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Southern pine beetle

Scientific Name
Dendroctonus frontalis
Scientific Author
Zimmermann
Taxonomy
(Coleoptera: Curculionidae: Scolytinae: Hylesinini)

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Diagnostic Notes
Diagnosis: The genus Dendroctonus can be distinguished from the Tomicina, Hylurgus and Tomicus, and Xylechinus, by the anterior margin of their compound eye. The genus includes some of the largest specimens Scolytinae.

Description: This genus includes species with the larger size, ranging from  2.5 to 9.0 mm in length and approximately 2.3 to 2.6 times as long as wide. Their body colour is dark brown to black, some species with reddish brown elytra. The pronotum is wider than long and unarmed. The scutellum is small. The declivity is convex with hair-like setae. The vestiture consist of erect hair-like setae. The anterior margin of the compound eye is entire. The scape is as long as, to slightly longer than, the 5-segmented funicle. The club is spatulate with three procured sutures. The procoxae are contiguous.

Adults are 2 to 4 mm in length, short-legged, cylindrical and brown to black in colour.

The broad and prominent head has a distinct notch or frontal groove on male beetles. The antennae are seven-segmented, consisting of the basal pedicel, elongated scape, four-segmented funicle, and an enlarged club.>

The prothorax is shiny and slightly narrowed toward the head. Its surface is thinly covered with different-sized punctures and a relatively smooth, distinct dorsal line. The elytra have fine to coarse rubosites between rows of obscure to distinct punctures. The elytral declivity is convex.

Females are distinguished from males by the presence of a transverse, rather broad elevated ridge, called a mycangium, on the anterior pronotum. Males lack the mycangium but have a distinct frontal groove, and elevations or tubercles on the head are more distinct.

New adults progressively change in color from yellowish-white to yellowish-brown to reddish-brown to finally become dark brown.

Sources:

http://creatures.ifas.ufl.edu/trees/southernpinebeetle.htm

Thatcher RC, Searcy JL, Coster JE, Hertel GD, eds. 1980. (See references)

More Information
Author
Walker, K.
Created
09/11/2005 11:26 AEST
Last Updated
25/11/2011 10:47 AEST
Citation
Walker, K. (2005) Southern pine beetle (Dendroctonus frontalis) Updated on 11/25/2011 10:47:55 AM Available online: PaDIL - http://www.padil.gov.au.
Image Use
Free for use under the Creative Commons Attribution 3.0 Australia License

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