Ethmia tricula

Powell, 1973

Ethmia tricula is a small in the Ethmiidae (Depressariidae in some classifications), described by Powell in 1973. It is to California, United States. At approximately 4.3 mm forewing length, it is the smallest member of the Ethmia in the New World. The species is characterized by uniformly dull gray-brown wings with matching fringes.

Pronunciation

How to pronounce Ethmia tricula: /ˈɛθ.mi.a ˈtɹɪk.jʊ.la/

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Identification

Distinguished from other Ethmia by its extremely small size (4.3 mm forewing length, smallest New World Ethmia) and uniformly dull gray-brown coloration without contrasting markings. Most Ethmia species exhibit black, white, and gray patterned wings; the absence of such patterning in E. tricula is notable. Similar small size may occur in some other microlepidoptera, but the combination of size and uniform coloration within Ethmia is diagnostic.

Appearance

Small with forewing length of approximately 4.3 mm. Ground color of forewings and hindwings is uniform dull gray-brown, including the fringes. No distinctive pattern elements described in available sources.

Distribution

to California, United States. Specific locality details beyond state level are not documented in available sources.

More Details

Taxonomic Note

placement has varied; some sources list Ethmiidae while others place the in Depressariidae. The Catalogue of Life recognizes Ethmiidae as the valid family.

Size Distinction

The ' status as the smallest New World Ethmia is explicitly noted in the original description, making size a key diagnostic feature for this geographically restricted species.