Trimerotropis cyaneipennis

Bruner, 1889

blue-winged grasshopper, blue crackler

Trimerotropis cyaneipennis is a -winged in the , commonly known as the -winged grasshopper or blue crackler. It is to western North America, with a distribution spanning from West Texas through New Mexico, Arizona, Colorado, Utah, and Nevada to southern Oregon and southern California. The is known to hybridize naturally with T. suffusa in zones of microsympatry, where their distributions and overlap.

Trimerotropis cyaneipennis by Even Dankowicz. Used under a CC BY 4.0 license.

Pronunciation

How to pronounce Trimerotropis cyaneipennis: /ˌtraɪməˈrɒtrəpɪs saɪəˈniːpɛnɪs/

These audio files are automatically generated. While they are not always 100% accurate, they are a good starting point.

Identification

As a member of the Oedipodinae (-winged ), T. cyaneipennis likely exhibits the characteristic enlarged hind and banded typical of the . The specific epithet 'cyaneipennis' (-winged) suggests distinctive blue coloration on the wings. Precise identification features distinguishing it from congeneric such as T. suffusa, T. pallidipennis, or T. fontana are not documented in available sources.

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Habitat

Occurs primarily in desert regions and areas with sparse vegetation. In the Pueblo Mountains of southeast Oregon, it has been found in microsympatry with T. suffusa in a narrow , suggesting occupancy of transitional zones between desert and woodland .

Distribution

Western North America: from West Texas through New Mexico, Arizona, Colorado, Utah, and Nevada to southern Oregon and southern California. GBIF records confirm presence in Arizona and Utah. The is predicted to occur in southwestern Wyoming but has not been documented there in systematic surveys.

Behavior

Produces (audible by -flicking), a characteristic of -winged . The ' crackler' likely derives from this sound production.

Similar Taxa

Trimerotropis suffusaOverlapping distribution in southern Oregon; ecologically isolated by preference (T. suffusa in woodlands vs. T. cyaneipennis in desert/sparse vegetation), but hybridizes in narrow ; distinguished by number and of hybrid offspring
Trimerotropis pallidipennisCongeneric -winged with potentially overlapping range in western North America; specific distinguishing features not documented in available sources
Trimerotropis fontanaCongeneric with western distribution; may occur in similar ; differentiation requires detailed morphological examination

More Details

Hybridization and Chromosomal Biology

Natural F1 hybrids between T. cyaneipennis and T. suffusa have been documented in the Pueblo Mountains of southeast Oregon. These hybrids are intermediate in , , and number. The parental differ by a fixed centric fusion, with meiotic analysis revealing irregular segregation and pairing failures that produce mostly or aneuploid sperm, indicating substantial postzygotic isolation despite hybrid formation.

Survey Detection Limitations

As a -winged with active characteristics, T. cyaneipennis may be underrepresented in standard sweep- surveys. The Wyoming Distribution Atlas (1988-2019) lists it as 'probably occurring' in southwestern Wyoming based on predicted distribution, but it was not collected during systematic surveys, likely due to a combination of geographic survey toward eastern Wyoming and the ' behavioral avoidance of sweep-net sampling.