Dinoderinae, C. G. Thomson, 1863

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 : 508

Key to species of subfamily Dinoderinae

(modified from Borowski & Węgrzynowicz 2012)

1 Frons short, indistinctly separated from clypeus; labrum longer than clypeus and frons together....................... 2

. Frons about as long as clypeus, conspicuous, distinctly separated; labrum at most as long as clypeus and frons together ( Fig. 15).................................................. Orientoderus orientalis ( Borowski et Węgrzynowicz, 2011)

2(1) Head behind eyes smooth and lustrous; body strongly elongated; elytral punctures in regular rows; setae on elytra either fine and recumbent or arcuately curved and semierect............................. Rhyzopertha dominica (Fabricius,1792)

. Head behind eyes densely punctured, granulate or finely wrinkled; body short and squat; elytral punctures irregularly dispersed or arranged in short rows, if rows long and regular then joints of antennal club markedly transverse; setae on elytra most apparent on declivity, erect, straight, of pointed or thickened tips, sometimes squamiform ( Dinoderus Stephens, 1830 )......... 3

3(2) First tarsomere short, distinctly shorter than second and third together; last tarsomere longer than sum of all the remaining. Tarsi without ventral brushes of long setae ( Fig. 11D ) ( Dinoderus s.str.)...............................................4

. Proximal tarsomere long, at least as long as the next two together; distal tarsomere somewhat shorter than sum of others. Ventral side of basal two tarsomeres with brushes of long setae ( Fig. 7E ) ( Dinoderastes Lesne, 1914 )..........................9

4(3) Antennae with 11 antennomeres.......................................................................... 5

. Antennae with 10 antennomeres..........................................................................6

5(4) Prescutellar depressions indistinct; setae on elytral declivity very fine, thin, clearly discernible only when viewed obliquely from side; body elongated, slender ( Fig. 13 )..................................... D. (Dinoderus) piceolus Lesne,1933

. Prescutellar depressions distinct, deep; setae on elytral declivity conspicuous, long, pointed or squamiform; body short and squat ( Fig. 11 )............................................................ D. (Dinoderus) favosus Lesne,1911

6(4) Antennomeres 1-7 with dense brushes of long erect setae ( Fig. 12 )............... D. (Dinoderus) ocellaris Stephens,1830

. Antennomeres 1-7 without brushes of long setae, usually with only sparse, fine and not very long erect setae.............7

7(6) Median two teeth on apical margin of pronotum narrow at bases, protruding forwards and close to one another; intervals on apical part of elytra, especially on elytral declivity, strongly elevated and irregularly covered with papillae and denticles; body short, squat, mat, microsculpture conspicuous ( Fig. 10 )........................ D. (Dinoderus) creberrimus Lesne,1941

. Median two teeth on apical margin of pronotum wide at bases, not protruding forwards and typically widely separated; intervals on apical part of elytra, especially on elytral declivity, not elevated and without papillae or denticles; body short and squat or elongated and narrow, more or less lustrous.................................................................8

8(7) Anterior margin of pronotum with 8, less frequently with 10, teeth; elytra seen from side evenly setose along their length...................................................................... D. (Dinoderus) minutus (Fabricius, 1775)

. Anterior margin of pronotum with 12, less frequently with 10 or 14 teeth; elytral setae as seen from side less apparent and distinctly shorter in basal half than on elytral declivity ( Fig. 13 ).............. D. (Dinoderus) ochraceipennis Lesne, 1906

9(3) Antennae with 11 antennomeres.......................................... D. (Dinoderastes) japonicus Lesne, 1895

. Antennae with 10 antennomeres........................................................................ 10

10(9) Elytral declivity with a large, smooth, impunctate and lustrous area on both sides of suture ( Fig. 9C )........................................................................................ D. (Dinoderastes) speculifer Lesne,1895

. Elytral declivity coarsely and densely punctured without a large, smooth, impunctate area.......................... 11

11(10) Suture of declivity convex, scutellar shield square or sub-square ( Fig. 7B ).......... D. (Dinoderastes) hongheensis sp.nov.

. Suture of declivity flat and not convex, scutellar shield transversely rectangular ( Fig. 8B )................................................................................................. D. (Dinoderastes) nanxiheensis sp.nov.

Figures

FIGURE 7. (A, B, C, D, E) Lateral (A), dorsal (B), posterior 45° angel (C), head (D) and posterior tarsi (E) views of Dinoderus (Dinoderastes) hongheensis sp. nov.. Total horizontal scale bar of B =1 mm; 1 micro scale bar of E = 0.01 mm, total micro scale bar of E = 0.2 mm.

FIGURE 8. (A, B, C, D, E) Lateral (A), dorsal (B), posterior 45°angel (C), antennae (D) and declivity (E) views of Dinoderus (Dinoderastes) nanxiheensis sp. nov.. Total horizontal scale bar of B =1 mm.

FIGURE 9. (A, B, C) Lateral (A), dorsal (B), posterior 45° angel (C) views of Dinoderus (Dinoderastes) speculifer Lesne, 1895. Total horizontal scale bar of B =1 mm.

FIGURE 10. (A, B) Lateral (A) and dorsal (B) views of Dinoderus (Dinoderus) creberrimus Lesne, 1941. Total horizontal scale bar of B =1 mm.

FIGURE 11. (A, B, C, D) Lateral (A), dorsal (B), head (C) and posterior tarsi (D) views of Dinoderus (Dinoderus) favosus Lesne, 1911. Total horizontal scale bar of B =1 mm;1 micro scale bar of D = 0.01 mm, total micro scale bar of D = 0.2 mm.

FIGURE 12. (A, B) Lateral (A) and dorsal (B) views of Dinoderus (Dinoderus) ocellaris Stephens, 1830. Total horizontal scale bar of B =1 mm.

FIGURE 13. (A, B) Lateral (A) and dorsal (B) views of Dinoderus (Dinoderus) ochraceipennis Lesne, 1906. Total horizontal scale bar of B =1 mm.

FIGURE 15. (A, B) Lateral (A) and dorsal (B) views of Orientoderus orientalis Borowski et Węgrzynowicz, 2011. Total hori- zontal scale bar of B =1 mm.