Ethmiinae

Ethmiinae moths are small to moderate in size. Species-level identification relies heavily on examination of male and female genitalia morphology, which has been illustrated and used for species delimitation in taxonomic treatments. DNA barcoding has proven effective for distinguishing species, including resolution of cryptic species complexes that were previously unrecognized based on morphology alone.

In Costa Rica, species have been documented in both rain forest and dry forest habitats. The Área de Conservación Guanacaste in northwestern Costa Rica has been a focal site for intensive inventory, yielding records of 42 species. Habitat information for the subfamily outside the Neotropics is less documented.

Worldwide distribution. Neotropical records span from Argentina north to the southwestern United States (Arizona) and from Florida to Texas, plus the Caribbean. The Costa Rican fauna is particularly well-documented with 45 species recorded, 22 of which were described as new in a 2014 synopsis. European records include the Baltic countries, British Isles, and Fennoscandia for at least some species.

Larvae feed on plants in the families Boraginaceae and Gesneriaceae. Boraginaceae represents the most frequently used food plant family worldwide for the subfamily, while Gesneriaceae was documented as a new food plant family record in Costa Rica. Specific host plants include species of Bourreria, Cordia, Varronia (Boraginaceae), and Drymonia (Gesneriaceae).

• Boraginaceae - larval food plantmost frequently used food plant family worldwide
• Gesneriaceae - larval food plantnew food plant family record discovered in Costa Rica

Larvae of at least 11 species have been described and illustrated, with rearing protocols established for inventory work. Rearing from field-collected larvae on food plants has been successful for 18 species. Last instar caterpillars have been characterized for documented species.

Adults are attracted to light and have been collected using light-trapping methods. Prior to the implementation of DNA barcoding in 2004, routine light-trapping specimens were sometimes overlooked due to assumptions that they represented common, widespread species.

Caterpillars serve as hosts for parasitoids, including species of Apanteles, forming part of local food web interactions. The subfamily has been a significant component of Lepidoptera inventory efforts in the Área de Conservación Guanacaste, contributing to documentation of tropical biodiversity.

• ElachistidaeEthmiinae was treated as a subfamily of Elachistidae in literature between 1999 and 2013 before molecular and morphological analyses supported placement in Depressariidae
• OecophoridaeEthmiinae has also been included in Oecophoridae in some classifications, reflecting historical taxonomic uncertainty

