Geotragus rugosus, Ren, Li, Alonso-Zarazaga, Miguel A. & Zhang, Runzhi, 2013

Ren, Li, Alonso-Zarazaga, Miguel A. & Zhang, Runzhi, 2013, Revision of the Chinese Geotragus Schoenherr with description of three new species (Coleoptera: Curculionidae: Entiminae), Zootaxa 3619 (2), pp. 161-182 : 173-176

Geotragus rugosus sp. nov.

( Fig. 6 , 7 )

Diagnosis. This species can be easily distinguished from other species by the following characters: dorsal part of rostrum strongly corrugated, with a deep wide central furrow and many subparallel furrows; preocular area with a wide, deep and oblique impression laterally on each side of rostrum.

Description. Holotype-male. Measurements (in mm): Standard length: 6.50; pronotal length: 2.20; pronotal width: 2.05; elytral length: 4.80; elytral width: 2.60; rostral length: 1.04; rostral width: 0.80.

Habitus and color ( Fig. 6 A, 6B): Body slender; integument reddish brown, only head and sides of elytra dark red, antennae and legs pale reddish brown; with coppery metallic green to yellowish brown scales, scales moderately dense, tessellate, contiguous but not overlapping; scales on dorsal and lateral surfaces of rostrum sparse, oval; posterior half of antennal scrobes glabrous; pronotum with round scales, moderately dense; scales on elytra round, moderately dense; scales on ventrites dense, round to elongate-oval from ventrites 1–5, ventrite 5 with lanceolate scales; legs densely covered by scales; body with recumbent to subrecumbent sparse and slightly thick setae; rostrum covered with recumbent to subrecumbent fine setae; setae of antennal scape and desmomeres 1–7 long, fine and sparse; setae of interstriae lanceolate, sparse and subrecumbent; setae on ventral surface thick and sparse; setae of tibiae long and moderately dense, femora with subrecumbent lanceolate setae.

Head ( Fig. 6 C): Moderately flat, dorsal part with many longitudinal sulci, corrugated, punctures small and dense; eyes strongly convex, with a deep circumocular sulcus; frons moderately flat, not higher than dorsal part of rostrum in lateral view.

Rostrum ( Fig. 6 C): In dorsal view, 1.3× length of wide; apex narrower than base; base wider than frons; dorsal surface depressed in median area of rostrum, corrugated, with a wide and deep median sulcus, extending from antennal insertion to vertex, along the median sulcus, with many subparallel longitudinal sulci, short and deep; epistome broad, posterior angle of epistome between 45° and 90°, with carina distinct; mandible scars quadrate to rectangular; in dorsal view ventral margin of scrobes visible from apex to middle of rostrum; in lateral view, with a deep and wide groove positioned laterally between eyes and antennal scrobes, perpendicular to antennal scrobes, close to ventral margin of rostrum accompanied by subparallel deep and wide sulcus.

Antennae: Scape slender, reaching middle of eyes, 0.82× length of funicle; desmomere 1 1.24× length of 2, both segments elongate clavate, desmomere 1 apical rather stout, strongly narrowed toward base; desmomere 3 as long as 4, both segments elongate moniliform, 0.67× length of desmomere 2; desmomere 5 as long as 6, both segments moniliform and 0.93× length of desmomere 4; desmomere 7 much wider than and 1.15× length of 6, moniliform; pubescence of funicle similar throughout; club segment 1 1.6× length of 2, segment 2 0.6× length of 3; segment 3 with a marked annulus beyond middle.

Pronotum: 1.07× as long as wide, elongate; anterior and posterior margin truncate; disc with a fine, shallow, incomplete median longitudinal groove; posterior margin distinct carinate, linear; dorsal surface of pronotum with slightly dense, large and round granules, space between granules moderately convex, each granule with one recumbent lanceolate seta on top; postocular vibrissae long.

Scutellum: Large , reddish black, apex broadly V-shaped.

