Acmaeodera starrae
Knull, 1966
Acmaeodera starrae is a of metallic wood-boring in the , described by Knull in 1966. The species is found in North America, with documented occurrences in Texas and New Mexico. Based on field observations, are known to visit flowers of Echinocereus enneacanthus carnosus ( cactus) and other low-growing desert plants. The species is considered rare and is infrequently encountered by .
Pronunciation
How to pronounce Acmaeodera starrae: /ˌækmiːoʊˈdɛrə ˈstɛəreɪ/
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Identification
Acmaeodera starrae is a small within the Acmaeodera. Field observations indicate it is similar in size to A. riograndei and A. robigo, with which it has been collected sympatrically on cactus flowers. Distinguishing features from these similar species require close examination; A. starrae appears to have more uniform elytral markings compared to the broken or irregular vittae seen in some related species. Positive identification typically requires reference to original description or comparison with authenticated specimens.
Habitat
Documented from juniper chaparral and adjacent desert in western Texas. have been observed in areas with Echinocereus enneacanthus carnosus ( cactus) growing on steep canyon slopes and canyon walls. The habitat is characterized by dry conditions, sparse vegetation, and rocky terrain.
Distribution
Known from North America. Documented occurrences include Val Verde County in western Texas and adjacent areas in New Mexico. The appears to have a restricted range within the Chihuahuan Desert region.
Seasonality
have been observed in late May to early June. Activity coincides with blooming of Echinocereus enneacanthus carnosus and other desert flowers.
Host Associations
- Echinocereus enneacanthus carnosus - flower visitor observed feeding on or visiting flowers
Behavior
have been observed flying to and landing on flowers of cactus. Multiple individuals may visit the same flower cluster simultaneously. When disturbed, adults may drop from flowers and remain motionless (). Activity appears concentrated during morning hours before peak daytime temperatures.
Human Relevance
Of interest to due to its rarity. Not known to be of economic importance.
Similar Taxa
- Acmaeodera riograndeiSimilar size and ; collected together on Echinocereus flowers. Distinguished by elytral pattern and structural details.
- Acmaeodera robigoFormerly confused with A. starrae in field observations; similar size and flower-visiting on cactus blooms.
- Acmaeodera neoneglectaCollected sympatrically on cactus flowers; more common and widespread than A. starrae.
More Details
Taxonomic history
Field observations from 2022 initially identified specimens as A. starrae, but subsequent examination suggested some may have been A. robigo. This indicates potential identification challenges between these and the need for careful verification.
Collection method
Most effectively collected by visual searching and aspirating from cactus flowers during bloom period, or by netting adults in approaching flowers.