Ethmia mirusella

(Chambers, 1874)

Ethmia mirusella is a small in the Ethmiidae (formerly placed in Depressariidae). It occurs in the south-central United States, with active in spring and late summer through early autumn. The exhibits with two per year. Larvae feed on Lithospermum species in the Boraginaceae family.

Pronunciation

How to pronounce Ethmia mirusella: /ˈɛθ.mi.ə mɪˈruː.sɛl.lə/

These audio files are automatically generated. While they are not always 100% accurate, they are a good starting point.

Identification

Distinguished from other Ethmia by the specific wing pattern: forewings with white ground color and longitudinal straight line dividing the pattern, with dark brown costad area in the . The combination of white hindwings with occasional faint grayish-brown tinge and the particular forewing markings separate it from in the same geographic region.

Appearance

Small with forewings 7.8–9.2 mm in length. Forewings white with pattern divided by a longitudinal straight line; costal area dark brown shading to pale brownish and whitish toward , with costa brown only at base; costal area beyond mostly white. Hindwings white, sometimes very lightly tinged with grayish brown toward margins.

Distribution

United States, from Kansas and Oklahoma southward to central and western Texas.

Seasonality

active in March and from May to September; with two per year.

Diet

Larvae feed on Lithospermum (Boraginaceae). diet not documented.

Host Associations

Lithospermum - larval food plant in Boraginaceae

Life Cycle

; two per year with periods in March and May–September. Complete with , larval, pupal, and adult stages. Larval stage feeds on plants; specific details of and stage not documented.

Behavior

attracted to light. activity pattern inferred from light-trapping records.

Similar Taxa

Ethmia discostrigellaSimilar size and coloration, but E. mirusella distinguished by specific forewing pattern with longitudinal straight line dividing costad dark brown area
Other Ethmia speciesMany Ethmia share black-and-white or gray coloration and small size; precise wing pattern details and geographic distribution required for identification

More Details

Taxonomic history

Originally described as Anesychia mirusella by Chambers in 1874. Formerly placed in Depressariidae, now classified in Ethmiidae based on molecular and morphological studies. The Ethmia contains approximately 50 in North America north of Mexico, with highest diversity in the southwestern United States.

Observation data

196 observations recorded on iNaturalist as of source date, indicating the is moderately well-documented by citizen scientists within its range.