Xylosandrus

Dole, Stephanie A. & Beaver, Roger A., 2008, A Review of the Australian Species ofXylosandrusReitter (Coleoptera: Curculionidae: Scolytinae), The Coleopterists Bulletin 62 (4), pp. 481-492 : 481-492

Key to females of species of Xylosandrus known or likely to be imported

to Australia

We have included in this key two species, Xylosandrus compactus (Eichhoff) and X. crassiusculus (Motschulsky) with an almost circumtropical distribution, which have not yet been recorded from Australia, but are very likely to be imported in the future. We hope that this will aid their identification by those concerned with quarantine measures.

1 Margin of elytral declivity carinate to 7th interstriae......................... 2

– Margin of elytral declivity rounded, granulate, or tuberculate but without a continuous carina................................................................ 5

2 Elytral disc gradually curving into declivity................................... 3

– Declivital face of elytra steep and abruptly separated from disc............ 4

3 Entire declivital face dull, densely, finely, confusedly granulate, striae indicated only by rows of longer hairs. 2.0– 2.5 mm long........................................................................ X. crassiusculus (Motschulsky)

– Face of elytral declivity shining, not confusedly granulate, strial punctures distinct, interstriae uniseriate granulate-punctate. 1.5–1.9 mm long..................................................................... X. compactus (Eichhoff)

4 Basal part of pronotal disc dull, densely punctured. Elytral declivity steeper, more sharply separated from disc. Interstriae on declivity irregularly multiseriate punctate, with short, fine, semi-appressed hairs, some of which are slightly flattened. Strial punctures on declivity very closely placed. Body bicolored, elytra darker than pronotum. 1.8–2.0 mm long............................................................................... X. discolor (Blandford)

– Basal part of pronotal disc shining, sparsely punctured. Elytral declivity less steep, less sharply separated from disc. Interstriae on declivity uniseriate punctate, with long, erect hairs. Strial punctures on declivity less closely placed. Body uniformly light to dark brown. 1.5–2.0 mm long....................................................................... X. morigerus (Blandford)

5 Pronotum with median tuft of hairs at base. Punctures on elytra in single row. Declivital margin with distinct row of tubercles extending to interstria 7. Smaller species, 1.6–2.0 mm long.............................................. 6

– Pronotum without median tuft of hairs at base. Punctures on elytral interstriae in two rows or confused. Declivital margin either rounded or with indistinct tubercles. Larger species, 2.3–3.4 mm long......................... 7

6 Declivital face steep and abruptly separated from disc. Interstrial setae on declivity short, acutely tapering, slightly flattened, semi-erect, contrasting with short, appressed, hairlike strial setae. 1.6–1.9 mm long......................................................................... X. queenslandi new species

– Elytral disc gradually curving into declivity. Interstriae on declivity with long, fine, erect hairs, striae with shorter, semi-appressed hairs. 1.9–2.0 mm long........................................................ X. abruptulus (Schedl)

7 Larger species, 3.0– 3.4 mm long. Interstriae on disc generally with 3–4 rows of hairs. Declivital margin rounded. Basal part of pronotal disc with simple punctures............................................... X. monteithi new species

– Smaller species, 2.3–2.4 mm long. Interstriae on disc generally with 2 rows of hairs. Declivital margin with series of small tubercles. Punctures on basal part of pronotum weakly granulate........................... X. woodi new species