Geotragus tuberculatus Chen, 1990

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: 164-167

publication ID

http://dx.doi.org/10.11646/zootaxa.3619.2.5

publication LSID

lsid:zoobank.org:pub:DBB8DB78-09DF-4F68-AFB1-AAC8EBC95DD

persistent identifier

http://treatment.plazi.org/id/C62C2621-100F-C04A-FF10-FDD2FE316CB1

treatment provided by

Plazi

scientific name

Geotragus tuberculatus Chen, 1990
status

 

Geotragus tuberculatus Chen, 1990 

( Fig. 1View FIGURE 1, 2View FIGURE 2)

Geotragus tuberculatus Chen, 1990  . Sinozoologia, 7: 149–150, fig. 1.

Diagnosis. Elytra with interstria 3 with a row of three prominent tubercles before declivity; interstria 6 raised and forming a row of 3–4 rounded tubercles before declivity.

Redescription. Holotype-male. Measurements (in mm): Standard length: 5.80; pronotal length: 1.70; pronotal width: 1.75; elytral length: 4.15; elytral width: 2.50; rostral length: 1.05; rostral width: 0.70.

Habitus and color ( Fig. 1View FIGURE 1 A, 1 B): Body slender; color dark brown, antennae and legs reddish brown; with coppery metallic pearl white, pale brown to dark brown scales, scales moderately dense, tessellate, contiguous but not overlapping; scales on dorsal and lateral surfaces of rostrum moderately dense, elongate oval; scales behind epistome round and small, clearly different from others; posterior half of antennal scrobes glabrous; pronotum with polygonal scales, moderately dense, contiguous, some scales imbricate, with a longitudinal stripe of lighter scales on each side of dorsum; scales on elytra polygonal, dense, but not contiguous; scales on ventrites moderately dense, round to elongate-oval; scales on legs dense; with short, curved, recumbent to subrecumbent setae, sparsely distributed; rostrum covered with recumbent thick setae; setae of antennal scape and desmomeres 1–7 long, fine and sparse; disc and lateral surface of pronotum with sparse, recumbent setae; setae of interstriae lanceolate, curved, sparse and subrecumbent; setae on ventral surface moderately thick, long, recumbent and dense; setae of tibiae long and moderately dense, femora with recumbent lanceolate setae.

Head ( Fig. 1View FIGURE 1 C): Moderately convex, dorsal surface corrugated, with many longitudinal fine and shallow sulci, and small and dense punctures; eyes strongly convex, with a deep and fine circumocular sulcus; frons slightly depressed, not elevated regarding to dorsal surface of rostrum in lateral view.

Rostrum ( Fig. 1View FIGURE 1 C): In dorsal view, 1.50 × length of wide, apex narrower than base; base slightly narrower than frons; dorsal surface flat in median area of rostrum, punctured, with a narrow and deep median sulcus, extending longitudinally from antennal insertion to the vertex; posterior angle of epistome between 45 ° and 90 °, with carina distinct and blunt; mandible scars round to rectangular; in dorsal view ventral margin of scrobes visible from apex to middle of rostrum; in lateral view, with a shallow triangular depression positioned laterally between eyes and antennal scrobes, close to ventral margin of rostrum, accompanied by subparallel deep sulcus.

Antennae: Scape slender, reaching middle of eyes at rest, 0.93 × length of funicle; desmomere 1 1.32 × length of 2, both segments elongate clavate; desmomere 3 short, clavate, 0.74 × length of 2; desmomeres 4–6 moniliform, 4 0.93 × length of 3, 5 0.93 × length of 4; desmomeres 5 and 6 equal in length; desmomere 7 1.33 × length of and wider than 6, elongate moniliform; pubescence of funicle similar throughout; club segment 1 1.13 × length of 2, segment 2 0.73 × length of segment 3; segment 3 with a marked annulus beyond middle.

Pronotum: 0.97 × as long as wide, subquadrate; anterior margin truncate, posterior margin mesally slightly produced; disc with a fine, shallow, incomplete median longitudinal groove, slightly flattened on both sides of median groove; posterior margin not carinate; dorsal surface of pronotum with dense, large, and round granules, each granule with one recumbent lanceolate seta on top; postocular vibrissae blond, long.

Scutellum: Small  , reddish brown, apex broadly V-shaped.

Elytra: Base slightly emarginated; in lateral view moderately convex; in dorsal view, lateral margins clearly diverging from base to basal 1 / 4, then subparallel and slightly curved, reaching its greatest width at mid length, thence clearly converging towards the apex, apex widely rounded; interstriae tuberculate; interstria 1 moderately raised along basal 1 / 8, forming a longitudinal crest, raised at declivity forming a prominent longitudinal crest, apically rounded in lateral view; interstriae 3 distinctly raised and forming three consecutive conical tubercles before declivity; interstria 4 raised and forming a row of 2–3 small round tubercles before declivity; interstria 5 raised behind basal 1 / 8 and forming a row of 2–3 elongate tubercles before declivity, and a strongly protruding conical tubercle at declivity; interstria 6 raised and forming a row of 3–4 rounded tubercles before declivity; interstria 7 raised and forming 2–3 small elongate tubercles before declivity; interstriae 3 and 9 apically coalescent, raised at declivity forming a triangular tubercle.

Abdomen ( Fig. 2View FIGURE 2 A): Surface of ventrite 1 depressed at middle, slightly convex at sides; suture I strongly bisinuate; surface of ventrite 2 moderately convex, without apical transverse impression; mesal length of ventrite 1 1.28 × length of 2, 2 1.09 × length of 3 and 4 combined; ventrite 5 parabolic, with convex surface.