Elytra: Base truncate; in lateral view moderately convex; in dorsal view, lateral margins clearly diverging from base to basal 1/5, then subparallel, reaching its greatest width nearly at declivity, thence clearly converging towards the apex, apex blunt, W-shaped; odd interstriae slightly more raised than even ones; interstria 1 moderately raised along basal 1/8, forming a longitudinal crest, not raised at declivity, top of declivity normally rounded in lateral view; interstria 3 much wider than remaining interstriae, distinctly raised and expanded at basal 1/4, forming a elongate crest, slightly raised and forming 1–3 round tubercles just before declivity; interstria 5 raised after basal 1/ 8 and forming a row of several small tubercles, more strongly raised at declivity, forming a cone-like tubercle; interstriae 3 and 9 coalescing, raised at declivity forming a V-shaped tubercle on each elytron.

Abdomen ( Fig. 7 A): Surface of ventrite 1 depressed at middle and convex on lateral areas; suture I bisinuate; ventrite 2 moderately convex medially, with apical transverse impression; mesal length of ventrite 1 1.4× length of 2, ventrite 2 1.1× length of 3 and 4 combined; ventrite 5 convex, widely parabolic.

Metendosternite ( Fig. 7 B): Stalk 0.4× length of furcal arms, trapezoidal and slightly transverse, anterior part of longitudinal flange very short, only 1/5 as long as posterior; hemiductus weak, not very clear, wide and truncate; anterior tendons positioned almost in the middle of furcal arms, opposite to hemiductus; furcal arms strong, apically slightly bifurcate, diverging at nearly 60° in relation to longitudinal flange, with an oblique keel near basal part of each furcal arm.

Legs: Protibiae bent inwards at apical 1/4, inner margin not bisinuate, almost straight, outer margin slightly arcuate inwards; inner margin of protibiae distinctly with 11 sharp and large teeth, each tooth with a spiniform seta just behind it; teeth of meso- and metatibiae sparse and much smaller than protibiae; protibial mucro moderately large, distinct, not covered by setae; tarsi slender; tarsomere 1 much longer and wider than 2.

Male genitalia and terminalia: Sternite VIII ( Fig. 7 C) divided into two hemisternites, transversely oriented, crescent shape; each hemisternite laterally acuminate, anterior margin widely roundly emarginate, posterior margin arc shaped; membrane between sternite VIII and IX with two very small, dot-like sclerotizations. Sternite IX ( Fig. 7 C) with basal plate bilobed, each lobe semi-trapezoidal; spiculum gastrale 0.68× length of penis, more sclerotized at middle, basal 1/2 almost straight, slightly curved anteriorly. Penis ( Fig. 7 D, 7E) in dorsal view 2.74 mm in length, ca. 4.5× length of wide, temones 1.37 mm long; lateral margins subparallel at middle, slightly expanded at ostium level, thereafter converging straight but asymmetry, apex obliquely truncated; in lateral view strongly curved, after ostium strongly constricted toward apex, almost flat at apex. Tegmen ( Fig. 7 F) 0.53× length of penis, with ring narrow, parameroid lobes developed, narrowly spaced at base, basal half more sclerotized area triangular; tegminal apodeme slender, forming a Y-shape with basal piece, distal end of apodeme not expanded, rounded.

Variation. Male paratypes. Measurements (in mm): Standard length: 6.20–7.20; pronotal length: 1.90–2.45; pronotal width: 1.80–2.40; elytral length: 4.20–5.50; elytral width: 2.50–3.00; rostral length: 1.00–1.22; rostral width: 0.80–1.10. Inner margin of protibiae distinctly with 11–14 sharp and large teeth. Among examined specimens, there is one male with a darker penis and with the apical margin of the ostium rounded.

