Adiscus bodhisatva ( Gressitt, 1942 )

Duan, Wen-Yuan & Zhou, Hong-Zhang, 2022, Revision of the genus Adiscus Gistel, 1857 (Coleoptera: Chrysomelidae, Cryptocephalinae) from mainland China, Zootaxa 5096 (1), pp. 1-80 : 25-27

Adiscus bodhisatva ( Gressitt, 1942)

(Figs 9-1; 9-2)

Dioryctus bodhisatva Gressitt, 1942: 332 (type locality: Mt. Emei ; type deposited: ICRI).

Adiscus bodhisatva: Gressitt & Kimoto, 1961: 116 ; Schöller et al., 2010: 607 (catalogue).

Material examined. CHINA: Sichuan Province: 1 male, Emeishan, Jiulao hole, 4. VIII. 1957, coll. Youcai Lu ( IZ-CAS) ; 1 female, Wenchuan, Wolong, 24. VII. 1983, coll. Shuyong Wang ( IZ-CAS) ; Yunnan Province: 1 female, Lanping, 22. VIII. 1984, coll. Shuyong Wang ( IZ-CAS) .

Redescription. Measurements. Male. BL = 2.25 mm, BW = 1.48 mm, HL = 0.70 mm, HW = 0.77 mm, PL = 0.54 mm, PW = 1.22 mm, PA = 110°, EL = 1.85 mm, EA = 140°, AL = 0.78 mm, AW = 0.25 mm.

Females. BL = 2.25–2.69 mm, BW = 1.42–1.78 mm, HL = 0.76 mm, HW = 0.84 mm, PL = 0.58 mm, PW = 1.32 mm, PA = 110°, EL = 2.00 mm, EA = 140°, SL = 0.51 mm.

Body (Figs. 9-1A; 9-2A) ovate, dorsum strongly convex, mostly yellowish brown. Head, labrum, ventral side of mouthparts and antennomeres 1–4 yellowish brown, 5–11 brown; mandibles darkish brown. Elytra basal margin narrowly black, disc with 3 darkish brown spots, the first large, in middle basal region and near the suture, the second posterior to the first, the third anterior and slightly lateral to the second. Legs yellowish brown, lateral margin of tibia blackish, but not obvious. Venter yellowish brown.

Head with sparsely and coarsely fine punctures and sparsely short hairs. Eyes reniform, superior eye-lobes separated by same distance with antennal insertions. Clypeus with dense coarse punctures, anterior margin nearly straight. Antennae reaching elytral humeri, scape long and thick, pedicel suboblong, antennomeres 3 and 4 most slender, as broad as long, 5 slightly broader than 4, 6–11 somewhat broadened and long.

Pronotum (Figs. 9-1A; 9-2A) convex, smooth, much broader basely than apically, basal width about 2.3 times of pronotal length. Anterior margin nearly straight, posterior margin slightly sinuate with fine serration, and its middle portion produced into an obtuse angle of about 110°. Disc finely punctate.

Elytra (Figs. 9-1A; 9-2A) with humeri prominent and glabrous. Disc sparsely and finely punctate, with 11 regular striae, puncture striae irregular on apical slope, row intervals with scattered minute punctures. Epipleural lobe (Fig. 9-2B) large, lateral margins slightly expanded ventrally and arcuately lobe-formed at basal 1/3 of elytron, with both sides forming angle of 140°, epipleura nearly invisible in lateral view.

Venter clothed with sparse short pubescence. Prosternum (Fig. 9-2C) trapezoidal; anterior margin arcuately concave, lateral margin broad, lateral ridge elevated strongly, nearly straight in the lateral view, posterior margin nearly straight. Mesoventrite broad, about twice as broad as long. Pygidium with dense coarse punctures.

Aedeagus. (Fig. 9-2D–F) Median lobe elongate, 2.6 times as long as wide, parallel-sided. Apex of median lobe gradually narrow than middle, acute at apex, and strongly curved in lateral view; with several short sparse setae on each side of apex, lacking punctures on ventral side. Median orifice with middle square sclerite bending inwards beyond surface. Inner sac nearly pear-shaped, slightly acute at apex, gradually narrow from basal 1/3, bottom margin with two slender process. Tegmen Y-shaped, almost bifurcate at basal 1/3, weakly sclerotized, nearly translucent.

Female. Body more robust than male, abdomen unknown [missing from specimen]. Spermatheca (Figs. 9- 1C; 9-2G) falcate, 120°-angled bending halfway, slightly acute at apex; duct base thickened strongly, coiled, then becoming thinner, and coiling about 2–3 times, but the end of duct nearly straight. Rectal sclerites (Fig. 9-1D) strongly sclerotized, two sclerites rectangular, posterior margin sinuate, not connected in ventral view.

Distribution. China (Sichuan, Yunnan).