Metendosternite ( Fig. 2View FIGURE 2 B): Stalk 0.36 × length of furcal arms, trapezoidal and transverse, anterior part of longitudinal flange slightly shorter than posterior; hemiductus wide, truncate, positioned at apical half of furcal arms but near the midpoint; anterior tendons weak, positioned almost in the middle of furcal arms, opposite to hemiductus; furcal arms thin, apically clearly bifurcate, diverging at nearly 60 ° in relation to longitudinal flange.

Legs: Protibiae sinuate, bent inwards at apical 1 / 4; inner margin of protibiae with eight sharp and large teeth, each tooth with a spiniform seta just behind it; teeth of meso- and metatibiae sparse and much smaller than those of the protibiae; protibial mucro moderately large, distinct, not covered by setae; tarsi long and broad; tarsomere 1 almost 2 × length of tarsomere 2.

Male genitalia and terminalia: Sternite VIII ( Fig. 2View FIGURE 2 C) divided into two hemisternites, transversely oriented, subtriangular; each hemisternite laterally acuminate, anterior margin widely roundly emarginate, posterior margin strongly angulate; membrane between sternite VIII and IX with two very small, dot-like sclerotizations. Sternite IX ( Fig. 2View FIGURE 2 C) with basal plate bilobed, each lobe semi-trapezoidal; spiculum gastrale 0.77 × length of penis, apodeme slender, almost straight, slightly curved anteriorly. Penis ( Fig. 2View FIGURE 2 D, 2 E) in dorsal view with tube 2.63 mm in length, ca. 6.9 × length of wide, temones 0.88 mm long; lateral margins subparallel at middle, diverging at ostium level, thereafter roundly converging, apex ogival; in lateral view curved, more strongly so near base and at apex, greatest width at midpoint. Tegmen ( Fig. 2View FIGURE 2 F) 0.38 × length of penis, with ring narrow, parameroid lobes developed with basal half more sclerotized; tegminal apodeme slender, forming a Y-shape with basal piece; apex of apodeme slightly expanded to form a round plate.

Variation. Male paratypes. Measurements (in mm): Standard length: 5.60–6.10; pronotal length: 1.55–1.75; pronotal width: 1.65–1.95; elytral length: 4.05–4.20; elytral width: 1.60–2.60; rostral length: 1.05–1.13; rostral width: 0.70–0.80.

Female paratype. Measurements (in mm): Standard length: 6.80; pronotal length: 1.75; pronotal width: 2.05; elytral length: 5.30; elytral width: 3.50; rostral length: 1.05; rostral width: 0.88. Elytra 1.35–2.19 × length of male, pronotum 0.85 × length of male, ventrite 5 ( Fig. 2View FIGURE 2 G) parabolic, longer than ventrite 2. Sternite VIII ( Fig. 2View FIGURE 2 H) with spiculum ventrale thin, rod-like and sinuate; lamina tightly folded, in lateral view triangular, ventral margin angulated close to speculum ventral, strongly sclerotized. Ovipositor ( Fig. 2View FIGURE 2 H, 2 I) with coxites similar in length to sternite VIII, folded along middle, lateral margins strongly sclerotized, posteriorly slightly narrowed; styli relatively small, cylindrical, apically inserted two long setae. Bursal sclerites ( Fig. 2View FIGURE 2 J) near the point of union of spermathecal duct and of oviduct, facing each other at middle, each sclerite in lateral view chevron-shaped, with both arms curved, dorsal surface of mesal area with several spines. Spermatheca ( Fig. 2View FIGURE 2 K) with corpus subquadrate; cornu elongate, widely curved, U-shaped, apically gradually narrowed, apex narrowly rounded; nodulus prominent, subcontiguous with and angled almost 90 ° in relation to ramus; ramus trapezoid, prominent and moderately long.

Material examined. Types: 13: (white): [Yúnnán, printed], [Lúshuǐ, handwritten] / [Yáojiāpíng, handwritten], 2800m [handwritten] / [ Zhōngguó Kēxuéyuàn, printed]; (white): 1981. VI. 6 [handwritten] / [Cǎijízhĕ, Wáng Shūyǒng, printed]; (red, printed): HOLOTYPE; (white, printed): IOZ(E) 905001. 1 Ƥ: same data as holotype except ALLOTYPE printed on sea-green paper and IOZ(E) 905002. 13: same data as holotype except PARATYPE printed on yellow paper and IOZ(E) 905005. 13: with same locality as holotype except 2500m, collecting date 1981. V. 24, PARATYPE printed on yellow paper and IOZ(E) 905004. 13: (white): [Yúnnán, printed], [Lúshuǐ, handwritten] / [Piànmǎ, handwritten], 2300m [handwritten] / [ Zhōngguó Kēxuéyuàn, printed]; (white): 1981. V. 31 [handwritten] /

[Cǎijízhĕ, Wáng Shūyǒng, printed]; (yellow, printed): PARATYPE; (white, printed): IOZ(E) 905003. Other materials: 13: CHINA, Yunnan Prov. / Fugong, Maji Town / Majimi, plant beating / 27.40301 °N, 98.82446 °E; 1505m, 2005.8. 26 day / Liang H.B, Zhang J.F. / Califormia Academy & / IOZ., Chinese. Acad. Sci. / IOZ(E) 1798751.

Holotype and all paratypes conserved in IZCAS.

Distribution. China: Yunnan (Fugong, Lushui). Altitudinal range of this species is from 1505–2800m. Fugong is a new locality record.

IZCAS

Institute of Zoology, Chinese Academy of Sciences

Kingdom

Animalia

Phylum

Arthropoda

Class

Insecta

Order

Coleoptera

Family

Curculionidae

Genus

Geotragus

Loc

Geotragus tuberculatus Chen, 1990

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

Geotragus tuberculatus

Chen 1990
1990