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Digital Guide to Moth Identification

Geometridae
91a1416 – 6954   Tetracis jubararia Hulst, 1886
             October Thorn Moth

© Phil Huntley-Franck
Distribution: British Columbia to southern California, eastward to central Saskatchewan, southwestern Idaho and western Nevada, from ~ 500-7,400 ft. elev..
Seasonality
and Size:
Mid-August - late November. FWL ~ 17-26 mm.
Larva and
Host Plants:
Many known host plants include Alnus, Betula, Cornus, Populus, Ribes, Alder, Picea.
Genitalia: See Ferris & Schmidt (2010).
Similar Species:
  • Separate from T. mosesiana in California coastal counties by genitalia and DNA. Elsewhere the absence of pale shading beyond the pm. line distinguishes this species from T. pallulata.
  • Pinned specimens of related species. (Hint: select View by Region on the related species page.)
Synonymy:
  • jubararia Hulst, 1886 (Tetracis) - MONA 1983: 6954
  • ssp. a. jubararia Hulst, 1886 (Tetracis) - MONA 1983: 6954
  • ssp. b. sericeata (Barnes & McDunnough, 1917) (Synaxis)
  • Taxonomic Notes: Tetracis jubararia Hulst, 1886, n. comb. in Ferris & Schmidt (2010), was formerly in the genus Synaxis.
    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.
    • Ferris, C.D. & B.C. Schmidt, 2010. Revision of the North American Genera Tetracis Guenée and Synonymization of Synaxis Hulst with Descriptions of Three New Species (Lepidoptera: Geometridae: Ennominae). Zootaxa, 2347: 1-36.
    • Powell, J. A. & P. A. Opler, 2009. Moths of Western North America, Pl. 30.30f; p. 219. Book Review and ordering
    • Species Page at BugGuide.Net
    • Species Page at E. H. Strickland Museum
    Tetracis jubararia
    © Dick Wilson
    Tetracis jubararia
    © John Davis
    Tetracis jubararia
    © Dick Wilson - DNA
    Tetracis jubararia
    © Jim Moore
    Tetracis jubararia
    – © Cliff Ferris
    Tetracis jubararia
    – © Cliff Ferris
    Tetracis jubararia
    – © Cliff Ferris
    Tetracis jubararia
    © Gary Anweiler
    Tetracis jubararia
    LG – © Jim Troubridge
    Tetracis jubararia
    LG – © Jim Troubridge
    Tetracis jubararia
    40mm – © Jim Vargo

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