Chrysobothris wintu

Wellso & Manley, 2007

Chrysobothris wintu is a metallic wood-boring beetle in the Buprestidae, described in 2007 by Wellso and Manley as part of their revision of the Chrysobothris femorata -group. It is one of several cryptic species historically confused under the catch-all name C. femorata. The species is restricted to Arizona and California, where it develops in oak and occasionally other woody . Like other members of its species-group, it is difficult to identify based on single characters and requires evaluation of a suite of morphological features.

Pronunciation

How to pronounce Chrysobothris wintu: /ˌkrɪsəˈbɒθrɪs ˈwɪntuː/

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Identification

Chrysobothris wintu belongs to the Chrysobothris femorata -group, whose members are distinguished by suites of subtle characters rather than single diagnostic features. Identification requires microscopic examination of characters including: shape (narrowed versus quadrate apices), post- elytral foveae configuration (joined versus separated), pygidial impression depth and margin structure, elytral posterolateral margin shape and tip coloration, elytral and cross- patterns, and callosity shape and coloration. Geographical occurrence in Arizona and California automatically eliminates all other species in the group except C. comanche, C. mescalero, and C. shawnee, which are distinguished by association and additional morphological characters.

Distribution

Arizona and California.

Diet

Larvae develop in wood of primarily Quercus (oak), and have also been reared from Salix (willow) and Prunus (plum/cherry).

Host Associations

Quercus - primary larval primarily associated with
Salix - secondary larval also reared from
Prunus - secondary larval also reared from

Life Cycle

Like other Chrysobothris , are laid on plant trunks or branches. Larvae hatch and bore into the wood, where they feed and develop through several instars before pupating and emerging as . Specific details of developmental timing for this species have not been documented.

Ecological Role

As a wood-boring , larvae contribute to the decomposition of dead and dying woody plant material, particularly oaks. Their specificity to Quercus suggests a role in oak woodland processes.

Human Relevance

Not known to be an economic pest. Unlike the related Chrysobothris femorata, which is a significant pest of shade and fruit trees, C. wintu appears restricted to native oak and has not been documented causing damage to ornamental or agricultural plantings.

Similar Taxa

Chrysobothris comancheOverlaps in Arizona and New Mexico; distinguished by exclusive association with Juglans (walnut) and lack of elytral cross- with indistinct foveae
Chrysobothris mescaleroOverlaps in Arizona and New Mexico; distinguished by exclusive association with Quercus but differs in morphological characters including callosity structure
Chrysobothris shawneeOverlaps in Arizona and extends eastward; primarily associated with Quercus but has larger, bronze-black callosities rather than transverse bronze callosities
Chrysobothris femorataWidespread historically confused with C. wintu; distinguished by straight elytral posterolateral margins with reddish tips rather than arcuate margins with bronze tips
Chrysobothris caddoSimilar but geographically separated; occurs from Florida west to Arizona and north to Missouri, primarily associated with Celtis (hackberry)

More Details

Taxonomic History

Chrysobothris wintu was described in 2007 by Wellso and Manley as part of a comprehensive revision of the Chrysobothris femorata -group. This revision doubled the number of described species in the group, bringing clarity to a long-standing taxonomic problem where multiple cryptic species were masquerading under the name C. femorata. The specific epithet honors the Wintu people, to northern California where the species occurs.

Type Material

Specimens now assignable to Chrysobothris wintu were included in the original type series as , having been collected by the author prior to the ' formal description.