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Digital Guide to Moth Identification

Saturniidae
890085 – 7770   Hyalophora euryalus (Boisduval, 1855)
             Ceanothus Silkmoth

© Marius Aurelian - m.
Similar Species:
  • Pinned specimens of related species. (Hint: select View by Region on the related species page.)
Synonymy:
  • euryalus (Boisduval, 1855) (Saturnia) - MONA 1983: 7770
  • california (Genzke, 1859) (Platysamia)
  • californica (Grote, 1865) (Platysamia)
  • ceanothi (Boisduval, 1869) (Saturnia)
  • cedrosensis (Cockerell, 1914) (Samia)
  • parvimacula (Grote, 1903) (Samia)
  • rubra (Neumoegen & Dyar, 1894) (Samia)
  • Taxonomic Notes: Hyalophora euryalus (Boisduval, 1855) formerly included as a synonym Hyalophora kasloensis (Cockerell, in: Packard, 1914) which was raised to full species in Kitching & Rougerie et al. (2018). The names parvimacula (Grote, 1903) and rubra (Neumögen & Dyar, 1894) were inadvertently listed as synonyms below kasloensis instead of euryalus in Pohl & Nanz (eds.) (2023) (Ryan St Laurent, pers. comm., 28 December 2023) and are here corrected as synonyms of the latter.
    References
    • Barcode of Life (BOLD) - Caution: DNA barcode provides evidence of relatedness, not proof of identification, and some BOLD specimens shown may not be sequenced.
    • Boisduval, J.B., 1875. Bulletin de la Société Entomologique de France, 3: 32.
    • Collins, M.M., 2018. Translations of two original descriptions of Hyalophora euryalus Bdv. (Saturniidae) and the legacy of errors behind the common misspelling of the species name. News of The Lepidopterists’ Society, 60(1): 42-43.
    • Ferguson, D. C., 1972. Moths of America North of Mexico, Fascicle 20.2b: p. 261; pl. 19.7-8, 20.1-2. order or free PDF
    • Grote, A.R., 1883. Note on North American Attaci. The Canadian Entomologist, 35(3): 109-110.
    • Grote, A.R., 1883. Note on North American Attaci. The Canadian Entomologist, 35(3): 109.
    • Grote, A.R., 1902. Auszug aus dem Sitzungsbericht des Vereins für Sclimetterlingsfreunde zu Hildesheim . Insekten-Börse, 19: 252-253.
    • McDunnough, J.H., 1921. Samia euryalus Bvd., the correct name for the Californian silk worm moth. The Canadian Entomologist, 53(8): 191-192.
    • Neumoegen, B. & H.G. Dyar, 1894. A preliminary revision of the Bombyces of America north of Mexico. Journal of the New York Entomological Society , 2: 124. (rubra)
    • Pohl, G. R. and S. R. Nanz (eds.), 2023. Annotated Taxonomic Checklist of the Lepidoptera of North America, North of Mexico. Wedge Entomological Research Foundation, Bakersfield, California, xiv + 580 pp. (order).
    • Powell, J. A. & P. A. Opler, 2009. Moths of Western North America, Pl. 38.7m; p. 241. Book Review and ordering
    • Species Page at BugGuide.Net
    • Species Page at E. H. Strickland Museum
    • Species Page at Pacific Northwest Moths
    • Tuskes, P.M., J.P. Tuttle, M.M. Collins, 1996. The wild silk moths of North America: a natural history of the Saturniidae of the United States and Canada. Cornell University Press, Ithaca, NY & London, UK, available in Books to Borrow at Internet Archive.
    Hyalophora euryalus
    © Ronald Hanson
    Hyalophora euryalus
    © John Davis
    Hyalophora euryalus
    © John Davis
    Hyalophora euryalus
    © Peter J. Bryant
    Hyalophora euryalus
    - 110mm – © Jim Vargo
    Hyalophora euryalus
    110mm – © Jim Vargo
    Hyalophora euryalus
    © Peter J. Bryant
    4th instar
    Hyalophora euryalus
    © Canadian National Collection LG

    Hyalophora euryalus
    © Peter J. Bryant
    3rd instar
    Hyalophora euryalus
    © Peter J. Bryant

    Hyalophora euryalus
    © Peter J. Bryant

    Hyalophora euryalus
    © Peter J. Bryant

    Hyalophora euryalus
    © Peter J. Bryant
    1st instar
    Hyalophora euryalus
    © Peter J. Bryant
    2nd instar
    Hyalophora euryalus
    © Peter J. Bryant
    5th instar

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