Chrysobothris culbersoniana

Knull, 1943

Chrysobothris culbersoniana is a jewel beetle in the Buprestidae, described by Knull in 1943. It belongs to the Chrysobothris femorata species group, a taxonomically challenging complex of wood-boring beetles that was revised by Wellso and Manley in 2007. The species is known from limited records in North America, with observations documented from Texas and New Mexico.

Pronunciation

How to pronounce Chrysobothris culbersoniana: /ˌkɹɪsəˈbɒθɹɪs kʌlˌbɜːrsəˈnaɪənə/

These audio files are automatically generated. While they are not always 100% accurate, they are a good starting point.

Identification

As a member of the Chrysobothris femorata group, C. culbersoniana can only be reliably distinguished from closely related species through examination of subtle morphological character suites rather than single diagnostic features. Identification requires assessment of characters including antennal shape, elytral foveae arrangement, pygidial , elytral and cross-, and callosity shape and coloration. The species is smaller than C. femorata and differs in having connected rather than separated post- elytral foveae and arcuate rather than straight posteriolateral elytral margins.

Habitat

Based on related in the femorata group, likely associated with woody plants in forested or woodland . Other members of this species group utilize diverse deciduous tree hosts.

Distribution

North America. Documented from Texas (Culberson County, type locality) and New Mexico. GBIF records indicate presence in North America with limited observation data.

Diet

Larval development occurs in wood of plants. Specific host associations for C. culbersoniana are not documented, though related in the femorata group primarily utilize Celtis (hackberry), Cercis, and Ebanopsis.

Host Associations

Celtis - larval inferred from related C. caddo
Cercis - larval inferred from related C. caddo
Ebanopsis - larval inferred from related C. caddo

Life Cycle

Complete with , larval, pupal, and stages. Larvae are wood-borers that develop in living or recently dead woody plant tissue. Adults emerge through characteristic round exit holes.

Behavior

are , active on sunny days, and quick to take when disturbed. Like other Chrysobothris, they are alert and rapid-moving beetles that rely on cryptic coloration for avoidance.

Ecological Role

Larvae function as primary decomposers in dead and dying wood, contributing to nutrient cycling in forest . Their boring activity creates galleries that may provide for other organisms.

Human Relevance

Members of the Chrysobothris femorata group include economically important pests of shade and fruit trees. While C. culbersoniana itself is not documented as a significant pest, its relatives cause damage through larval tunneling in tree trunks.

Similar Taxa

Chrysobothris caddoClosely related member of femorata group with similar size and general appearance; distinguished by specific character combinations of antennal shape, pygidial , and elytral margin shape
Chrysobothris femorataLarger in same group with straight posteriolateral elytral margins and reddish elytral tips versus arcuate margins and bronze tips in C. culbersoniana
Chrysobothris quadriimpressaSimilar size and appearance but with shallowly impressed versus deeply impressed pygidium in C. culbersoniana

More Details

Taxonomic History

The Chrysobothris femorata group was comprehensively revised by Wellso and Manley in 2007, doubling the number of described species from 6 to 12. This revision was necessary because multiple species were previously masquerading under the catch-all name C. femorata. Chrysobothris culbersoniana was described by Knull in 1943, predating this revision. The species group remains difficult to identify due to reliance on suites of subtle characters rather than single key features.

Collection and Study

The is rarely encountered and poorly represented in collections. Only 4 observations are recorded in iNaturalist as of the knowledge cutoff. The author of the source material (Ted C. MacRae) has collected numerous specimens of related species in this group but does not list C. culbersoniana among his collected species, suggesting it remains a target for field collectors.