simple wave

(Scopula junctaria)

               
Hodges #

7164

simple wave

 

Conservation Status

IUCN Red List

not listed

NatureServe

NNR - Unranked

Minnesota

not listed

Occurrence

 

Flight/Season

One generation per year: Late May to August

Habitat

 

Size

Wingspan: ¾ to 1 (20 to 26 mm)

         
         
          Photo by Lynn Rubey
 
Identification

With about 500 described species worldwide, Scopula is the largest genus in the subfamily Sterrhinae (waves and mochas). At least 30 occur in North America north of Mexico. The genus also contains some of the largest and most common species Sterrhinae in North America.

Simple wave is a small geometer moth. It occurs across the United States, Canada, and Mexico.

Adults have a wingspan of ¾ to 1 (20 to 26 mm). They are variable in both the shape of the forewings and its overall color. The forewings may be sharply angled or rounded at the tip. The overall color may be white or dingy yellowish (cream-colored). All individuals have a dusting of dark scales on the forewings and hindwings. There are at least three dark, thin, wavy lines: the antemedial line (AM line), between the basal and median areas; the median line, which passes through the median area; and the postmedial line (PM line), that separates the median area from the postmedial area. On cream-colored individuals, there is also visible an adterminal line, just before the terminal area; and a subterminal line (ST line), between the PM line and the adterminal line. Lines on cream-colored individuals are brownish-yellow and easily discernible. Lines on white individuals are faint. The AM, median, and PM lines are sightly sinuous, are complete from the inner to the forward (costal) margins, and curve up approaching the costal margin. On white individuals the ST and adterminal lines are present but may be difficult to see. There is usually no discal spot. The hindwing is similar but there is no AM line.

 
Similar
Species

 

 
Larval Food

Leaves of forbs and deciduous trees and shrubs, including chickweed, elm, and clover

 
Adult Food

 

 
Life Cycle

 

 
Behavior

The wings are spread out and appressed to the leaf or other substrate when at rest. In this position, the leading edges of the wings (costas) form a nearly straight line.

 
Distribution Distribution Map  

Sources: 21, 24, 29, 30, 71, 72, 75.

 
Comments

 

 
Taxonomy

Order:

Lepidoptera (butterflies and moths)

 

Suborder:

Glossata

 

Infraorder:

Neolepidoptera

 

Parvorder:

Heteroneura

 

No Rank:

Ditrysia

 

No Rank:

Obtectomera

 

Superfamily:

Geometroidea (inchworm moths)

 

Family:

Geometridae (geometer moths)

 

Subfamily:

Sterrhinae (waves and mochas)

 

Tribe:

Scopulini

 
Subordinate Taxa

simple wave (Scopula junctaria johnstonaria)

simple wave (Scopula junctaria junctaria)

simple wave (Scopula junctaria quinquelinearia)

 
Synonyms

 

 
Common
Names

simple wave

simple wave moth

 

 

 

 

 

 

 

Glossary

Antemedial line

A thin line separating the basal area and the median area of the forewing of Lepidoptera.

 

Costal margin

The leading edge of the forewing of insects.

 

 

 

 

 

       
Visitor Photos
   
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Lynn Rubey
       

A Simple Wave Moth in The Big Stone National Wildlife Refuge.

  simple wave    
       
MinnesotaSeasons.com Photos
       
       

 

Camera

     
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Camcorder

         
Visitor Sightings
   
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Lynn Rubey
8/13/2019

Location: Big Stone National Wildlife Refuge

A Simple Wave Moth in The Big Stone National Wildlife Refuge.

simple wave


     
     
 
MinnesotaSeasons.com Sightings
         

 

 

 

Binoculars


Created: 8/27/2019

Last Updated:

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