Pachybrachis delumbis
This record describes Pachybrachis delumbis (species). Recorded family: Chrysomelidae. Recorded order: Coleoptera.
Identification and Appearance
Fall's description: In the male type the vertex spot is large, but the frontal spot is narrow and the front is mostly yellow; the thoracic M is quite distinct, attaining the apical third, the thorax predominantly yellow. Elytral spots rather small, the outer series and the posterior inner one distinct, two anterior spots of the inner series not defined; marginal interspace with two punctures just back of the strong sigmoidal dislocation of the eighth stria, and three more at the anal curve. Fall described this sp. from one Davis Mtn. spmn collected H. A. Wenzel, who later collected two more spmns from the nearby Chisos Mtns of w. TX.
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
Chisos and Davis Mtns of w. TX
Seasonal Activity
July
Additional species information
Species notes from the sources
Etymology: Pachybrachis delumbis Fall 1915
About Primitive Winged Insects: the wider group
Order-level background for Coleoptera, the group containing Pachybrachis delumbis. 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 Pachybrachis delumbis (5)
Photo credits: Contributed by Mike Quinn
Frequently Asked Questions About Pachybrachis delumbis
What is Pachybrachis delumbis?
Pachybrachis delumbis is a species in the family Chrysomelidae, within the order Coleoptera.
How big is Pachybrachis delumbis?
Length 2.4 to 3.4 mm
How do you identify Pachybrachis delumbis?
Fall's description: In the male type the vertex spot is large, but the frontal spot is narrow and the front is mostly yellow; the thoracic M is quite distinct, attaining the apical third, the thorax predominantly yellow. Elytral spots rather small, the outer series and the posterior inner one distinct, two anterior spots of the inner series not defined; marginal interspace with two punctures just back of the strong sigmoidal dislocation of the eighth stria, and three more at the anal curve.
Where is Pachybrachis delumbis found?
Range: Chisos and Davis Mtns of w. TX
When is Pachybrachis delumbis active?
Pachybrachis delumbis: seasonal activity - July.