Xyleborini

Faccoli, Massimo, Frigimelica, Gabriella, Mori, Nicola, Toffolo, Edoardo Petrucco, Vettorazzo, Marco & Simonato, Mauro, 2009, First record of Ambrosiodmus (Hopkins, 1915) (Coleoptera: Curculionidae, Scolytinae) in Europe, Zootaxa 2303, pp. 57-60 : 59-60

Key to the genera of Xyleborini occurring in Europe

This key is intended to facilitate the identification of the Xyleborini genera occurring in Europe. The key, modified from Faccoli (2008) which provides keys of the European species belonging to each genus, is based on adult females. The arrangement of the genera in the key is not phylogenetic.

1 Procoxae widely separated; body very stout, 1.9 − 2.3 times longer than wide; declivity convex and devoid of major processes ......................................................................................................................................... Xylosandrus Reitter

- Procoxae contiguous; body slender ( Fig. 1 a); elytral declivity flat or variously sculptured ........................................2

2 Pronotal asperities covering most of discal area ( Figs. 1 a, b); anterior margin of pronotum never armed by a definite row of serrations ( Figs. 1 a, b, d); lateral margin of protibia armed by 7–8 denticles ( Fig. 2 b) ..................................... .................................................................................................................................................. Ambrosiodmus Hopkins

- Pronotal asperities confined to the anterior half of the discal area; anterior margin of pronotum armed or not by a definite row of serrations; lateral margin of protibia armed by more than 8 denticles................................................. 3

3 Scutellum conical, not filling scutellar notch; elytral declivity with suture notched, margins dentate and abundant setae................................................................................................................................................. Xyleborinus Reitter

- Scutellum flat, entirely filling scutellar notch and flush with adjacent elytral surface; elytral declivity flat...............4

4 Pronotum rounded, as long as wide; anterior margin armed with 6 to 8 subequal serrations directed forward; 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; if as long as wide 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 .................................................................................................................................................................. 5

5 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

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

Figures

FIGURE 1. Ambrosiodmus rubricollis (Eichhoff, 1875): a, female, dorsal habitus; b, female pronotum, dorsal view; c, male, dorsal habitus; d, female pronotum, lateral view.

FIGURE 2. Ambrosiodmus rubricollis (Eichhoff, 1875): a, antenna, showing anterior face of club; b, protibia.