Clivina drumonti, Balkenohl, 2021

Balkenohl, Michael, 2021, Belgian Journal of Entomology, Belgian Journal of Entomology 115, pp. 1-83 : 53-55

Clivina drumonti sp. nov.

urn:lsid:zoobank.org:act:CCF4E5A4-C6A9-4D1B-A65A-533AEC41A3C6

( Figs 32 , 53 , 72 , 99 , 116 )

ETYMOLOGY. The species is a patronym in honour of Alain Drumont (RBINS) who helped me in an admirable way to sort out the rich historic material for this contribution and who supports my work already over long years.

TYPE MATERIAL. Holotype: • ♂, with labels and data: white, black printed “ Annam Phuc- Son Nov. Dez. H. Fruhstorfer ” ( RBINS) .

Paratypes: • 5 ♂♂, 3 ♀♀, with labels and data: white, small, black printed “ Annam Phuc Son ” [without further data] ( RBINS) ; • 1 ♂, Phuc Son, Annam XLXII. H. Rolle, Berlin, S.W.11 / Clivina castanea Westw. = parryi Putz. H.E. Andrewes det. ( ETHZ) ; • 1 ♀, Annam Phuc Son Nov. Dez. H. Fruhstorfer ( MFNB) ; • ♂, Annam Phuc-Son Nov. Dez. H. Fruhstorfer ” / Clivina castanea West. Bänninger det. 1934 ( ETHZ) ; • 1 ♂, with labels and data: white, black printed “ Annam Phuc- Son ( ETHZ) ; • 1 ♀, TONKIN Hoa-Binh vii.1939, leg. A. de Cooman ( CADW) .

REMARK. All specimens are brittle-rigid. The holotype is complete. In all the paratypes parts of the appendages are more or less missing.

DIAGNOSIS. Amedium sized species with smooth lateral margin of the pronotum and elytron, and isodiametric reticulation on interval eight of the elytron, and with the lobes of the mentum triangle-like shaped. Distinguished from the other species with these features by the lobe of the mentum with its lateral margin distinctly convex and by the regularly convex lateral margin of the pronotum. Distinguished in addition from all other species by the brown colour.

DESCRIPTION. Measurements. Holotype: Body length 7.73 mm, width 2.31 mm; ratio length/width of pronotum 0.91; ratio length/width of elytra 1.89. Other material: Body length 7.73–9.18 mm (: = 8.53 mm *), width 2.31–2.66 mm (: = 2.52 mm *), ratiolength/width of pronotum 0.9–0.92 (: = 0.92*), ratiolength/widthofelytra 1.86–1.89 (: = 1.88*); (*n = 10).

Colour: Glossy. Testaceous. Antenna and mouthparts fuscous.

Head: Athird narrower than pronotum. Clypeus slightly excised anteriorly; wing prominent, as protruding as clypeus, separated from clypeus by distinct notch; supraantennal plate convex; wing amargined, supraantennal plate reflexed margined. Supraantennal plate extended up to mid-eye level, separated from wing by distinct notch. Clypeus slightly transverse, slightly convex, glossy, separated from frons by a furrow not deep at middle. Frons moderately convex, with slight impression at middle, with blunt lateral carina at posterior eye-level. Clypeus and frons smooth, separated from wing and supraantennal plate by deep moderately wide furrow continuing posteriorly as wide supraorbital furrow with two supraorbital setigerous punctures at posterior eye level. Neck constriction developed as small step, with row of small punctures. Eye hemispherical projecting. Gena covering eye by slightly less than a quarter in ventral view. Antenna just not reaching posterior seta of pronotum, slightly flattened, antennomeres four to ten oblongo-elongate (ratio L/W around 2.07). Labrum obtuse angled anteriorly, with isodiametric reticulation, seven setose. Mentum ( Fig. 53 ) with distinct longitudinal reticulated surface, with lobe concavely hollowed out, shape of lobe like a conspicuously askew trapezium, with distinctly convex lateral margins, with slightly concave anterior margin and with lateral anterior angle rounded off, carinate laterally and anteriorly, with medial angle obtuse, with moderately long carina at middle, median tooth wide, distinctly less protruding anteriorly as lobe, slightly convex anteriorly.

Pronotum ( Fig. 72 ): Disk moderately convex in lateral and frontal view. Somewhat wider than long, outline semi-square. Reflexed lateral margin smooth, regularly convex, widest behind middle; anterior angle obtuse, not projecting; posterior angle marked by distinct sharp tooth, tooth slightly protruding laterally and directed anteriorly. Lateral channel narrow, smooth. Median line narrow, line-like; anterior transverse line wider, rugose, joining median line, just joining basal constriction. Surface smooth, with few transverse wrinkles, with isodiametric reticulation in basal fifths.

Elytron: Disk slightly convex in anterior third in lateral view, regularly convex in frontal view. Nearly twice as long as wide, slightly dilated in apical half with maximum width behind middle. Reflexed lateral margin smooth. Scutellar striole distinct; setigerous tubercle at base of first stria, with distinct tubercle at base of third interval. Striae moderately deep, punctuate-striate, one to three free at base, four to seven joining at humerus, one running up to apex, not joining with seven, two, three and four ending free at apex, five and six joining apically, striae narrow and flat apically. Intervals flattened thought slightly convex, distinctly flattened apically, eights with short carina at humerus and in apical quarter. Third interval with four setigerous punctures, first situated at second stria near base, the other three approaching third stria. Surface of intervals glossy, interval eight with distinct isodiametric reticulation, apically with isodiametric reticulation at the striae.

Hind wings: Fully developed.

Lower surface: Proepisternum covered with distinct isodiametric reticulation, with complete and not deep transverse wrinkles. Terminal sternite of abdomen developed apically as flat moderately wide transverse sulcus.

Legs: Legs covered with longitudinal reticulation. Protibia with three spines of moderate length, slightly sulcate dorsally, movable spur regularly arcuate.

Male genitalia ( Fig. 99 ): Median lobe moderately long, slender, slightly arcuate, nearly straight in apical quarter, apex short, regularly tapered apically, apex slightly asymmetric, ventral rim distinct, base with indistinct apophysis. Endophallus apically with group of minute bristles. Ventral paramere moderately wide, regularly tapered in apical quarter, lateral apophysis medium sized, apex slender, with three long and three small setae at apex. Dorsal paramere moderately slender, at apex with two long and one small seta(e) and one small seta preapically.

Female coxostylus and laterotergite ( Fig. 116 ): Coxostylus medium-sized, convex at beginning of apical third and directly at apex, dorsally with eleven long to medium sized and one distinctly elongated and robust nematiform setae in basal half, ventrally with one medium sized seta and with a limited number of smaller setae, with one minute SSO. Laterotergite with six moderately long setae basally and one isolated seta towards coxostylus.

VARIATION. On the frons of the head the indistinct impression at middle is missing in some specimens. On the pronotum, the lateral margin shows a slight crenulation in two of the paratypes. The proepisternum shows some longitudinal short rugae between the transverse wrinkles in half of the specimens. In some specimens striae five and six of the elytron join more or less distinct at one side.

DISTRIBUTION: Known from North Vietnam.

Figures

Fig. 32. C. drumonti sp. nov., holotype.

Fig. 53. C. drumonti sp. nov., paratype.

Fig. 72. C. drumonti sp. nov., paratype.

Fig. 99. C. drumonti sp. nov., holotype.

Fig. 116. C. drumonti sp. nov., paratype.