ColeopteraChrysomelidae – Leaf Beetles

Pachybrachis turgidicollis

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

Identification and Appearance

Pachybrachis turgidicollis - Pachybrachis turgidicollis
(c) Mike Quinn, San Marcos, some rights reserved (CC BY-NC), uploaded by Mike Quinn, San Marcos

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.

Explore Coleoptera families and species →

Photos of Pachybrachis turgidicollis (5)

Pachybrachis turgidicollis - photo 1
(c) Mike Quinn, San Marcos, some rights reserved (CC BY-NC), uploaded by Mike Quinn, San Marcos | Contributed by Mike Quinn
Pachybrachis turgidicollis - photo 2
(c) Mike Quinn, San Marcos, some rights reserved (CC BY-NC), uploaded by Mike Quinn, San Marcos | Contributed by Mike Quinn
Pachybrachis turgidicollis - photo 3
(c) Mike Quinn, San Marcos, some rights reserved (CC BY-NC), uploaded by Mike Quinn, San Marcos | Contributed by Mike Quinn
Pachybrachis turgidicollis - photo 4
(c) Mike Quinn, San Marcos, some rights reserved (CC BY-NC), uploaded by Mike Quinn, San Marcos | Contributed by Mike Quinn
Pachybrachis turgidicollis - photo 5
(c) Mike Quinn, San Marcos, some rights reserved (CC BY-NC), uploaded by Mike Quinn, San Marcos | Contributed by Mike Quinn

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?
FeatureDetails
Habitatmostly collected in western mtns (BG data)
RangeAZ 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

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

Photo credits: (c) Mike Quinn, San Marcos, some rights reserved (CC BY-NC), uploaded by Mike Quinn, San Marcos | Contributed by Mike Quinn. Contributors retain copyright over their individual contributions.