by its narrow shape, almost purple coloration with yellow highlights, and bulging eyes.

Where is Pachybrachis gilberti found?

Range: se AZ / Mex.

What is the life cycle of a Pachybrachis gilberti?

Mimosa aculeaticarpa, A. constricta , and Quercus sp. were noted on labels as potential host plants in Arizona.

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.