Pygarctia pterygostigma
Dyar, 1909
Pygarctia pterygostigma is a tiger moth in the Erebidae, first described by Harrison Gray Dyar Jr. in 1909. It occurs in the southwestern United States and Mexico, with a wingspan of approximately 28 mm. are active during summer months. As a member of the Pygarctia, it belongs to a group known for acoustic aposematism—emitting sound signals to warn bat of chemical defenses.
Pronunciation
How to pronounce Pygarctia pterygostigma: //paɪˈɡɑːrk.ti.ə ˌtɛr.ɪɡ.oʊˈstɪɡ.mə//
These audio files are automatically generated. While they are not always 100% accurate, they are a good starting point.
Identification
Distinguished from by geographic range (New Mexico, southern Texas, and Mexico) and the specific epithet referring to wing markings. Reliable identification to level requires examination of genitalia or reference to original description.
Appearance
Wingspan approximately 28 mm. Specific coloration and pattern details are not documented in available sources.
Habitat
Arid and semi-arid regions of the southwestern United States and northern Mexico. Specific microhabitat preferences are undocumented.
Distribution
Mexico; United States (New Mexico, southern Texas).
Seasonality
active June through September.
Behavior
As a tiger moth in the Pygarctia, acoustic aposematism has been demonstrated in congeneric . Whether P. pterygostigma specifically produces anti-bat acoustic signals has not been directly documented.
Ecological Role
are and likely participate in pollination. Larval is unknown. As a tiger moth, may serve as prey for bats and other .
Human Relevance
No documented economic or medical significance. Subject of basic taxonomic and ecological research.
Similar Taxa
- Pygarctia roseicapitis with overlapping geographic range and similar ; distinguished by differences in coloration and specific wing pattern elements.
- Other Pygarctia speciesRequire examination of genitalia or detailed wing pattern analysis for reliable separation; many have restricted distributions that aid identification.
More Details
Acoustic biology
Research on congeneric P. roseicapitis has demonstrated acoustic aposematism in natural , showing that some Pygarctia emit warning sounds to deter bat rather than relying solely on evasive maneuvers. The evolutionary origin of sound production in this appears to be warning signaling rather than sonar jamming.