Pachybrachis turgidicollis
This record describes Pachybrachis turgidicollis (species). Recorded family: Chrysomelidae. Recorded order: Coleoptera.
Identification and Appearance

Black or fuscous and yellow maculate, the darker color predominating. Eyes separated by a distance distinctly less than, in the male, or, in the female, subequal to the vertical width of their upper lobes; front without ocular lines. Prothorax strongly inflated behind the middle especially in the male; elytral shield large and conspicuous; front claws of male much enlarged.
Wikipedia reference for Pachybrachis turgidicollis: https://en.wikipedia.org/wiki/Pachybrachis turgidicollis.
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
Habitat
mostly collected in western mtns (BG data)
Geographic Range
AZ to w. & s. TX (BG data)
Seasonal Activity
May-July (BG data)
Diet and Behavior
Life History
taken in asso. w/ whitethorn acacia ( Vachellia (=Acacia) constricta , Fabaceae) ( 4 ) - Range also beaten from foliage of catclaw acacia ( Senegalia (= Acacia ) greggii , Fabaceae) (BG data) - Range
Additional species information
Species notes from the sources
Etymology: Pachybrachis turgidicollis Fall 1915
About Primitive Winged Insects: the wider group
Order-level background for Coleoptera, the group containing Pachybrachis turgidicollis. 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 turgidicollis (5)
Photo credits: (c) Mike Quinn, San Marcos, some rights reserved (CC BY-NC), uploaded by Mike Quinn, San Marcos | Contributed by Mike Quinn
Frequently Asked Questions About Pachybrachis turgidicollis
What is Pachybrachis turgidicollis?
Pachybrachis turgidicollis is a species in the family Chrysomelidae, within the order Coleoptera.
How big is Pachybrachis turgidicollis?
Length 3.7 to 3.8 mm (Ave 3.75 mm)
How do you identify Pachybrachis turgidicollis?
Black or fuscous and yellow maculate, the darker color predominating. Eyes separated by a distance distinctly less than, in the male, or, in the female, subequal to the vertical width of their upper lobes; front without ocular lines. Prothorax strongly inflated behind the middle especially in the male; elytral shield large and conspicuous; front claws of male much enlarged.
Where is Pachybrachis turgidicollis found?
| Feature | Details |
|---|---|
| Habitat | mostly collected in western mtns (BG data) |
| Range | AZ to w. & s. TX (BG data) |
When is Pachybrachis turgidicollis active?
Pachybrachis turgidicollis: seasonal activity - May-July (BG data).
What is the life cycle of a Pachybrachis turgidicollis?
taken in asso. w/ whitethorn acacia ( Vachellia (=Acacia) constricta , Fabaceae) ( 4 ) - Range also beaten from foliage of catclaw acacia ( Senegalia (= Acacia ) greggii , Fabaceae) (BG data) - Range
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