Xyleborini

Faccoli, Massimo, 2008, First record of Xyleborus atratus Eichhoff from Europe, with an illustrated key to the European Xyleborini (Coleoptera: Curculionidae: Scolytinae), Zootaxa 1772, pp. 55-62 : 58-59

Key to the genera of European Xyleborini (females, modified from Wood, 1986)

1 Procoxae widely separated ( Fig. 2 ); body very stout, 1.9–2.3x longer than wide; declivity convex and devoid of major processes ............................................................................................ Xylosandrus Reitter

- Procoxae contiguous ( Fig. 3 ); body slender; elytra variously sculptured....................................................2

2 Scutellum conical, not filling scutellar notch ( Fig. 4 ); elytral declivity with suture notched, margins dentate and abundant setae .................................................................................................. Xyleborinus Reitter

- Scutellum flat, entirely filling scutellar notch and flush with adjacent elytral surface ( Fig. 5 ); elytral declivity rounded........................................................................................................................................3

3 Pronotum rounded, as long as wide; anterior margin armed with 6 to 8 subequal serrations directed forward ( Fig. 9 ); interstriae never impressed on declivity; base of pronotum with median tuft of hairs; length 3.2–3.6 mm ..................................................................................................................... Anisandrus Ferrari

- Pronotum longer than wide ( Figs. 10–11 ); if as long as wide ( Fig. 12 ), then smaller species (≤ 3.0 mm); anterior margin of pronotum with serrations not directed forward; declivity sulcate with impressed interstriae; base of the pronotum without median tuft of hairs...........................................................................4

4 Elytral vestiture sparse, confined to strial and interstrial row; antennal club distinctly obliquely truncate, with segment 1 corneous, its distal margin very acutely elevated into a continuous edge forming a complete circle extending from anterior face to apex; sutures not visible on posterior face of the club ............. ....................................................................................................................................... Xyleborus Eichhoff

- Elytrae with abundant, confused, dense, semi-recumbant vestiture; antennal club obliquely truncate but with sutures visible on subapical area of posterior face ....................................... Cyclorhipidion Hagedorn

Figures

FIGURES 2 – 3. Front coxae: 2, Xylosandrus; 3, Xyleborus, Xyleborinus, Anisandrus and Cyclorhipidion.

FIGURES 4 – 5. Scutellum: 4, Xyleborinus; 5, Xyleborus, Anisandrus and Cyclorhipidion.

FIGURES 9 – 12. Pronotum: 9, Anisandrus dispar; 10, Xyleborus eurygraphus; 11, Xyleborus dryographus; 12, Xyleborus cryptographus.