Diplotaxis mentalis
Fall, 1909
Diplotaxis mentalis is a small scarab beetle described by Henry C. Fall in 1909. It belongs to the Melolonthinae and tribe Diplotaxini. The species occurs in arid and semi-arid regions of the southwestern United States and northern Mexico. Like other members of the Diplotaxis, are nocturnally active and frequently attracted to lights.
Pronunciation
How to pronounce Diplotaxis mentalis: //ˌdɪploʊˈtæksɪs mɛnˈteɪlɪs//
These audio files are automatically generated. While they are not always 100% accurate, they are a good starting point.
Identification
Separation from other Diplotaxis requires dissection and examination of male genitalia. Field identification to species level is generally not possible based on external alone. The Diplotaxis can be distinguished from similar small scarab genera by antennal club structure and overall body proportions, but species-level determination relies on microscopic characters.
Appearance
Small scarab beetle. As a member of Diplotaxini, likely has typical with oval, moderately convex body form. Specific diagnostic features for D. mentalis require examination of genitalia for definitive identification.
Habitat
Arid and semi-arid including sand dunes, desert grasslands, and scrublands. Associated with sandy soils characteristic of the Chihuahuan Desert and adjacent regions.
Distribution
Southwestern United States (Colorado, New Mexico, Texas) and northern Mexico (Chihuahua). Records from Middle America require verification.
Seasonality
have been observed in June and August, suggesting late spring through summer activity period. Peak activity likely coincides with summer monsoon rains.
Behavior
Nocturnally active. are attracted to artificial light sources, including blacklights and porch lights. Congregates on low vegetation to detect trails for mate location.
Ecological Role
likely serve as prey for attracted to lights. Larval stage (white ) presumably feeds on roots or decaying organic matter in sandy soils, contributing to soil turnover and nutrient cycling.
Human Relevance
Of minimal direct economic importance. Occasionally encountered by entomologists during collecting with lights. Not known as an agricultural pest.
Similar Taxa
- Other Diplotaxis speciesMorphologically similar small requiring genital dissection for separation; D. mentalis distinguished by specific male genitalic characters
- Small AphodiinaeSimilar size and habits, but differ in antennal club structure and tarsal
More Details
Taxonomic Note
The epithet 'mentalis' refers to the chin or mind, but Fall did not explicitly state the etymology in the original description. The name may allude to a distinctive feature of the or simply be a fanciful designation.
Collection Method
Best collected using ultraviolet blacklights or mercury vapor lights at night in appropriate sandy during summer months. Daytime beating of low vegetation may occasionally yield .