western conifer seed bug

(Leptoglossus occidentalis)

               
Conservation Status

IUCN Red List

not yet assessed

western conifer seed bug

NatureServe

not listed

Minnesota

not listed

Occurrence

Common and widespread

Flight/Season

One generation per year: Late May to the onset of cold weather in the fall

Habitat

Conifer trees

Size

Total Length: to ¾

   
   
   
    Photo by Emily

Identification

This is a to ¾ long, terrestrial, common and widespread true bug. They are most often encountered in the fall, when they seek shelter for the winter.

The front (anterior) thoracic shield (pronotum) is covered with long, erect hairs.

The upper (dorsal) side of the abdomen is mostly hidden by the wings and is rarely visible except in flight. It is orangish-yellow with black markings, including two narrow, elongated, lance-shaped longitudinal marks in the center; and five broad, horizontal patches on each side.

There are two pairs of wings. They are held flat over the body when at rest. They are longer than the body but do not completely cover the sides of the body. The sides of the abdomen are exposed and appear conspicuously striped when the wings are closed. The forewings are longer than the hind wings. They have a thickened section at the base (hemelytra) and a thin membranous section at the tip with a clear dividing line between the two. The hemelytra is comprised of a triangular section (scutellum) at the base, a narrow area (clavus) behind the scutellum, and a broad marginal area (corium). There is a yellowish-white, horizontal, zig-zagged line on the corium that is narrow and confined to the veins. At the end of the corium there is a small but distinct triangular area (cuneus). The hindwings are thin and membranous.

The head is small, much narrower and somewhat shorter than the pronotum. At the front of the head there is a rounded lobe that projects forward. There is a pair of large compound eyes and a pair of small simple eyes (occelli). The mouth parts are optimized for piercing and sucking. They take the form of a long, 4-segmented beak that extends along the underside of the body between the legs. It consists of 4 hair-like blades (stylets) with sharp tips enclosed in a 4-segmented sheath. There are two channels in the beak, one spitting out saliva to keep the food flowing, and one for sucking in liquid food. The two lower jaw-like structures (maxillae) and two lower lips do not have feeler-like structures (palps) attached. The antennae are exposed, conspicuous, and long, much longer than the head. They have four segments. The first segment is chestnut orange with a black longitudinal stripe.

The third segment (femur) of the hind leg is is stout and spurred below. The fourth segment (tibia) is greatly dilated. The dilations are nearly equal in length and are less than 70% of the length of the tibia. They are lance-shaped and are not scalloped. The outer dilation is slightly wider than the inner. The feet (tarsi) have only 3 segments.

 
Similar
Species

 


Larval Food

Developing seeds and early flowers of host species

 
Adult Food

Sap from green cones and twigs of pine, hemlock, spruce, and fir.

 
Life Cycle

Adults emerge in late May or early June. The female lays rows of 1 16 long eggs on needles of host species. The eggs hatch in about 10 days. The young (nymphs) pass through 5 instar stages before becoming an adult. Adults overwinter.

 
Behavior

When in flight the wings create a loud buzz. Unlike similar-looking assassin bugs, they do not bite. When handled they squirt a foul-smelling chemical from glands on the sides of their bodies that is an effective deterrent. As the weather turns cold in the fall they often bask in the sun on the south side of human dwellings.


Distribution Distribution Map  

Sources: 7, 27, 29, 30.


Comments

 


Taxonomy

Order:

Hemiptera (true bugs, cicadas, hoppers, aphids and allies)

 

No Rank:

Euhemiptera

 

No Rank:

Neohemiptera

 

No Rank:

Prosorrhyncha

 

Suborder:

Heteroptera (true bugs)

 

No Rank:

Euheteroptera

 

No Rank:

Neoheteroptera

 

No Rank:

Panheteroptera

 

Infraorder:

Pentatomomorpha

 

Superfamily:

Coreoidea (leatherbugs)

 

Family:

Coreidae (leaf-footed bugs)

 

Subfamily:

Coreinae

 

Tribe:

Anisoscelini

 
Synonyms

Narnia anaticula

 
Common
Names

pine seed bug

western conifer seed bug

western conifer-seed bug

WCSB


 

 

 

 

 

 

 

Glossary

femur

On insects and arachnids, the third, largest, most robust segment of the leg, coming immediately before the tibia. On humans, the thigh bone.

 

instar

The developmental stage of arthropods between each molt; in insects, the developmental stage of the larvae or nymph.

 

ocellus

Simple eye; an eye with a single lens. Plural: ocelli.

 

pronotum

The saddle-shaped, exoskeletal plate on the upper side of the first segment of the thorax of an insect.

 

scutellum

The exoskeletal plate covering the rearward (posterior) part of the middle segment of the thorax in some insects. In Coleoptera, Hemiptera, and Homoptera, the dorsal, often triangular plate behind the pronotum and between the bases of the front wings. In Diptera, the exoskeletal plate between the abdomen and the thorax.

 

tarsus

The last two to five subdivisions of an insect’s leg, attached to the tibia; the foot. Plural: tarsi.

 

tibia

The fourth segment of an insect leg, after the femur and before the tarsus (foot).

