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Digital Guide to Moth Identification

Erebidae 930483 – 8334.1   Idia occidentalis (Smith, 1884)

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Taxonomic: Notes Idia occidentalis (Smith, 1884), formerly treated as a subspecies of 8334 Idia lubricalis (Geyer, 1832), is elevated to full species status in Mustelin (2006), Zootaxa, 1278: 5. Synonymy: occidentalis (Smith, 1884) (Helia) - MONA 1983: [NEW] partitalis (Smith, 1908) (Epizeuxis) Host Plants: Host familiy: Poaceae Fabaceae Lichens[none_specified] Detritophagous.  Host genera: Acmispon[=Lotus] Detritophagous Lichens.  Notes: detritophagous on lichens, grasses, rotting wood & other orgainic matter (Powell & Opler 2009).  (Shropshire & Tallamy 2025 [accessed 6xii2025]) Similar  : Species Pinned specimens of related species. (Hint: select View by Region on the related species page.)

References (Caution: DNA barcoding at BOLD provides evidence of relatedness, not proof of identification; some BOLD specimens shown may not be sequenced.)

Barcode of Life (BOLD) - Caution: Identifications often erroneous; DNA barcode provides evidence of relatedness, not proof of identification; many specimens not sequenced. Mustelin, T., 2006. Taxonomy of southern California Erebidae and Noctuidae (Lepidoptera) with descriptions of twenty one new species. Zootaxa, 1278: 1-47. (abstract and access (fee)) Powell, J. A. & P. A. Opler, 2009. Moths of Western North America, Pl. 42.33m; p. 254. Book Review and ordering Shropshire, K.J. & D.W. Tallamy, 2025. Lepidoptera of North America, north of Mexico: an annotated list containing geographic ranges and host-plant records. ZooKeys, 1261: 101-113; Suppl. 1. (PDF or read online) Species Page at BugGuide.Net Species Page at E. H. Strickland Museum Species Page at Pacific Northwest Moths Species Page at iNaturalist

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