Agrilus turnbowi
Nelson, 1990
mistletoe buprestid
Agrilus turnbowi is a small metallic wood-boring described from southern Texas in 1990. It is notable as the first documented to develop in mistletoe, specifically within dead stems of Phoradendron tomentosum parasitizing mesquite. The species exhibits purplish-red coloration with complex patterns of golden on the , traits shared with related Mexican species A. andersoni and A. howdenorum that also associate with mistletoe .
Pronunciation
How to pronounce Agrilus turnbowi: /ˈæɡrɪləs tɜːrnˈboʊwi/
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Identification
Distinguished from other Agrilus by its association with mistletoe and its distinctive purplish-red ground color combined with intricate golden setal patterns on the . At the time of its original description, it could not be related to any other known species in the . Closely resembles A. andersoni and A. howdenorum from Mexico, which share similar coloration and setal patterns, but differs in specific details of size and elytral setation.
Habitat
Associated with mistletoe-infested mesquite in warm temperate regions. develop within dead stems of Phoradendron tomentosum attached to living mesquite (Prosopis glandulosa) trees.
Distribution
Known from southern Texas, USA. The locality is in Texas where specimens were reared from mistletoe on mesquite. Distribution records in GBIF include broader North presence, though specific locality data beyond the type series are sparse.
Host Associations
- Phoradendron tomentosum - larval Dead stems of this mistletoe serve as larval development site
- Prosopis glandulosa - indirect Living mesquite tree to which the mistletoe is attached
Life Cycle
tunnel within dead stems of mistletoe (Phoradendron tomentosum) for development, a departure from the typical Agrilus habit of utilizing dead woody branches of trees and shrubs.
Behavior
are likely found on foliage of their larval plants, consistent with general Agrilus , though specific adult behavior for this has not been separately documented.
Ecological Role
Contributes to through decomposition of dead mistletoe stems. Represents a specialized associated with an obligate hemiparasitic , supporting -restricted diversity in mistletoe .
Similar Taxa
- Agrilus andersoniShares purplish-red coloration and complex golden setal patterns on ; also develops in Phoradendron mistletoe in Mexico
- Agrilus howdenorumSimilar purplish-red ground color and golden pattern; associated with same mistletoe in Oaxaca, Mexico
More Details
Evolutionary significance
A. turnbowi was the first documented to exploit mistletoe as a larval , establishing a novel host association within a of otherwise primarily wood-boring . This discovery led to identification of additional mistletoe-associated Agrilus species in Mexico, suggesting unrecognized diversity in this specialized .
Taxonomic uniqueness
At the time of its 1990 description, A. turnbowi was considered unrelated to any other known Agrilus . Subsequent discoveries of A. andersoni and A. howdenorum revealed a small clade of mistletoe-associated species sharing distinctive coloration and setal patterns, potentially representing an adaptive radiation onto this unusual .