Chlamisus maculiceps ( Gressitt, 1942 )

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 : 46-49

Chlamisus maculiceps ( Gressitt, 1942)

(Figs 12-1, 12-2; 12-3)

Gressitt, 1942b: 35, 3615 (orig.: Chlamys maculiceps ; type locality: Taam-yuen-tung, N. Guangdong; type deposited: LINGNAN); Gressitt, 1946: 92 (as Chlamisus maculiceps ; Fukien); Gressitt & Kimoto, 1961: 181 (Fukien).

Material examined. CHINA: Hunan Province: 1♀, Yongshun, Shan-mu River Forestry Station , 600 m, 4. VII. 1988, coll. Shuyong Wang ; Sichuan Province: 2♀♀, Mt. Emei [Emeishan], Qingyin Pavilion [Qing-yin-ge], 18. VI. 1957, coll. Keren Huang (IZ-CAS), (male specimen absent).

Measurements. BL = 4.5 mm, BW = 2.7 mm, HL = 1.25 mm, HW = 1.2 mm, PL = 1.8 mm, PW = 2.5 mm, EL = 3.2 mm, PYL = 1.15 mm, PYW = 1.1 mm, SL = 0.35 mm.

Redescription. Body (Figs 12-1A; 12-2A) rather large and opaque. Labrum, antennae and tarsi covered with short white hairs, other parts of body mostly glabrous. General color black; head deep reddish brown, black on occiput and center of vertex; pronotum mostly black, with a yellowish brown ring along anterior margin; scutellum, elytra and underside black.

Head (Figs 12-1D; 12-2C) nearly round, slightly longer than wide, densely covered with shallow round punctures; a shallow longitudinal groove along median line of vertex; labrum brown and translucent, rectangular, twice as broad as long. Eyes black.

Antennae (Figs 12-1I; 12-2E) yellowish brown, darker on scape, pedicel and 6th –7th segments. Scape twice as long as broad, very narrow at base, pedicel small and globular, 3rd and 4th long and slender, 5th slightly dilated apically, 6–10th flat and broad, not so closely serrated, 11th ovate, acute apically.

Pronotum (Fig. 12-1F) punctures fine and deep, densely distributed, puncture intervals raised; a pair of low tubercle on the lateral portion; disc globularly elevated, stronger posteriorly, anterior declivity rather flat, median disc with no distinguishable tubercles or ridges, only a very weak and almost indistinguishable longitudinal median groove. Scutellum (Fig. 12-1H) somewhat narrower at base than most species, sharply produced anteriorly, posterior-lateral angles strongly extended. Prosternum (Figs 12-1E; 12-2G) triangular, prosternal process very narrow and extended.

Elytra (Fig. 12-2F) slightly rounded apically, lateral sides subparallel; punctation coarse and deep, sparser than pronotum; humeri finely rugose; suture teeth small, absent at apex; basal margin from scutellum to median row strongly rugose; longitudinal ridges rather sharp, tubercles small; sutural row consisting of three tubercles, 1st very small, 2nd obsolete, 3rd merging with 3rd tubercle of median row into a transverse tubercle, 4th longitudinal and small, merging with 4th tubercle of median row, weakly ridged between 3rd and 4th, median row consisting of five tubercles, 1st situated near basal margin, 2nd merging with the 2nd tubercle of humeral row into a transverse tubercle, 5th large; humeral row with three tubercle, 1st and 3rd small; lateral row with two tubercles, 1st transverse, 2nd small; an obtuse tubercle at the posterior-lateral angle, a large tubercle consisting of several small tubercles above it. Legs (Fig. 12- 1J) mostly yellowish brown to reddish brown, hind legs marked with black on femora.

Abdomen (Fig. 12-1G) deeply and densely punctured; 1st visible abdominal segment with two large low tubercle near lateral margin, 5th segment with a small round fovea in the middle, and a short low longitudinal carina along median line of the fovea. Pygidium (Figs 12-1C; 12-1D) slightly longer than broad, coarsely and densely punctured, sparse at apical half, but very dense at apical margin, median longitudinal carina and lateral carinae all straight and sharp near apex, without transverse carina, interspaces of these carinae and the lateral portions deeply depressed, basal margin raised and prominent laterally.

Spermatheca (Figs 12-2H; 12-3B) hook-shaped bending halfway, very sharp at apex, then dilated, restricted only at base, duct moderately sclerotized, as wide as half of spermatheca, regularly coiled 2 times, then become narrower. Rectal sclerites (Figs 12-2I; 12-3A) strongly sclerotized, moderately connected between the two sclerites on ventral side, inner angle acute, then become strongly dilated, with a very strong and sharp projection at center below on each sclerite, outer angle truncate.

Distribution. China (Fujian, Guangdong, Hunan).

Diagnosis. This species is similar to C. corollinotatus sp. nov. and does not have any observable tubercles and ridges on the disc of pronotum, but differs from the latter by the color pattern of its pronotum which is mostly black rather than yellow.