Chlamisus pubiceps ( Chûjô, 1940 ), Chujo, 1940

Su, Liang & Zhou, Hong-Zhang, 2017, Taxonomy of the genus Chlamisus Rafinesque (Coleoptera: Chrysomelidae) from China with description of three new species, Zootaxa 4233 (1), pp. 1-138 : 68-73

Chlamisus pubiceps ( Chûjô, 1940)

(Figs 17-1, 17-2; 17-3; 17-4)

Chûjô, 1940: 396 (orig.: Exema pubiceps ; type locality: Korea; type deposited: TARI); Chûjô, 1942: 54 (corrections of misprint); Gressitt & Kimoto, 1961: 184 (as Chlamisus pubiceps ); Gruev, 1978: 49; Tan et al., 1980: 147.

Material examined. CHINA: Shandong Province: 11♀♀ 15♂♂, Tai’an, Yaoxiang Forest Farm , 700 m, 7. VI. 1979, coll. Shuyong Wang ; Beijing: 1♂, Mt. Baihua , 1000 m, 5. VIII. 1972, collector unknown ; 1♂, Bada-ling , 700 m, 9. VI. 1964, coll. Shengqiao Jiang ; 1♂, Bada-ling , 700 m, 19. VI. 1973, Shengqiao Jiang ; 1♂, Mt. Shangfang , 400 m, 16. VII. 1961, coll. Shuyong Wang ; Beijing: 2♂♂, Badaling , 24. VII. 1964, coll. Shuyong Wang ; 2♀♀, Badaling , 570 m. 19. VII. 1962, coll. Shuyong Wang ; 3♀♀, Mt. Baihua , 1200 m, 5. VIII. 1972, coll.

Shuyong Wang; Hebei Province: 1♀, Xinglong Tower Front , 700 m, 3. VII. 1963, coll. Shengqiao Jiang ; 1♀, Mt. Wuling , 1500 m, 4. VII. 1963, coll. Shengqiao Jiang ; 2♂♂, Mt. Wuling , 1500 m, 4. VII. 1963, coll. Shengqiao Jiang ; 9♂♂ 7♀♀, Mt Wuling , 1200–1800 m, 5. VII. 1963, coll. Shengqiao Jiang ; Heilongjiang Province: 1♂ 4♀♀, Gaolingzi , 29. VI. 1941, coll. A’ling ; Fujian Province: 1♀, Mt. Longqi , 19. V. 1991, coll. Yongshan Shi (IZ-CAS).

Measurements. BL = 3.25 mm, BW = 2 mm, HL = 0.9 mm, HW = 0.85 mm, PL = 1.4 mm, PW = 1.9 mm, EL = 2.2 mm, PYL = 0.95 mm, PYW = 1 mm, AL = 0.8 mm, AA = 120°, SL = 0.25 mm

Redescription. Body (Figs 17-1A; 17-2A) small and opaque. Elytra covered with miniature-haired punctures, puncture intervals slightly raised, head and prosternum with short and sparse hairs, anterior portion of pronotum sparsely covered with longer hairs; antennae, labrum and tarsi covered with yellowish white hairs. General color black, marked with piceous, slightly cupreous on pronotum.

Head (Figs 17-1D; 17-2E) nearly round, slightly longer than broad, deeply and densely punctured, sparse on vertex; depressed longitudinally between eyes to occiput; labrum brown, rectangular, twice as broad as long, slightly concave on apex; eyes black.

Antennae (Figs 17-1I; 17-2C) yellowish brown, darker on 1–5th segments. Scape three times as long as broad, pedicel globular, 3rd segment slender, 4th only half as long as 3rd, 5th slightly dilated, longer than 4th, 6–11th flat and broad, serrated.

Pronotum (Fig. 17-1F) densely, and deeply punctured, sparser on disc; a round tubercle on lateral portion; median disc moderately elevated, depressed immediately behind anterior margin, median longitudinal groove broad and shallow, bordered by a pair of longitudinal ridges, an oblique ridge branching from top of posterior declivity, connecting to median ridge by a short transvers ridge at top of disc, and at top of anterior declivity, which forms two subtriangular circle on each side. Scutellum (Fig. 17-1H) broad, prominent anteriorly and posteriorly, posterior-lateral angles extended. Prosternum (Figs 17-1E; 17-2B) infundibulate, broad at middle, prosternal process extended.

Elytra (Fig. 17-2G) rounded apically, lateral sides subparallel; coarsely, deeply and sparsely punctured; suture teeth small and sharp, only absent at apex; basal margin rugose from scutellum to median row, humeri moderately rugose; longitudinal ridges and tubercles sharp; sutural row consisting of four tubercles, 1st small, 2nd large, 3rd merging with 3rd tubercle of median row into a transverse tubercle, 4th small, merging with 4th of median row, weakly ridged between 3rd and 4th; median row consisting of five tubercles, 1st situated near basal margin, 2nd merging with 2nd tubercle of humeral row into a transverse tubercle, 5th largest, granulate at top; humeral row consisting of two tubercles, 1st obsolete, 2nd with a short ridge branching outwards; lateral row with two tubercles, 1st transverse, 2nd small; one big tubercle at posterior-lateral angle, connected to median row by a curve transverse ridge, and a large tubercle consisting of several small tubercles above it. Legs (Fig. 17-1J) yellowish brown, marked with black in the middle of front and middle femora and tibiae, hind femora and tibiae largely black, yellowish near joints.

Abdomen (Fig. 17-1G) densely and finely punctured, puncture intervals raised. 1st visible abdominal segment with two tubercles near lateral margins, 5th segment with a round fovea in the middle, a pair of small tubercles in the middle near base. Pygidium (Figs 17-1C; 17-2F) as long as broad, deeply and densely punctured, median longitudinal carina narrow and sharp, throughout, lateral carinae sinuate and punctured, with a distinct carina connecting at one-third from base, where lateral carinae are curved towards center, interspaces of these carinae and the lateral portions moderately depressed, basal margin raised, slightly produced on lateral ends.

Aedeagus (Figs 17-3C, 17-3D, 17-3E; 17-4A; 17-4B; 17-4C) narrowed anteriorly, truncate apically with a small angular projection, a row of pubescence on top of each side, and dense punctures on the ventral side of distal part close to apex; median orifice with middle sclerite bending inwards a little below surface at one-quarter of median lobe, outline arched to very close to outer margin, almost joining below; inner sac almond shape; tegmen moderately sclerotized.

Spermatheca (Figs 17-3B; 17-4D) bending right-angled halfway, thin but obtuse at apex, narrowed towards base, duct weakly sclerotized, with no obvious coiling. Rectal sclerites (Figs 17-3A; 17-4E) strongly sclerotized, a very weak and thin connection between two sclerites on ventral side, inner angle acute, dilated at middle below, outer angle truncate, slightly produced.

Distribution. China (Heilongjiang, Beijing, Hebei, Liaoning, Shandong, Fujian); North Korea.

Diagnosis. This species has a similar pronotum ridge arrangement to C. pilifrons , but can be distinguished from the latter by the subtriangular-circled ridges (not rounded ones) and the much sparser hairs on its pronotum.