Entomologists Identify New Mining Bee Species With Exclusive Evolutionary Link to Native Texas Purple Sage

Scientists discover Andrena cenizophila, a new mining bee species that uniquely depends on the Texas cenizo shrub for its entire pollen supply.

By: AXL Media

Published: Mar 18, 2026, 7:37 AM EDT

Source: Information for this report was sourced from Washington State University

A Singular Dependence on the Texas Ranger Shrub

A newly identified species of solitary, ground-dwelling bee has revealed an unusually restrictive ecological niche within the American Southwest. Formally named Andrena cenizophila, or the "cenizo lover," this insect appears to be the only mining bee in the world that focuses exclusively on a single type of shrub for its nutritional needs. Silas Bossert, an assistant professor of entomology at Washington State University, confirmed that extensive field observations and DNA analysis showed the bee’s pollen samples consisted entirely of the purple sage, also known as the Texas Ranger.

Genetic Detective Work and Taxonomic Classification

While specimens of the bee were first collected decades ago by melittologist Jack Neff, it remained unclassified until modern genomic sequencing could be applied. By extracting DNA from female specimens and examining specific physical traits—including antennae shape and reproductive organs—the research team was able to place the bee on the evolutionary family tree. The results, published in the Journal of Melittology, indicate that Andrena cenizophila is most closely related to a species of mining bee found in central Mexico, despite its distinct regional specialization.

Navigating the Rapid Bloom Cycles of the Cenizo

The survival of this new species is inextricably linked to the volatile blooming patterns of the cenizo shrub, which produces mass floral displays for only about a week following significant rainfall. This tight window of opportunity is remarkably short for a pollinator, requiring the bee to collect all necessary food for its brood during these brief intervals. Bossert noted that this temporal constraint raises significant questions about the bee’s activity during the remainder of the year, as it must synchronize its entire life cycle with the unpredictable rains of the Texas and Coahuila deserts.