Bostrichidae, Latreille, 1802

Zhang, Yi-Feng, Meng, Ling-Zeng & Beaver, Roger A., 2022, A review of the non-lyctine powder-post beetles of Yunnan (China) with a new genus and new species (Coleoptera: Bostrichidae), Zootaxa 5091 (4), pp. 501-545 : 504-505

Key to Subfamilies of Bostrichidae in Yunnan Province

(modified from Borowski & Węgrzynowicz 2012)

1 Head prognathous, easily visible from above; body slightly flattened; anterior part of pronotum without semicircular rows of teeth and without distinct apex............................................................................2

- Head hypognathous, not or only in small part visible from above; body cylindrical, Pronotum anteriorly with numerous denticles arranged into semicircular rows..................................................................... 3

2(1) Procoxae separated by prosternal process which is narrowest at midlength; protibiae with large, outwardly curved spur............................................................................... .. Polycaoninae Blanchard, 1851

- Procoxae separated only in anterior part by a short pointed prosternal process not extending to midlength; protibiae with small, thin and almost straight spur.......................................................... Psoinae Blanchard, 1851

3(1) Prothorax in dorsal view evenly rounded in front; metatarsi distinctly shorter than metatibae ( Fig. 2B )................................................................................................ Dinoderinae Thomson, 1863

- Prothorax in dorsal view flattened or excavate in front; metatarsi as long as metatibiae or longer ( Fig. 2A )............... 4

4(3) Metacoxae distinctly separated by process of first sternite, which is flat and triangular, or narrow and slat-like ( Fig. 3A ), but if the latter, then length of body below 20 mm; first two antennomeres of antennal club elongated or equilateral, or all three strongly transverse.............................................................. Bostrichinae Latreille, 1802

- Metacoxae contiguous, abdominal process reduced, hidden under protruding coxae, coxae separated with narrow slat-like process; first two antennomeres of club transverse, triangular in outline, inner margin of last antennomere characteristically emarginated................................................................ Apatinae Jacquelin du Val, 1861

Figures

FIGURE 2. Metatarsi of Bostrichinae (A) and Dinoderinae (B). Both horizontal scale bars of A and B = 1mm.

FIGURE 3. Intercoxal process of first abdominal ventrite of Bostrichini (A) and Xyloperthini (B).