Euhemicera amicorum, Ando & Ruzzier, 2017

Ando, Kiyoshi & Ruzzier, Enrico, 2017, A new species of the genus Euhemicera (Tenebrionidae: Cnodalonini) from South East Asia, with an updated catalogue of all known species, Zootaxa 4344 (1), pp. 195-200 : 196-198

Euhemicera amicorum sp. n.

Type material. Holotype: male, Laos, Luang, Namtha Province, Muang Long city, Ban Chakhankham , VII-2012, S. Khamphilavong leg ( BMNH) . Paratypes: 2 males, 1 female, Laos, Mt. Phou Pan, Ban Saleui, Xam Neua , Houa Phan Prov. , 27.IV.–11.V. 2007, J. Yamasako leg. ( KAPC) ; 2 males, 1 female, Laos, Ban Ôm, SE Phonsavang 48 km, Xieng Khouang Prov., 2.VI.2007, J. Yamasako leg. ( KAPC) ; 1 male, Myanmar: Banmauk , Sagaing Province, 16–25. VI.2011, Native collector leg . ( KAPC); 1 female, Myanmar: Madalay, Prov. Kyaukpadang, 6–28.VI-2009, Native collector leg . (KAPC); 2 males, 4 females, Laos: Houaphanh province, Bam Saleui , 15–17. vii. 2013, X. Gouverneur leg. ( ERPC) .

Description. Measurements. Body length: 9.5–14.7 mm, Holotype 14.7 mm. male, (n = 6): IE/TD = 1.5–1.8, Holotype 1.8; PW/PL = 1.60–1.7, Holotype 1.7; EL/EW = 1.4–1.6, Holotype 1.5; Female, (n= 3): IE/TD = 1.5–1.7; PL/ PW = 1.6–1.7; EL/EW = 1.4–1.5.

Oblong, distinctly convex above, shiny. Colour dark reddish brown or distinct reddish purple in some paratypes; dorsal side with metallic reflection; head and pronotum aeneous; elytra dark green with intervals aeneous in each median portion; mouthparts light reddish brown, antennae infuscate in the last six antennomeres; legs with metallic sheen ( Fig. 1 ).

Head transverse, coarsely and densely punctate; punctures separated from each other by a distance corresponding to twice their diameter. Anterior part of the head short, slightly convex and feebly emarginate at apex; fronto-clypeal suture finely impressed; genae wider than long, distinctly raised anteriorly; frons broad, moderately convex and gently sloping forwards; eyes narrow and transverse in dorsal view, strongly produced laterally; inner ocular sulci shallow, broad and distinct. Antennae robust, reaching basal angle of pronotum; antennal club constituted of the six distal antennomeres, all densely covered of sensory pores. Last palpomere slightly securiform. Mentum linguiform, sparsely pubescent and bearing few long setae.

Pronotum trapezoidal, widest at the base; disc slightly convex, gently sloping laterally, distinctly sulcate along lateral margins; pronotal disc finely and densely punctate; punctures smaller than those on head and separated from each other by a distance corresponding to three times their diameter; anterior margin of the pronotum slightly emarginate, moderately bordered except for median fourth; lateral margins of the pronotum distinctly bordered, almost straight anteriorly and slightly sinuate before the pronotum base; apical angles of the pronotum obtuse, rounded; basal angles acute, feebly produced laterally. Scutellum slightly convex, impunctate.

Elytra oblong, having the widest part at apical third; striae deep and tenuous, shallow apically; eighth striae rudimental anteriorly, partially interrupted; strial punctures minute and sparse, generally smaller than the corresponding striae; punctures separated from each other by a distance corresponding to three times to four times their diameter. Elytral intervals flat, microscopically punctate; humeral calli oblong, distinctly humped; elytral epipleura evenly depressed, microsculptured and impunctate.

Prothoracic hypomera flattened along lateral margins, densely microsculptured and rugulose, almost impunctate. Prosternum strongly raised, slightly bordered at apex; prosternal process subfusiform, depressed, bordered at sides and pointed at apex, bearing sparse setigerous punctures. Mesosternum roughened, with longitudinal median carina; Vshaped ridge slightly descendent anteriorly with anterior angles obtusely angulate in lateral view. Anterior part of the mesosternum densely covered of long hairs. Metasternum distinctly convex, roundly depressed at the middle, densely punctate and pubescent in the depressed area and feebly punctate along lateral margins.

Abdomen feebly convex along the middle, finely rugulose; three basal ventrites feebly and sparsely punctate and apical two ventrites densely punctate.

Aedeagus gently curved in lateral view; parameres microscopically punctate, with a pair of hooks at apices ( Fig. 2 ). Anterior margins of profemora finely pubescent basally; posterior margins of meso- and metafemorae each with a transverse patch of dense hairs; meso- and metatibiae slender in basal three-fifths and tumid in the rest; inner margin of meso - metatibiae strongly curved between basal fifth and apical two-fifths, densely pubescent in apical portion after the curvature.

Female. Mesosternum flattened in the middle, not pubescent; meso- and metafemora not pubescent on posterior margins, meso- and metatibiae simple with inner margins neither tumid nor strongly curved.

Etymology. amicorum ” gen. plur. of the latin word “ amicus ” = friend

The author are pleased to name this species after Junsuke Yamasako and Xavier Gouverneur, both Cerambycidae specialists and collectors of the major part of the type series.

Diagnosis. Euhemicera amicorum sp. n. resembles E. gebieni (Kaszab, 1941) (type loc. Taiwan) due to general body shape, integuments colour, smooth elytra and sexual dimorphism, but it can be distinguished due to the more pronounced curvature of meso- and metatibiae, produced anterior angles of pronotum, almost straight lateral margins of pronotum (gently rounded in E. gebieni ), distinctly striate elytral intervals (punctato-striate in E. gebieni ) and minute and sparse strial punctures (markedly punctate in E. gebieni ), most of which are narrower than the width of corresponding striae. The new species present also a vague similarity with Euhemicera satoi Ando, 2003 , from Vietnam, due to smooth and distinctly striate elytra but the males of the latter species has straight tibiae.

Figures

FIGURE 1. Euhemicera amicorum n. sp., Holotype, male, dorsal and lateral view.

FIGURE 2. Euhemicera amicorum n. sp., Holotype, aedeagus, dorsal and lateral view.