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Digital Guide to Moth Identification

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

© Marius Aurelian - m.
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  • Pinned specimens of related species. (Hint: select View by Region on the related species page.)
Synonymy: Saturnia euryalus Boisduval, 1855
Platysamia? california Genzke, 1859
Platysamia californica Grote, 1865
Saturnia ceanothi Boisduval, 1869
Samia cedrosensis Cockerell, 1914
Samia parvimacula Grote, 1903
Samia rubra Neumögen & Dyar, 1894
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: Some specimens shown may not be sequenced. DNA barcode provides evidence of relatedness not proof of identification.
  • 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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