toothed somberwing

(Euclidia cuspidea)

               
Hodges #

8731

toothed somberwing
Conservation Status

IUCN Red List

not yet assessed

NatureServe

NNR - Unranked

Minnesota

not listed

Occurrence

Common and widespread

Flight/Season

Probably one generation in Minnesota: Mid-May to early July

Habitat

Meadows, woodland edges and openings, with long grass

 
Size

Wingspan: 1 to 17 16

Total Length: about

 

Identification

This is a stout, medium-sized moth. The adult is about long and has a wingspan of 1 to 17 16.

The forewing is mottled dark brown and purplish-gray with dark, blackish-brown markings. The markings include an antemedian band with a prominent triangular tooth on the lower (proximal) side; an inconspicuous, zig-zag, postmedian line; a prominent triangle below (distal to) the reniform spot; and a subapical spot at the margin that connects to a small triangle. Some individuals have a broad pale submarginal band. Two blackish-brown spots surrounded by gray in the basal area near the inner margin lend to the appearance of a face.

The hindwing is dark brown from the base to the median area. It is yellowish-brown from the median area to the margin except for a dark submarginal line. The hindwings and forewings are held in contact by bristles (a frenulum) and scales (a retinaculum).

The antennae are slender and threadlike, not feathered.

The caterpillar is slender, brown and finely striped. A thin brown spiracular stripe is bordered on each side by a thin pale stripe. There are no leg-like structures (prolegs) on abdominal segment 3 but there are reduced prolegs on segment 4.

 
Similar
Species

 


Larval Food

Clover, lupine, sweetfern, and grasses

 
Adult Food

 

 
Life Cycle

Pupa overwinter

 
Behavior

It is active both day and night. When flushed from vegetation it flies rapidly for about 20 yards then drops to the ground. It rests with the wings held flat and the hindwings usually concealed. It is attracted to light.


Distribution Distribution Map  

Sources: 7, 21, 29, 75.


Comments

 


Taxonomy

Order:

Lepidoptera (butterflies and moths)

 

Suborder:

Glossata

 

Infraorder:

Neolepidoptera

 

Parvorder:

Heteroneura

 

No Rank:

Ditrysia

 

No Rank:

Obtectomera

 

Superfamily:

Noctuoidea (noctuid moths)

 

Family:

Erebidae

 

Subfamily:

Erebinae

 

Tribe:

Euclidiini

 
Synonyms

 

 
Common
Names

toothed somberwing

toothed somberwing moth


 

 

 

 

 

 

Glossary

frenulum

A spine (male) or multiple spines (female) at the base of the costal edge of the hindwing of many moths that couples with the retinaculum on the forewing to keep the wings in contact which each other.

 

reniform spot

A kidney-shaped spot or outline in the outer median area near the costal margin on the forewing of many moths of the Noctuidae family.

 

 

 

 

 

       

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