Dinapate wrightii

Horn, 1886

Giant Palm Borer

Dinapate wrightii, the Giant Palm Borer, is the largest in the , reaching approximately 5 cm in length. are non-feeding and live about two weeks. The species is to extreme southern California and Baja California Sur, Mexico, with most records from the Coachella Valley. It is a pest of fan palms, particularly Washingtonia species.

Dinapate wrightii by (c) W. Terry Hunefeld, some rights reserved (CC BY), uploaded by W. Terry Hunefeld. Used under a CC-BY license.Dinapate wrightii by (c) Lic. Kevin Miguel Garibaldi Fierro, some rights reserved (CC BY), uploaded by Lic. Kevin Miguel Garibaldi Fierro. Used under a CC-BY license.Dinapate wrightii by (c) Lic. Kevin Miguel Garibaldi Fierro, some rights reserved (CC BY), uploaded by Lic. Kevin Miguel Garibaldi Fierro. Used under a CC-BY license.

Pronunciation

How to pronounce Dinapate wrightii: //ˌdaɪnəˈpeɪti ˈraɪtaɪ.aɪ//

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

Identification

The largest , approximately 5 cm (2 inches) in length. are and cylindrical, typical of the Bostrichidae. are wood-boring that tunnel extensively through palm crowns and trunks.

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Habitat

Associated with fan palms, especially in desert oasis environments. and occupy tunnels within palm crowns, with tunnels extending up to ten inches deep into the wood.

Distribution

to extreme southern California (primarily the Coachella Valley) and Baja California Sur, Mexico. The Mexican record from Baja California Sur extends the known range from an earlier specimen collected 500 km forward of Baja California nearly 80 years prior.

Diet

do not feed. feed on palm wood, tunneling through crowns and trunks of palms for one to several years.

Host Associations

  • Washingtonia filifera - desert fan palm
  • Washingtonia robusta - Mexican fan palm

Life Cycle

are deposited in tunnels excavated by females. hatch within several days and feed for one to several years before maturing. occurs within the palm. emerge, mate in tunnels, and live approximately two weeks without feeding.

Behavior

Females locate fan palms and tunnel into crowns; males follow females into tunnels where mating occurs. Females excavate tunnels up to ten inches deep for . tunnel continuously while feeding.

Ecological Role

Serious pest of desert palms. Larval tunneling damages palm crowns and can compromise structural integrity of trees.

Human Relevance

Considered a pest of ornamental and fan palms, particularly Washingtonia used in landscaping. Economic impact on palm and maintenance in its native range.

Similar Taxa

  • Other BostrichidaeDistinguished by exceptional size (largest in ), specific association with fan palms, and geographic restriction to southwestern North America.

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Sources and further reading