Curculio jilinensis Pelsue and Zhang

Frank W. Pelsue, Jr. & Zhang, Runzhi, 2000, A Review Of The Curculio From China With Descriptions Of New Taxa. Part II. The Curculio Alboscutellatus Group (Curculionidae: Curculioninae: Cyrculionini), The Coleopterists Bulletin 54 (4), pp. 467-496 : 476-479

Curculio jilinensis Pelsue and Zhang , New Species

Figs. 1–2 , 33–36

HOLOTYPE. China. Jilin: male [China/Jilin/ Hunchun / Y. Zhang] ( IZAS)

PARATYPE. (3) China. Jilin: 2 males, 1 female [China/Jilin/ Hunchun / Y. Zhang] ( FWPC)

Recognition Characters. Elongate oval; derm fuscorufous dorsally on thorax and elytra, piceous laterally and ventrally; frons, 0.24 as wide as head across eyes; rostrum, 0.56 as long as body; scutellum broader than long, clothed with dirty white, scales; femoral teeth small; pro­ and mesouncus small, metauncus lacking; antennal scape as long as funicle, club as long as segments 4–7.

Description. Male: Length: 3.3–3.8 mm (mean = 3.57) Width: 1.9 mm. Head: Smallsized, moderately convex; punctures small, clothed with small, narrow, elongate, dirty white scales; eyes large, oval, flat and finely faceted; frons moderately broad, 0.24 as wide as head across eyes; sparsely clothed with larger, narrow, elongate, dirty white scales; interocular fovea lacking. Rostrum: Length: 2.0– 2.1 mm (mean = 2.07) 0.56 as long as body; cylindrical, thick at base gradually tapering to apex; margins subparallel to antennal insertion, then gradually tapering to apex; almost straight in lateral view to antennal insertion, then gradually curving to apex; short dorsal carina from frons to smooth dorsal aspect, color from carina to apex, testaceous dorsally, piceous laterally to antennal insertion, then testaceous to apex; two dorsolateral carinae from frons to antennal insertion with oval punctures along and between carinae; scrobe lateral; scape inserted in apical half. Antennae: Length: Scape 1.05 mm. Funiculus: segment one 0.3 mm, two 0.25 mm, three 0.15 mm, four 0.125 mm, five 0.125 mm, six 0.125 mm, seven 0.125 mm, club 0.5 mm. Funicle 1.1 mm; scape as long as funicle; scape and funicle rubiginous, sparsely clothed with elongate, narrow, erect, dirty white scales; club as long as segments 4–7; club elongate­oval, with short, dense, fine pile. Thorax: Length: 1.0 mm. Width: 1.3–1.5 mm (mean = 1.37). Dorsally base 0.79 as wide as elytra, lateral margins broadly rounded, tapering abruptly to constriction; disc with punctures small, shallow, separated by narrow ridge, narrow, elongate, dirty, white scales, with bifid and truncated apices, base sinuate with indication of basal carina; mesosternal intercoxal process feeble with narrow, elongate, white scales; scutellum broader than long, bifid, clothed with dirty white scales; mesepimeron, mesepisternum, and metepisternum clothed with clavate, dirty white scales, with truncate apices; procoxae clothed with white scales. Elytra: Length: 2.0– 2.4 mm (mean = 2.24). Striae rather deep, with prominent punctures; humeri feebly prominent, rounded; intervals, broad, flat, with narrow, elongate, white scales mixed with testaceous scales, with no defined macula; crosshatched setae lacking. Legs: Length hind femur: 1.5–1.7 mm (mean = 1.64) tooth small, acute; derm basally and apically fuscopiceous, club fuscorufous; pro­ and mesofemur with very small tooth; hind femur with proximolateral sulcus from trochanter to base of club; clothed with narrow, elongate, white scales; tibiae somewhat sinuate; pro­ and mesouncus small, metauncus lacking. Abdomen: Sternite 1 as long as 2 behind coxal cavities; sternite 1 and 2 with broad median declivity; sternite 2 ascending to 3; sternites 3 and 4 combined longer than 5; all sternites evenly clothed with narrow, elongate, white scales; sternite 5 with emarginate apex and 2 tufts of white seta­like scales at apex. Pygidium: Small , clothed with elongate, white seta­like scales. Genitalia: Median lobe of aedeagus 1.2 mm in length, 0.35 mm in width, narrower at base, slightly widening toward bend, sides narrow, apex arcing down gradually to blunt rounded point, slightly asymmetrical, laterally thickened; apodeme 1.4 mm in length ( Figs. 33–35 ).

Female: Length: 3.8 mm. Width: 1.9 mm. Rostrum: Length 2.3 mm, scape inserted at midpoint. Antennae: Length: Scape 0.7 mm. Thorax: Length: 1.0 mm. Width: 1.4 mm. Elytra: Length: 2.4 mm. Legs: Length of hind femur 1.8 mm. Genitalia: Spermatheca ramus and collum undifferentiated; cornu broadly thickened, curved to tapered blunt apex ( Fig. 36 ).

Distribution. China: Jilin Province, Hunchun, Y. Zhang.

Remarks. This species resembles Curculio fluvipennis Morimoto (examined in BMNH collection by senior author) by having a piceous venter, but has a fuscorufous prothorax, elytra, with proximolateral sulcus on the hind femur. Curculio fluvipennis has piceous prothorax, venter, fuscorufous elytra and lacks the proximolateral sulcus on hind femur.

Figures

Figs. 1–6. 1–2) Curculio jilinensis male, dorsal and lateral habitus, holotype; 3–4) C. gressitti male, dorsal and lateral habitus, holotype; 5–6) C. tonkinensis male, dorsal and lateral habitus.

Figs. 33–46. Curculio jilinensis 33) median lobe, dorsal aspect; 34) median lobe, lateral aspect; 35) median lobe, apex; 36) spermatheca, lateral aspect; Figs. 37–39. C. gressitti 37) median lobe, dorsal aspect; 38) median lobe, lateral aspect; 39) median lobe, apex. Figs. 40–42. C. tonkinensis 40) median lobe, dorsal aspect; 41) median lobe, lateral aspect; 42) median lobe, apex; 43) spermatheca, lateral aspect. Figs. 44–46. C. krissiae 44) median lobe, dorsal aspect; 45) median lobe, lateral aspect; 46) median lobe, apex.