 

 

 

 

 

       

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Nicky Clark


  western conifer seed bug    

Emily


  western conifer seed bug   western conifer seed bug
       
  western conifer seed bug    

       
       
       

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  Western Conifer Seed Bug
DianesDigitals
 
  Western Conifer Seed Bug  
 
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  Western Conifer Seed Bug
Andree Reno Sanborn
 
  Western Conifer Seed Bug  
 
About

Leptoglossus occidentalis

This bug used to be only in the west but now is common in the northeast US and Canada. Harmless to humans but it does make quite a stink if you pick it up or touch it!

bugguide.net/node/view/3393

has infrared receptors and is able to exploit the difference between cones and needles in the infrared spectrum, and zero in on cone-laden conifers from afar. This insect is a specialist herbivore that feeds on the contents of developing conifer seeds (from http://www.ubcbotanicalgarden.org/potd/2009/01/pinus_monticola_and_leptoglossus_occidentalis.php)

 
     
  Western Conifer Seed Bug (Leptoglossus occidentalis)
Bill Keim
 
  Western Conifer Seed Bug (Leptoglossus occidentalis)  
     
  Leptoglossus occidentalis (Western Conifer Seed Bug)
Allen Chartier
 
  Leptoglossus occidentalis (Western Conifer Seed Bug)  

 

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Other Videos

 
  Leptoglossus occidentalis
wetvideocamera
 
   
 
About

Published on Dec 30, 2014

Western Leaf-footed Bug found walking majestically in our office this December 30, 2014 , Burnaby, BC

 
     
  INSECTOS, Leptoglossus occidentalis en Móstoles
José Martín Roldán
 
   
 
About

Uploaded on Nov 8, 2010

El insecto Leptoglossus occidentalis, es un chinche de origen americano. Se ha localizado en Europa, primeramente en Italia en 1999 y en 2004 en Cataluña (España). Es un chinche (Heteroptera, Coreidae), de color marrón, que se diferencia de otros ibéricos rápidamente, por el ensanchamiento de las tibias en las patas posteriores. En los élitros con dibujo enladrillado, destaca en blanco la forma de una hache minúscula, invertida en el opuesto.
El insecto se encontraba en una crasulácea, en un jardín de Móstoles, donde abundan los pinos ya que precisamente se alimenta de las partes nuevas y blandas de dichos árboles.

Google Translate: The insect Leptoglossus occidentalis is a bug of American origin. It is located in Europe, primarily in Italy in 1999 and 2004 in Catalonia (Spain). It is a bug (Heteroptera, Coreidae), brown color, which differs from other Iberian quickly, widening the lukewarm on the hind legs. In the elytra with brickwork drawing highlights in the form of a white hache tiny, inverted on the opposite.
The insect was in a crasulácea, in a garden of Mostoles, pine trees abound precisely because it feeds on new and soft parts of these trees.

 
     
  Invasor Bug - Leptoglossus occidentalis (Heidemann, 1910) - Tiny Tenants
motionEmotion TV
 
   
 
About

Uploaded on Jan 11, 2012

www.carlosmezo.com

 
     
  leptoglossus occidentalis-cimice americana delle conifere
TheCrot2009 - Krotalo
 
   
 
About

Uploaded on Dec 5, 2011

Originaria degli Stati Uniti occidentali (California, Oregon e Nevada) ove trova il suo habitat naturale, le foreste di conifere, la specie è stata importata anche in Italia.
La cimice dei pini (Leptoglossus occidentalis Heidemann, 1910) è un insetto fitofago della famiglia dei Coreidi (Rhynchota Heteroptera).

Arriva in Italia probabilmente con l'importazione di legname. Nel 1999 è segnalato in Veneto. Quindi lo si trova anche in Lombardia, Friuli-Venezia Giulia, Trentino, Sicilia ed Emilia-Romagna. Nell'autunno 2006 è stato avvistato anche in Umbria. In Sardegna è ormai diffuso in tutta l'isola[1].
La sua presenza in ambienti meno ricchi di conifere non deve meravigliare in quanto l'insetto vive anche a spese del pistacchio.

Google Translate: Native to the western United States (California, Oregon and Nevada) where it finds its natural habitat, coniferous forests, the species was imported in Italy. The bug pines (Leptoglossus occidentalis Heidemann, 1910) is an insect pest of the family of Coreidi (Hemiptera Heteroptera).She arrives in Italy probably by importing timber. In 1999, it reported in Veneto. So it is also found in Lombardy, Friuli-Venezia Giulia, Trentino, Sicily and Emilia-Romagna. In autumn 2006 was spotted in Umbria. Sardinia is now widespread throughout the island. [1] Its presence in some less rich conifer is not surprising because the insect lives even at the expense of the pistachio.

http://it.wikipedia.org/wiki/Leptoglossus_occidentalis

 
     
  Western Conifer Seed Bug (Leptoglossus occidentalis)
Fyn Kynd
 
   
 
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Published on Jan 31, 2013

 
     

 

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Emily
10/28/2015

Location: Mound MN

western conifer seed bug


     
     
 

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