Female paratypes. Measurements (in mm): Standard length: 7.40–7.80; pronotal length: 2.00–2.10; pronotal width: 2.30–2.40; elytral length: 4.90–5.80; elytral width: 3.50–3.60; rostral length: 1.20–1.23; rostral width: 1.11–1.13. Elytra much wider than male, pronotum transverse, ventrite 5 ( Fig. 7 G) parabolic, slightly shorter than ventrite 2. Sternite VIII ( Fig. 7 H) with spiculum ventrale “baseball bat” shape and slightly curved; lamina tightly folded, in lateral view triangular, ventral margin angulated at midpoint, strongly sclerotized. Ovipositor ( Fig. 7 H, 7I) with coxites shorter than sternite VIII, cone-like, lateral margins strongly sclerotized, posteriorly slightly narrowed with rounded apex; styli relatively small, cylindrical, with 2–3 long setae, more sclerotized than coxites. Bursal sclerites ( Fig. 7 J) near the point of union of spermathecal duct and of oviduct, facing each other at middle, each sclerite in lateral view T-shaped with margins curved, dorsal surface of mesal area with many sharp spines. Spermatheca ( Fig. 7 K) with corpus nearly rounded; cornu slightly elongate, strongly curved as broad V-shaped, apically gradually narrowed with apex rounded; nodulus prominent, curved tube-like, subcontiguous with and strongly angled at about 20° in relation to ramus; ramus trapezoid, prominent with truncate apex.

Material examined. Holotype: 3: (white, printed): CHINA, Yunnan Provin. / Gongshan, Cikai town / Dabadi, riverside. / N27°47’48”, E98°30’21”; 3000m, 2002.9.30, day / LIANG Hongbin. / Sino-American Exped. / Institute Zoology, CAS; (red, printed): HOLOTYPE; (white, printed): IOZ(E) 905051. Paratypes (43, 5Ƥ): 1Ƥ: same data as holotype except PARATYPE printed on yellow paper and IOZ(E) 905053. 13: with same locality and elevation as holotype except collecting date 2002.9.27 night, light, PARATYPE printed on yellow paper and IOZ(E) 905052. 33: (white, printed): CHINA, Yunnan Provin., / Gongshan, Dulongjiang, / Maku. Wood, vegetation / 27.68875°N, 98.31303°E; 1677m, 2006.9.3 day / Liu Ye collector / California Academy & / IOZ., Chinese. Acad. Sci.; (yellow, printed): PARATYPE; (white, printed): IOZ(E) 1798744, IOZ(E) 1798745, IOZ(E) 1798747. 2Ƥ: ditto, IOZ(E) 1798746, IOZ(E) 1798748. 2Ƥ: (white, printed): [Yúnnán Gòngshān Dúlóngjiāng Xiāng] /! "# [Mǐlǐwáng Lùbiān Wǎnshàng] / 2004. X.31 $%& [Liáng Hóngbīn] / [ Zhōngguó Kēxuéyuàn]; 1956m / '([Wĕidù] 27.72383 /)([Jīngdù] 98.36117 /

[ Zhōngguó Kēxuéyuàn]; (yellow, printed): PARATYPE; (white, printed): IOZ(E) 905050, IOZ(E) 905054.

Holotype and all paratypes are to be conserved in IZCAS.

Distribution. China: Yunnan (Gongshan). Altitudinal range of this species is from 1677m to 3000m high. Etymology. The specific epithet is referring to the strongly corrugated dorsal part of the rostrum.

Figures

FIGURE 6. Habitus of Geotragus rugosus sp. nov., male, holotype: A dorsal view B lateral view C head, dorsal view. Scales: 1 mm.

FIGURE 7. Geotragus rugosus sp. nov.: A male ventrites, ventral view B male metendosternite, dorsal view C male sternite VIII and IX, dorsal view D penis, dorsal view E penis, lateral view F tegmen, dorsal view G female ventrites, ventral view H sternite VIII and female genitalia, lateral view I coxites and styli, dorsal view J bursal sclerites, dorsal view K spermatheca, lateral view. Scales: 0.5 mm.