Parastenostola brunnipes (Gahan)

Lin, Meiying, Li, Wenzhu & Yang, Xingke, 2008, Taxonomic review of three saperdine genera, Mandibularia Pic, Mimocagosima Breuning and Parastenostola Breuning (Coleoptera: Cerambycidae: Lamiinae: Saperdini), Zootaxa 1773, pp. 1-17 : 11

Parastenostola brunnipes (Gahan)

( Figs. 17–23 )

Saperda brunnipes Gahan, 1888 , Ann. Mag. Nat. Hist., Ser. 6, 2: 65 (Jiangxi: Kiukiang=Jiujiang). Parastenostola brunnipes: Breuning, 1952 , Ent. Arb. Mus. Frey, 3: 200.

Mandibularia quadricolor Gressitt, 1951 , Longicornia, 2: 561, pl. 21, fig. 5 (Fujian). syn. nov.

Description. Male: length: 13.8–14.0 mm, humeral width: 3.6–4.0 mm. Female: length: 14.6–16.5 mm, humeral width: 4.6–5.2 mm. Body dark brown to black, red to brown on antennae and legs. Frons densely closed with yellow pubescence, eyes circled with yellow pubescence, occiput black; antennae red or reddish brown with thin gray pubescence, sometimes with apical 5–7 segments darker. Prothorax with a black macula on centre of disc, somewhat ì8 î shaped, with yellow pubescence at sides except for a small black spot on middle of each side. Scutellum and elytra dark brown, clothed with gray short pubescence. Ventral surface clothed with yellow pubescence at sides and with gray pubescence along middle of venter; pubescence on mesepisternum gray, mixed with yellow. Head fine and unevenly punctured. Lower eyelobes much longer than genae. Antennae slightly longer than body length; antennomere ratio: 17 3 23 19 16 13 12 11 11 10 13; female: 16 3 22 17 14 10 10 10 9 9 10. Punctures on pronotum irregular and uneven. Scutellum semicircle. Elytra evenly narrowed posteriorly, slightly truncated at apex, fine and densely punctured. Legs moderately stout, hind femur reaching middle of third abdominal segment. Male genitalia ( Fig. 21 ): Tegmen about 3.3 mm; lateral lobes short, each about 0.5 mm long and 0.13 mm wide, with setae at apex and around of dorsal surface, with two small lobes furnished with short and fine hairs at ventral base; roof very short; ringed part slightly elbowed in widest portion, converging; basal piece slightly bifurcated distally; median lobe with median struts slightly curved, a little longer than tegmen (37:33); former distinctly shorter than latter; dorsal plate longer than ventral plate; ventral edge of median orifice weakly projected; median foramen extremely elongated; internal sac moderately long, with a small armature at basal part, with four long and thin rods and a small crescent armature at basal of rods, hairlike rods about 5.3mm, much longer than tegmen or median lobes. Ejaculatory duct single. Female genitalia ( Figs. 22–23 ): Setae of sternite 7–8 shorter, slightly extending beyond apex. Spermatheca distinctly curved, S-shaped, about 1.8 mm long for a 14.6 mm adult, subequal to tignum. Tignum short, shorter than 1/3 of abdomen. Tignum 1.6 mm for an adult with a 5.8 mm abdomen in ventral view.

Diagnosis. Differs from other species in having antennae and legs reddish brown.

Remarks. Breuning (1952) described Parastenostola based on Saperda brunnipes Gahan, 1888 . It can be distinguished from Saperda Fabricius, 1775 by the nodosity just anterior to middle of each side of prothorax. Our dissection of male genitalia has confirmed that Parastenostola is a distinct genus, with very long and thin hairlike rods in the internal sac, much longer than tegmen or median lobe with median struts.

At the time when Gressitt (1951) described Mandibularia quadricolor based on a female specimen from Fujian, he did not compare it with brunnipes because Gahan put it in the genus Saperda . Although there are minor differences in the coloration of the antennomeres and the size and shape of black macula on the prothorax, we regard these as variations within species and therefore consider Mandibularia quadricolor as a junior synonym.

Type specimens examined. Cotype of Saperda brunnipes : China: male, Jiangxi, Jiujiang (Kiukiang), 1887.VI, coll. A. E. Pratt ( BMNH). Holotype of Mandibularia quadricolor Gressitt ), China: female, Fujian, Changting, 1940. VI.3, coll. T. C. Maa ( SYSU).

Other specimens examined. China: 1 male, Hunan, 1981. VI.27, coll. Huang & Lin ( HFRI); 1 female, Hunan, 1981. VI.24, coll. Huang ( HFRI); 1 female, Hunan, Mt. Hengshan, 1980.VI. ( HFRI).

Distribution. China: Jiangxi; Hunan, Fujian.

Figures

FIGURES 17 – 20. Parastenostola brunnipes (Gahan). 17. male, cotype, from Jiangxi. 18. male, from Hunan. 19. female, holotype of Mandibularia quadricolor Gressitt, from Fujian. 20. female, from Hunan.

FIGURES 21 – 23. Genitalia of Parastenostola brunnipes (Gahan). 21. male genitalia. a. dorsal view. b. lateral view. c. ventral view. 22 – 23. female genitalia, background green.