Kauaʻi record · KCA-IA-00751
Crossotarsus externedentatus
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About Crossotarsus externedentatus
Crossotarsus externedentatus is a member of Curculionidae in the order Coleoptera. Its recorded origin status on Kauaʻi is introduced / adventive.
Crossotarsus externedentatus is an introduced pinhole/ambrosia beetle documented from Kauaʻi in mixed ʻōhiʻa forest and rapid ʻōhiʻa death investigations.
Kauaʻi occurrence evidence: Roy et al. (2023) list Crossotarsus externedentatus among beetles associated with ROD on Kauaʻi. Hawaiʻi Department of Agriculture non-target screening materials classify the species as exotic in Hawaiʻi.
The cited occurrence evidence does not by itself establish current abundance or population trend on Kauaʻi.
Life cycle
Egg; larva; pupa; adult; gallery-associated development in woody substrate typical of ambrosia/pinhole beetles; species-specific timing remains to be sourced.
Habitat
Documented in Kauaʻi ʻōhiʻa forest rapid ʻōhiʻa death investigations; wood/host associations beyond the study system require species-specific completion.
Food and ecological role
Wood-boring/gallery beetle associated with symbiotic fungi; exact host and fungal associations on Kauaʻi require species-specific completion.
Reproduction
Breeding occurs in galleries excavated in woody material; species-specific mating system and brood details remain to be sourced.
Movement
Adults disperse by flight; Kauaʻi dispersal distances and seasonal flight patterns require species-specific evidence.
Ecosystem role
Introduced wood-associated ambrosia/pinhole beetle in Kauaʻi forest arthropod communities.
Monitoring
Lock exact collection localities/specimen details where available, current-name authority, host associations, and exact-taxon public reference media/license.
Names and classification
- Scientific name
- Crossotarsus externedentatus
- Family
- Curculionidae
- Order
- Coleoptera
- Record type
- species
Kauaʻi occurrence and status
- Kauaʻi occurrence
- Present
- Origin
- Introduced / adventive
- Conservation status
- Not assessed
Process and seasonal context
- Seasonal description
- Crossotarsus externedentatus is a member of Curculionidae in the order Coleoptera. Its recorded origin status on Kauaʻi is introduced / adventive.