Pseudocossonus shanghaiensis Omar, Zhang et Davis

Omar, Youssef Mohamed, Zhang, Runzhi & Davis, Steven R., 2006, Descriptions of two new species of Pseudocossonus Wollaston (Coleoptera: Curculionidae: Cossoninae) from mainland China with a key to the world species, Zootaxa 1375, pp. 59-68 : 61-64

Pseudocossonus shanghaiensis Omar, Zhang et Davis , sp. nov.

( Figs 1–3 , 8 –13)

Holotype. Female. China. Shanghai: [Sheshan [31.4N, 122.2E], Shanghai City; 6 X 1947; leg. Unknown. ( IOZ)]. Paratype. 1 female, same data as the holotype.

Diagnosis. Body 5.94 mm long; rostrum and posterior 1/4 of head castaneous, anterior 3/4 of head and pronotum fuscous, elytra dark brown, antenna and legs chestnut brown; eyes reddish-brown, with some black maculae, with a black band around their boundaries; scrobe located at anterior 1/2 of rostrum and barely reaching anterior margin of eye, with upper margin slightly projected; pronotum slightly broader than long, constricted at apex, dorsally curved; intervals impunctate, sharply convex, smooth, sub-equal, width sub-equal to diameter of punctate striae.

Description. Holotype, female. Measurements: BL: 5.94 mm; EL: 3.12 mm; EWB: 1.41 mm; EWW: 1.41 mm; PL: 2.73 mm; PW: 1.33 mm; RL: 0.91 mm; RWA: 0.38 mm; RWB: 0.40 mm; AL: 1.23 mm; ASL: 0.40 mm; AFL: 0.36 mm; ACL: 0.28 mm; ACW: 0.19 mm. Habitus: elongate, oblong, and narrow, greatest width at base of elytra which gently taper before elytral declivity. Color: rostrum and posterior 1/4 of head castaneous, rest of head and pronotum fuscous, elytra dark brown, antennae and legs chestnut brown, glossy, vitreous throughout. Rostrum ( Figs 8–9 ): moderately long, slightly longer than 0.5 x length of pronotum, gently curved and convex basally, uniform but slightly swollen before point of antennal insertion with fine sub-circular punctures throughout, a sparse covering of fine, minute setae; epistomal suture obscure. Scrobe conspicuous, deep, located at anterior 1/2 of rostrum and barely reaching anterior margin of eye; point of antennal insertion at basal 1/4 of rostrum, upper and lower margins along anterior 1/4 slightly projected down and up respectively. Antennae: chestnut brown, glossy, long, stout; scape shorter than length of funicle and club combined, with scattered sub circular punctures, apical 2/3 widened slightly; funicle slightly compact, with 7 subclavate articles, long, sparse, suberect setae with a pale hue; club composed of 3 articles, pale yellowishbrown, ovate, with densely appressed and sub-erect setae. Eyes: reddish-brown besmeared with some black maculae, a black band around its boundary, moderately convex, subcircular, with coarse, convex facets, widely separated dorsally, located dorso-laterally before base of rostrum. Head: shallowly constricted behind eyes, oval, with minute, subcircular punctures, punctures separated by approximately 2– 4 x puncture diameter; posterior 1/3 glabrous, glossy; head ventrally transluscent, smooth, impunctate, with midlongitudinal black line from base continued until rostrum. Pronotum: slightly broader than its length, constricted anteriorly, dorsally curved, with fine circular punctures throughout, punctures separated by approximately 2– 4 x puncture diameter, basal margin sub-linear, lateral margins broadly curved. Scutellum : chestnut brown, glossy, vitreous, inconspicuous, more or less level with elytra, feebly convex. Elytra: shiny, epipleural fold modified to close elytra, disc convex, uniform, and elongate, lateral sides parallel until posterior 1/4, beyond moderately tapered to apex, apical posterior margin subquadrate, anterior margin sublinear, striae with shallow, subcircular punctures, punctures separated by approximately 1.5– 2 x puncture diameter; intervals impunctate, barely convex, smooth, sub-equal in width, width sub-equal with diameter of striae; humeri truncate, umbonate. Ve n t e r: with sparse, fine punctures throughout, punctures separated by 2– 3 x puncture diameter; prosternum coarsely, shallowly and sparsely punctate, procoxal cavity closed, procoxae separated by 0.5x diameter of coxa; mesosternum with mesocoxal cavity closed, mesocoxae separated by slightly greater distance than metacoxae, posterior margin crenulate; metasternum with a fine furrow at middle posterior 1/2, metacoxal cavity open; ventrites: with fine, suberect setae, alutaceous, with sparse, minute punctures, punctures on I–IV separated by distance approximately 3– 4 x puncture diameter, punctures more dense on V; I and II nearly confluent with a small suture, III and IV sub-equal in width. Legs: femur longer than tibia, texture slightly coarse, vitreous, widened at distal 2/3, slightly laterally flattened, sparsely punctate, proximal and distal ends fuscous; tibia moderately strong, with elliptical, sparse punctures, and fine erect setae, proximal end fuscous, uncus at outer apical angle approximately as long as tarsomere 5, small mucro on inner apical margin, distal surface before uncus with setal comb; tarsus with tarsomeres 1–3 slightly compact, distal margins slightly concave, bearing pale, suberect setae; tarsomere 5 long, wide basally and becoming narrower apically, smooth, glossy, curved; pretarsal claw simple. Abdomen and female genitalia. tergites, 8th sternite, hemisternites, and spermatheca illustrated in Figs 10–13. Pygidium with punctures separated by approximately 1– 3 x puncture diameter, punctures nearly absent along anterior margin except at anterior middle. Apophysis of 8th sternite approximately same length as 8th sternite. Hemisternite with stylus approximately 1/ 4 x length of coxite. Spermatheca wider basally, narrowing slightly apically.

Etymology. The specific epithet is derived from the type locality, Shanghai, China.

Host plant: Unknown.

Distribution: Sheshan, Shanghai City, eastern China.

P. yunnanensis , holotype, female. 4, lateral view; 5, dorsal view.

Figures

FIGURES 1 – 3. P. shanghaiensis, holotype, female. 1, lateral view; 2, dorsal view; 3, enlargement of dorsal view of head.

FIGURES 6 – 9. Head and rostrum. 6 – 7, P. yunnanensis, holotype, dorso-anterior and lateral view; 8 – 9, P. shanghaiensis, holotype, dorso-anterior and lateral view.