Chrysobothris purpureovittata
Horn, 1886
Chrysobothris purpureovittata is a metallic wood-boring in the . It is notable among its for being exceptionally , with documented larval spanning over two dozen of deciduous trees across 21 and 11 families. The species occurs primarily in the central and south-central United States, with two recognized : the nominate form and C. p. cercocarpi, which is restricted to mountain mahogany in New Mexico.
Pronunciation
How to pronounce Chrysobothris purpureovittata: /ˌkrɪsoʊˈbɒθrɪs ˌpɜːrpjʊrioʊvɪˈtɑːtə/
These audio files are automatically generated. While they are not always 100% accurate, they are a good starting point.
Identification
Distinguished from other Chrysobothris by its combination of red with greenish reflections and purple-striped . The C. p. cercocarpi is recognized by its entirely red pronotum without greenish reflections and uniformly dark elytra, and is restricted to Cercocarpus montanus in New Mexico. Separation from other Chrysobothris requires examination of elytral punctation and male .
Habitat
Deciduous woodlands, forest edges, and riparian areas where trees occur. Found in both upland and lowland situations across its range. are encountered on living and dead branches of host trees, particularly those showing stress or decline.
Distribution
Central and south-central United States: Indiana west to Kansas and south to Mississippi and northern Mexico. Western in New Mexico (Otero County, Cloudcroft area) represent the C. p. cercocarpi.
Seasonality
active primarily during late spring and early summer. Peak activity in June, with records extending from May through July depending on latitude and elevation.
Diet
mine beneath bark and in cambium of dead or dying branches of hardwood trees. feed on foliage and possibly other tissues, though specific adult feeding habits are poorly documented.
Host Associations
- Celtis tenuifolia - larval dwarf hackberry
- Celtis laevigata - larval sugar hackberry
- Celtis ehrenbergia - larval desert hackberry
- Celtis reticulata - larval netleaf hackberry
- Ulmus crassifolia - larval cedar elm
- Ulmus rubra - larval slippery elm
- Ulmus americana - larval elm
- Prunus sp. - larval plums
- Quercus sp. - larval oaks
- Cercocarpus montanus - larval mountain mahogany; exclusive of C. p. cercocarpi
Life Cycle
with wood-boring larval stage. tunnel beneath bark and in cambium, creating galleries that branches. occurs within the wood, with emerging through D-shaped exit holes. Multiple per year possible in southern portions of range.
Behavior
are and readily take when disturbed. They are frequently collected by beating dead or dying branches of trees onto a sheet. When alarmed, individuals dodge to the backside of branches before flying away.
Ecological Role
As a primary wood-borer, contributes to by breaking down dead and dying woody material. Creates for secondary inhabitants in decaying branches. Serves as for woodpeckers and other .
Human Relevance
Occasional pest of landscape trees, particularly elms and hackberries in urban settings. Not considered economically significant compared to some . Of interest to due to its attractive coloration and relative abundance.
Similar Taxa
- Chrysobothris femorataAlso and broadly ; distinguished by elytral punctation and color pattern details
- Chrysobothris maliSimilar range including Rosaceae; requires examination of male and elytral for separation
- Chrysobothris piutaAssociated with Cercocarpus in western areas; more restricted range and different elytral pattern
More Details
Subspecies
Chrysobothris purpureovittata cercocarpi Westcott & Nelson, 2000 was described from in the Sacramento Mountains of New Mexico associated exclusively with mountain mahogany (Cercocarpus montanus). It is distinguished from the nominate by the entirely red without greenish reflections and uniformly dark .
Host Range Expansion
The exceptional polyphagy of this was not fully appreciated until comprehensive surveys in Missouri (MacRae 1991) and subsequent studies revealed larval development in over 20 tree species across multiple , far exceeding the elm and plum originally recorded by Fisher (1942).