Heteroglenea vicinalis Lin et Yang

Lin, Meiying, Montreuil, Olivier, Tavakilian, Gérard & Yang, Xingke, 2009, Reinstatement of the genus Heteroglenea Gahan, with four new combinations, four new synonyms and three new species (Coleoptera: Cerambycidae: Lamiinae: Saperdini), Zootaxa 2137, pp. 1-22 : 18-20

Heteroglenea vicinalis Lin et Yang , sp. nov. ( Figs 44–50 )

Description. Male, length: 8.3–9.8 mm, humeral width: 2.2–2.6 mm. Female, length: 8.1–10.5 mm, humeral width: 2.2–2.9 mm. Head with dense yellowish brown pubescence, with upper side of frons and three vittae on occiput black; antennae reddish brown, sparsely pilose below. Prothorax with yellowish brown pubescence except: 2 narrow vittae on the disc, a semi-rounded blackish brown circle (like that in H. gemella ) on each side. Scutellum pubescent. Elytra reddish brown, each with 5 yellowish brown pubescent maculae: a sutural stripe, a short longitudinal vitta on centre of basal 1/3, a small median spot confluent with sutural stripe, a long line from near humerus extending to apical 1/7 near lateral margin and a transverse apical vitta confluent with sutural stripe, forming a right angle. Ventral surface densely clothed with light ochreous pubescence, with some blackish brown spots lacking pubescence. Legs all pale testaceous. Head slightly broader than prothorax. Eyes deeply concave, inferior eye lobe higher than gena below, width subequal to (male) or less than (female) ½ of frons. Antennomere ratio: male, 10 1.8 16 15 14 13 12 11.5 11 10 11; female, 11 2 17 16 15 14 13 12 11 10 10.5. Prothorax almost as broad as long or slightly longer than broad (male). Elytra parallel-sided, sides serially punctuated, each with a humeral longitudinal ridge and an obtuse costa reaching near apex, truncated apically, not spined. Hind femur reaching fourth (female) or fifth (male) abdominal segment, first frontal tarsal segment expanded (only male), much wider than second tarsal segment, first hind tarsal segment longer than (male) or nearly as long as (female) the following two segments combined. Male terminalia ( Figs 47–49 ): Tegmen about 2.1 mm in length; lateral lobes moderately slender, each about 0.6 mm long and less than 0.3 mm wide, provided with a finely haired ridge at ventral base, apex with setae much shorter than lateral lobes; basal piece bifurcated distally; median lobe plus median struts slightly curved, a little longer than tegmen (8:7); median struts about one half of whole median lobe in length; dorsal plate slightly shorter than ventral plate; apex of ventral plate pointed; median foramen not elongated, with a small projection on lateral view; internal sac less than 3 times of whole median lobe, with five pieces of basal armature and three rods (almost combined into one); rod about 1.8 mm, slightly shorter than tegmen. Tergite VIII as broad as long, apex rounded, with dense and moderate long setae. Ventrite IX shorter than ringed part of tegmen. Female terminalia ( Fig. 50 ): Spermathecal capsule consisting of an expanded apical lobe and a stalk; stalk parallel with apical lobe and almost as long as apical lobe. Tignum longer than abdomen.

Diagnosis. This species is similar to H. momeitensis , but can be distinguished by: each side of prothorax with a semi-rounded blackish brown circle (similar to H. gemella ) instead of two narrow stripes; antennae totally reddish brown, scape not darker than other antennomeres.

Diagnosis between H. gemella and H. vicinalis :

H. gemella : scape darker than other segments; maxillary palpi and basal half of elytra darker; the two black dorsal longitudinal stripes on pronotum shorter; apical half of scutellum with yellow hairs; elytral median spot not confluent with sutural stripe; not forming a right angle between sutural stripe and apical transverse vitta, neither forming a small groove.

H. vicinalis : scape concolorous with other segments, whole antenna reddish brown; maxillary palpi and basal half of elytra lighter; the two black dorsal longitudinal stripes on pronotum longer; sides of scutellum with blackish hairs; elytral median spot confluent with sutural stripe; forming a right angle between sutural stripe and apical transverse vitta.

Remarks. It was a pity that we did not examine more material of H. momeitensis and couldn’t compare their genitalia. It is possible that this species is only a subspecies of H. momeitensis . We hope to compare the genitalia between these two taxa in the future.

Etymology. Because it is similar to H. momeitensis , the latin word ‘vicina’ means neighbour.

Distribution. Nepal, India.

Specimens examined.

Type material: Holotype, ɗ (9.5 mm long), Nepal, NW. of Pokhara, Kali Gandaki Khola, Tatopani, alt. 1100–1300 m, 1986. VI.14–17, leg. C. Holzschuh ( CCH); paratypes: 3 ɗ 6 Ψ, same data as holotype ( CCH, with one male deposited in IZAS); 20 ɗ 5 Ψ, same data but 1984. V. 12–14 ( CCH, with one female deposited in IZAS).

Other material: India: 1 ɗ, West Bengalen, Distr. Darjeeling, Kurseong, Malloutar, alt. 900 m, 1990. XI.1, leg. N. Dangal ( CCH).

Figures

FIGURES 44 – 45. Habitus, H. vicinalis Lin et Yang sp. nov. 44. paratype, male, from Nepal. b. lateral view. c. dorsal view. 45. paratype, female, from Nepal. H. head, frontal view. 46. claw of mid tarsus in the right side, showing the bifid anterior claw.

FIGURES 47 – 50. Terminalia of H. vicinalis Lin et Yang sp. nov. 47. male genitalia. a. ventral view. b. lateral view. c. dorsal view. 48. rods of endophallus. 49. Tergite VIII and ventrites VIII & IX in ventral view. 50. spermathecal capsule. Scale 1 mm.