Anisota stigma

Fabricius, 1775

Spiny Oakworm Moth

Anisota is a commonly known as the spiny moth. The occurs across eastern and central North America, with males uniquely attracted to light among Anisota species. Its feed primarily on oak foliage. The moth was first described by Johan Christian Fabricius in 1775.

Anisota stigma by (c) John P Friel, some rights reserved (CC BY), uploaded by John P Friel. Used under a CC-BY license.Anisota stigma by J.D. Roberts. Used under a CC BY-SA 2.5 license.Monograph of the bombycine moths of North America, including their transformations and origin of the larval markings and armature (1914) (14775875094) by Packard, A. S. (Alpheus Spring), 1839-1905; Cockerell, Theodore D. A. (Theodore Dru Alison), 1866-1948. Used under a No restrictions license.

Pronunciation

How to pronounce Anisota stigma: /ˌænɪˈsoʊtə ˈstɪɡmə/

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Identification

Distinguished from by its relatively small size (wingspan ~45 mm versus larger in A. senatoria and A. virginiensis). Males are the only Anisota known to be attracted to light. have spiny projections not present in all related species.

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Appearance

have a wingspan of approximately 45 mm. The is smaller than related Anisota species. possess spiny projections, characteristic of the .

Distribution

North America from Massachusetts and southern Ontario south to Florida, west to Minnesota, Kansas, and Texas.

Diet

feed primarily on oak (Quercus). Has been reported on hazel (Corylus) and basswood (Tilia).

Behavior

Males are attracted to light, a trait unique within the Anisota.

Ecological Role

Larval on oak trees. Specific ecological interactions beyond have not been documented.

Human Relevance

Occasional defoliator of oak trees. May contribute to localized oak events, though typically not a significant pest.

Similar Taxa

  • Anisota senatoriaLarger wingspan, orangestriped pattern on , males not attracted to light
  • Anisota virginiensisLarger size, different larval coloration, males not attracted to light

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