Agrilus arsenevi Jendek

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 : 55-56

Agrilus arsenevi Jendek sp. n.

( Figs. 8 , 17 , 24 , 32, 41)

Type specimens. Holotype 3, ( EJCB): “SU, Ussuri reg., Jasnoe, 12–19.vii.1989, R.Červenka leg”. Paratypes: 1 3 ( EJCB): “SU, Ussuri reg., Jasnoe, 500 m, 12–19.vii.1989, M. Nikodým leg”.

Type locality: “SU, Ussuri region, Jasnoe [= Yasnoe, 43°40'N, 134°00'E (precised by collector)]”.

Description of the holotype. Body medium-sized, robust, blue, with silky lustrous, without distinct pubescence. Head large; frons and vertex moderately convex with distinct median longitudinal impression ( Fig. 24 ), vertex distinctly spirally rugoso-granulate. Pronotum widest in middle, anterior lobe absent, sides evenly arcuate, posterior angles obtuse. Disc flat, with large, weak, lateral impressions; prehumerus missing. Marginal and submarginal carinae slightly convergent, submarginal carina obsolete at both ends. Scutellum with obsolete transverse carina. Elytral apices widely separately arcuate. Prosternal lobe (Fig. 32) robust, markedly protrusive outward, deeply, arcuately emarginate with sharply pointed sides; prosternal process (Fig. 32) narrow, with blunt angles, subparallel between coxae, flat on disc; metacoxae sharply protruding outward (antero-ventral view) ( Fig. 41 ); basal ventrite distinctly impressed between metacoxae. Aedeagus with median lobe sharply pointed at apex, and with obviously dentate sides ( Fig. 17 ). Metatarsi distinctly shorter than metatibiae; tarsomere 1 subequal in length to following two tarsomeres combined.

Sexual dimorphism. Not assessed.

Variability. No appreciable variability was observed, except in body length.

Measurements. Holotype: 6.9 mm, Paratype 6.6 mm.

Differential diagnosis. Agrilus arsenevi Jendek sp. n. resembles by the color and by the body form specimens of A. cyanescens , A. bidentulus or A. asahinai , but it can be distinguished mainly by the peculiar form of the median lobe of the aedeagus ( Fig. 17 ). In addition, it differs from A. cyanescens by the granulate sculpture of the frons and pronotum, and from A. bidentulus and A. asahinai by having the prosternal lobe deeply arcuately emarginate.

Etymology. The specific epithet is a patronymic, in honour of Vladimir Klavdievich Arsenev, 1872–1930, an early explorer and topographer of the Sikhote-Alin mountain range where this new species has been discovered.

Distribution. Russia (Primorsky Kray).

Biology. Unknown.

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.