• BugGuide
• GBIF taxonomy match
• iNaturalist taxon
• NCBI Taxonomy
• A Gathering of Lepidopterists: Who's Who of the Butterfly, Moth Experts | Bug Squad
• What's in a Name? Leslie Saul-Gershenz and Norm Gershenz | Bug Squad
• Gelechioidea: Elachistidae: Ethmiinae; Gelechiidae: Anomologinae, Dichomeridinae, Gelechiinae, undetermined subfamily; Oecophoridae: undetermined subfamily; Scythrididae: undetermined subfamily; undetermined family
• Biology and distribution of the declining moth Ethmia pyrausta (Pallas, 1771), with description of the larva (Gelechioidea, Depressariidae, Ethmiinae)
• A synopsis of the genus Ethmia Hübner in Costa Rica: biology, distribution, and description of 22 new species (Lepidoptera, Gelechioidea, Depressariidae, Ethmiinae), with emphasis on the 42 species known from Área de Conservación Guanacaste
• Figure 4 from: Nupponen K, Ahola M, Nieminen M, Juerivete U (2015) Biology and distribution of the declining moth Ethmia pyrausta (Pallas, 1771), with description of the larva (Gelechioidea, Depressariidae, Ethmiinae). Nota Lepidopterologica 38(1): 47-58. https://doi.org/10.3897/nl.38.9034
• Figure 2 from: Nupponen K, Ahola M, Nieminen M, Juerivete U (2015) Biology and distribution of the declining moth Ethmia pyrausta (Pallas, 1771), with description of the larva (Gelechioidea, Depressariidae, Ethmiinae). Nota Lepidopterologica 38(1): 47-58. https://doi.org/10.3897/nl.38.9034
• Figure 10 from: Nupponen K, Ahola M, Nieminen M, Juerivete U (2015) Biology and distribution of the declining moth Ethmia pyrausta (Pallas, 1771), with description of the larva (Gelechioidea, Depressariidae, Ethmiinae). Nota Lepidopterologica 38(1): 47-58. https://doi.org/10.3897/nl.38.9034
• Figure 3 from: Nupponen K, Ahola M, Nieminen M, Juerivete U (2015) Biology and distribution of the declining moth Ethmia pyrausta (Pallas, 1771), with description of the larva (Gelechioidea, Depressariidae, Ethmiinae). Nota Lepidopterologica 38(1): 47-58. https://doi.org/10.3897/nl.38.9034
• Figure 5–8 from: Nupponen K, Ahola M, Nieminen M, Juerivete U (2015) Biology and distribution of the declining moth Ethmia pyrausta (Pallas, 1771), with description of the larva (Gelechioidea, Depressariidae, Ethmiinae). Nota Lepidopterologica 38(1): 47-58. https://doi.org/10.3897/nl.38.9034
• Figure 1 from: Nupponen K, Ahola M, Nieminen M, Juerivete U (2015) Biology and distribution of the declining moth Ethmia pyrausta (Pallas, 1771), with description of the larva (Gelechioidea, Depressariidae, Ethmiinae). Nota Lepidopterologica 38(1): 47-58. https://doi.org/10.3897/nl.38.9034
• Figure 9 from: Nupponen K, Ahola M, Nieminen M, Juerivete U (2015) Biology and distribution of the declining moth Ethmia pyrausta (Pallas, 1771), with description of the larva (Gelechioidea, Depressariidae, Ethmiinae). Nota Lepidopterologica 38(1): 47-58. https://doi.org/10.3897/nl.38.9034
• Supplementary material 3 from: Phillips-Rodríguez E, Powell J, Hallwachs W, Janzen D (2014) A synopsis of the genus Ethmia Hübner in Costa Rica: biology, distribution, and description of 22 new species (Lepidoptera, Gelechioidea, Depressariidae, Ethmiinae), with emphasis on the 42 species known from Área de Conservación Guanacaste. ZooKeys 461: 1-86. https://doi.org/10.3897/zookeys.461.8377
• Supplementary material 2 from: Phillips-Rodríguez E, Powell J, Hallwachs W, Janzen D (2014) A synopsis of the genus Ethmia Hübner in Costa Rica: biology, distribution, and description of 22 new species (Lepidoptera, Gelechioidea, Depressariidae, Ethmiinae), with emphasis on the 42 species known from Área de Conservación Guanacaste. ZooKeys 461: 1-86. https://doi.org/10.3897/zookeys.461.8377
• Figures 81–85 from: Phillips-Rodríguez E, Powell J, Hallwachs W, Janzen D (2014) A synopsis of the genus Ethmia Hübner in Costa Rica: biology, distribution, and description of 22 new species (Lepidoptera, Gelechioidea, Depressariidae, Ethmiinae), with emphasis on the 42 species known from Área de Conservación Guanacaste. ZooKeys 461: 1-86. https://doi.org/10.3897/zookeys.461.8377
• Supplementary material 1 from: Phillips-Rodríguez E, Powell J, Hallwachs W, Janzen D (2014) A synopsis of the genus Ethmia Hübner in Costa Rica: biology, distribution, and description of 22 new species (Lepidoptera, Gelechioidea, Depressariidae, Ethmiinae), with emphasis on the 42 species known from Área de Conservación Guanacaste. ZooKeys 461: 1-86. https://doi.org/10.3897/zookeys.461.8377
• Figures 70–74 from: Phillips-Rodríguez E, Powell J, Hallwachs W, Janzen D (2014) A synopsis of the genus Ethmia Hübner in Costa Rica: biology, distribution, and description of 22 new species (Lepidoptera, Gelechioidea, Depressariidae, Ethmiinae), with emphasis on the 42 species known from Área de Conservación Guanacaste. ZooKeys 461: 1-86. https://doi.org/10.3897/zookeys.461.8377