Xyleborus


Type species

Bostrichus monographus Fabricius

Adapted from Wood 1982, p. 776-846


Diagnosis

Xyleborus have an obliquely truncate club with only one suture visible on the posterior face. The procoxae are contiguous, and the scutellum is large and flushed with the elytra. This is a large and somewhat artificial genus that will eventually get divided into several others.


Description

Species in this genus range from 1.6 to 5.9 mm in length and are approximately 1.9 to 3.4 times as long as wide. Sexual dimorphism is extreme with rare and flightless males. Their color varies from yellowish brown to black. The pronotum proportion is variable, but is more frequently longer than wide. The scutellum is large and flush with the surface of elytra. The declivity is convex to concave and unarmed to bearing granules or spines. The anterior margin of the compound eye is emarginate. The scape length in proportion to the funicle is variable and the funicle is 5-segmented. The club is obliquely truncate, with only one recurved suture on its posterior face. They have a depressed pregular region. The anterior coxae are contiguous to subcontiguous.


Distribution

Worldwide


World fauna

Number of species: 564, Native species: 9, Introduced species: 7


Established exotic species

Xyleborus atratus is present in Ohio, Delaware, Maryland, Virginia, West Virginia, Kentucky, Tennessee, North Carolina, South Carolina, Georgia, Florida, Alabama, Mississippi, Louisiana, Texas, Missouri, and Kansas.

Xyleborus californicus is present in Delaware, Maryland, North Carolina, South Carolina, Georgia, Florida, Alabama, Mississippi, Louisiana, Texas, Tennessee, Arkansas, Kansas, Washington, Oregon, and California.

Xyleborus glabratus is present in South Carolina, Georgia, and Florida.

Xyleborus pelliculosus is present in Maine, New Jersey, Pennsylvania, Delaware, Maryland, Virginia, North Carolina, Kentucky, Tennessee, and Alabama.

Xyleborus pfeili is present in New Jersey, Maryland, Georgia, and Oregon.

Xyleborus seriatus is present in Maine and Massachusetts.

Xyleborus similis is present in Louisiana and Texas.


Hosts

Alexa, Acer, Anacardium, Astronium, Betula, Bishofia, Bombacopsis, Brosimum, Brownia, Bursera, Carya, Castanea, Cecropia, Cespedesia, Cedrella, Citrus, Clethra, Coffea, Conostegia, Cornus, Cordia, Corylus, Crotalaria, Couma, Dacryodes, Dendropanax, Diphysia, Eschweilera, Enterolobium, Erythrina, Eugenia, Fagara, Fagus, Ficus, Fissicalyx, Guazuma, Hevea, Ichthyomethia, Inga, Jacaranda, Juglans, Kalmia, Lecythia, Licania, Lonchocarpus, Lindera, Margifera, Melicoccora, Melicoccous, Miconia, Myrica, Nyssa, Ochroma, Persea, Phoebe, Pinus, Pithacellobium, Pleiogynum, Populus, Pouteria, Prunus, Psidium, Protium, Pyrus, Quercus, Rhus, Sassafras, Salix, Sacoglothia, Schizolobium, Sloanea, Spondias, Swietenia, Taxodium, Terminalia, Theobroma, Toulicia, Trichilia, Virola, Vismia, Vitis