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Digital Guide to Moth Identification

931821.1 – 10059.1   Sympistis tenuistriga (McDunnough, 1940)

David Reed
Distribution: CNC records from Canada: ON, MB, SK; USA: IL, MN - 11/21/2018
Similar Species:
  • Sympistis badistriga - white prothoracic collar compared to the almost black thorax; streakier wings; wider streaks from the wing base and in the cell from the orbicular spot to the subterminal area; whiter hind wings in both males and females - Don Lafontaine (pers. comm. 11/21/2018).
  • Sympistis tenuistriga - separated from badistriga by differences in the ♂ vesica (everted), ♀ bursa and DNA barcode - Don Lafontaine (pers. comm. 6/6/2017); paler brown prothoracic collar than the color of the thorax with some white tips to the scales in some and the thorax is mainly brown with black adjacent to the collar and on the sides. The forewing is a more even brown or gray with less streaking on the ground color and the black streaks are thinner - Don Lafontaine (pers. comm. 11/21/2018).
  • Sympistis fifia - overall more blotchy look with a mostly gray collar and thorax, gray wings, sometimes tinged with brown frequently with dark shading in the lower part of the medial area, which is more constricted than the other two species; fine black streaks in the subterminal; basal and subapical streaks are less sharply defined than the other species; the hind wing is darker sex for sex that either badistriga or tenuistriga - Don Lafontaine (pers. comm. 11/21/2018).
  • Sympistis rayata - records from Texas only; superficially identical to badistriga but speperable by DNA barcode - Don Lafontaine (pers. comm. 11/26/2018).
  • Pinned specimens of related species. (Hint: select View by Region on the related species page.)
Synonymy: Homohadena tenuistriga McDunnough, 1940
Taxonomic Notes: Sympistis tenuistriga (McDunnough, 1940), originally described as a variety of Sympistis badistriga, is treated as a valid species by Pohl et al. (2018) and Schmidt et al. (2018), ZooKeys, 788: 248.
  • Barcode of Life (BOLD) - Caution: DNA barcode provides evidence of relatedness, not proof of identification, and some BOLD specimens shown may not be sequenced.
  • Pohl, G.R., J-F. Landry, B.C. Schmidt, J.D. Lafontaine, J.T. Troubridge, A.D. Macaulay, E. van Nieukerken, J.R. deWaard, J.J. Dombroskie, J. Klymko, V. Nazari, K. Stead, 2018. Annotated checklist of the moths and butterflies (Lepidoptera) of Canada and Alaska. Pensoft, 1-580; PDF, Hardback.
  • Schmidt, B.C., J.D. Lafontaine & J.T. Troubridge, 2018. Additions and corrections to the check list of the Noctuoidea (Insecta, Lepidoptera) of North America north of Mexico IV. ZooKeys, 788: 241-252.
  • Species Page at BugGuide.Net
Sympistis tenuistriga
Carroll Rudy
Sympistis tenuistriga
David Reed
Sympistis tenuistriga
Carl Barrentine
Sympistis tenuistriga
33mm - LG – CNC - Christian Schmidt

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