treehopper

(Cyrtolobus dixianus)

               
Conservation Status

IUCN Red List

not listed

treehopper (Cyrtolobus dixianus)

NatureServe

not listed

Minnesota

not listed

Occurrence

Uncommon

Flight/Season

April through July

Habitat/Hosts

Oak (Quercus spp.)

Size

Male: 316 (5 mm)

Female: ¼ (6 to 7 mm)

Photo by Alfredo Colon
 
Identification

Cyrtolobus dixianus is a relatively small leafhopper. It occurs in eastern and central United States and Canada. It is uncommon throughout its range, including in Minnesota. It feeds on oak and will come to light. Beyond that, nothing is known of this species life history or behavior.

Like all Cyrtolobus treehoppers, males and females have distinctly different forms. On the female, the head is slightly projected forward. The eyes are mostly yellow but reddish-brown in the center. The face between the eyes is only slightly wider than long. The edge of the cheek (gena) is strongly wavy.

The body is bright green, sometimes washed with bright yellow. When viewed from the front the upper part of the body (crest) is compressed, not rounded, and is strongly elevated.

The exoskeletal plate covering the thorax (pronotum) is bright green with many small white or pale green flecks. It is very long, extending back over the abdomen, and moderately arched, highest just before the middle. There is a large round depression (fovea) on the upperside, and the pronotum is slightly inflated before and after the fovea.

There are two pairs of wings, and they are held roof-like over the body when at rest. The forewings (hemelytra) are thickened, are longer than the body, and completely cover the sides of the body. The hemelytra are entirely clear and glassy or slightly tinged with yellow. They are comprised of a narrow area (clavus) behind the scutellum when the hemelytra are closed; and the remaining, broad, marginal area (corium). The veins are bright green and distinct. There is a horizontal vein crossing the corium that connects two longitudinal veins. The hindwings are thin, membranous, a little shorter than the hemelytra, and concealed beneath the hemelytra.

The legs are green. The claws are reddish.

The male is less arched. The back of the crest is white with a brown splotch toward the front, a broad brown band in the middle running from side to side, and a brown splotch at the tip.

 
Similar
Species

 

 
Larval Food

 

 
Adult Food

Oak (Quercus spp.)

 
Life Cycle

 

 
Behavior

Adults will readily come to light.

 
Distribution Distribution Map  

Sources: 24, 29, 30, 82.

 
Comments

No Common Name
None of the North American Cyrtolobus species have a common name. The common name for the family Membracidae is treehoppers, and is applied here for the sake of convenience.

 
Taxonomy

Order:

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

 

No Rank:

Euhemiptera

 

No Rank:

Clypeorrhyncha

 

Suborder:

Auchenorrhyncha (free-living hemipterans)

 

Infraorder:

Cicadomorpha

 

Superfamily:

Membracoidea

 

Family:

Membracidae (treehoppers)

 

Subfamily:

Smiliinae

 

Tribe:

Smiliini

 

Genus:

Cyrtolobus

 
Synonyms

 

 
Common
Names

no common name

 

 

 

 

 

Glossary

Corium

The thickened basal portion of the front wing that lies between the clavus and the membrane of insects in the family Hemiptera.

 

Gena

In insects, the area below the compound eye. In birds, the feathered side (outside) of the under mandible; the area between the the angle of the jaw and the bill.

 

Hemelytron

The forewing of true bugs (Order Hemiptera), thickened at the base and membranous at the tip. Plural: hemelytra.

 

Pronotum

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

 

 

 

 

 

       
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Alfredo Colon
       
  treehopper (Cyrtolobus dixianus)    
       
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Alfredo Colon
7/17/2018

Location: Woodbury, Minnesota

treehopper (Cyrtolobus dixianus)


     
     
 
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Created: 6/17/2020

Last Updated:

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