Apantesis nevadensis
(Grote & Robinson, 1866)
Nevada tiger moth
Apantesis nevadensis, the Nevada , is a small tiger moth in the Erebidae. It was described by Grote and Robinson in 1866. The occurs across western North America from the Pacific Northwest through the Rocky Mountain states and intermountain region, extending into the Canadian prairies. It inhabits arid and semi-arid environments including deserts, sagebrush rangelands, juniper woodlands, and open forests. The species was transferred from the Grammia to Apantesis in 2009 along with related tiger moth genera.
Pronunciation
How to pronounce Apantesis nevadensis: /əˈpæntəsɪs ˌnɛvəˈdɛnsɪs/
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Identification
Small to -sized with length 15–18 mm. Distinguished from similar Apantesis by geographic range and preferences in arid western regions. Forewing pattern of dark and light or spots; with bright aposematic coloration. Genitalic dissection or may be required for definitive identification from closely related Apantesis species.
Appearance
length 15–18 mm. Pattern and coloration typical of Apantesis , with banded or spotted forewings. usually display bright warning coloration characteristic of tiger moths, often with red, orange, or contrasting with dark markings. Body moderately with moderately dense scaling.
Habitat
Deserts, juniper woodlands, open sagebrush rangelands, and open forests in arid to semi-arid regions.
Distribution
Pacific Northwest of North America; intermountain region; Rocky Mountain states of USA. In Canada: Alberta, southern Saskatchewan, and Manitoba.
Diet
feed on herbaceous plants including Lupinus and Viola beckwithii.
Host Associations
- Lupinus - larval various
- Viola beckwithii - larval
Ecological Role
Larval ; likely serves as for and contributes to . As a , may possess defensive chemical compounds acquired from plants or synthesized de novo.
Human Relevance
No significant economic or agricultural impact documented. Subject of general entomological interest and citizen science observation.
Similar Taxa
- Apantesis phalerataSimilar size and pattern; may overlap in range; requires detailed examination for separation
- Grammia speciesFormerly classified in same ; similar and biology; distinguished by revised generic placement based on phylogenetic studies
More Details
Taxonomic history
Transferred from Grammia to Apantesis in 2009 based on molecular phylogenetic studies by Schmidt et al., along with from genera Holarctia and Notarctia. This reclassification reflects modern understanding of evolutionary relationships.
Subspecies
Five recognized: A. n. nevadensis (Rocky Mountains to Pacific), A. n. geneura (Stretch, 1878), A. n. gibsoni (McDunnough, 1937), A. n. superba (Stretch, 1873) from British Columbia and Washington Cascades, and A. n. vivida B.C. Schmidt, 2009 from Alberta and Peace River.