Agrilus bidentulus Ganglbauer

Jendek, Eduard & Grebennikov, Vasily V., 2009, Revision of the Agrilus cyanescens species-group (Coleoptera: Buprestidae) with description of three new species from the east Palaearctic region, Zootaxa 2139, pp. 43-60 : 53

Agrilus bidentulus Ganglbauer

( Figs. 4 , 13 , 20 , 27, 37)

Agrilus bidentulus Ganglbauer, 1890: 22 , 31.

Type specimens. Holotype by monotypy, examined by Jendek (2002).

Type locality: “ China, Kan-ssu, Dorf Ter-ga”.

Material examined. China: Gansu: 1 3 ( EJCB): “ China, Gansu 20 km W Wu–du, 1800–2600, 1– 6.6.97 A. Shamajev leg.”; 1 3, 1 Ƥ ( EJCB): “ China Gansu prov. 120 km SW Lanzhou Ponggartang 30.VI.–2.VII.1992 Jaroslav Turna leg.”; 1 Ƥ ( EJCB): “ China 17.viii.1918 Kansou Hasitai”; 4 3 ( EJCB): “ China Kansu Ponggartang 30.Jun 1992 M. Bok lgt.”; Sichuan: 2 3 ( EJCB): “ China –Gansu Juizhaigon [sic!] 12– 17.6.2000 leg. E. Kučera”.

Diagnosis. Agrilus bidentulus is the only species of this group having flat metacoxal plates in males ( Fig. 37 ), while in other species the metacoxae protrude sharply outward ( Figs. 35–36, 38–41 ). This species is similar to A. asahinai in the conspicuously modified prosternal lobe armed in the male with two small spinules (Fig. 27). Females of both species have the prosternal lobe narrow and without spinules. Externally A. bidentulus resembles A. cyanescens with which it was considered conspecific (see Remarks), but differs from it by the form of the prosternal lobe, and by the shape of the median lobe of the aedeagus lacking denticulate sides ( Fig. 13 ).

Distribution. China (Gansu, Sichuan).

Biology. Unknown.

Remarks. Agrilus bidentulus was considered conspecific with A. caeruleus by Alexeev (1959) and with A. cyanescens by Hastir & Gaspar (2002). Type examination revealed ( Jendek 2002) that the former is a discrete species.

Figures

FIGURES 1 – 8. Habitus of 1) A. cyanescens, 6.1 mm; 2) A. cyanescens johanidesi, 5.0 mm; 3) A. thibetanus, lectotype 6.8 mm; 4) A. bidentulus, 6.7 mm; 5) A. asahinai, 6.2 mm; 6) A. dali sp. n., paratype, 6.9 mm; 7) A. zhongdian sp. n., paratype, 7.1 mm; 8) A. arsenevi sp. n., holotype, 6.9 mm.

FIGURES 9 – 17. Median lobe of the aedeagus of 9) A. cyanescens from France; 10) A. cyanescens from Russia, Primorsky Kray; 11) A. cyanescens johanidesi; 12) A. thibetanus; 13) A. bidentulus; 14) A. asahinai; 15) A. dali sp. n.; 16) A. zhongdian sp. n.; 17) A. arsenevi sp. n. Scale bar = 1 mm.

FIGURES 18 – 24. Vertex in postero-dorsal aspect of 18) A. cyanescens; 19) A. thibetanus; 20) A. bidentulus; 21) A. asahinai; 22) A. dali sp. n.; 23) A. zhongdian sp. n.; 24) A. arsenevi sp. n.

FIGURES 33 – 41. A. zhongdian sp. n. 33) ventral side, 7.6 mm; 34) aedeagus, 2.2 mm. Metacoxal plates in anteroventral aspect of 35) A. cyanescens; 36) A. thibetanus; 37) A. bidentulus; 38) A. asahinai; 39) A. dali sp. n.; 40) A. zhongdian sp. n.; 41) A. arsenevi sp. n.