Chlamisus superciliosus Gressitt, 1946

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 : 118-121

Chlamisus superciliosus Gressitt, 1946

(Figs 28-1, 28-2; 28-3; 28-4)

Gressitt, 1946: 96 (type locality: Yim-na San (Yam-na Shan), alt. 600 meters, N. E. Kwangtung Prov. , S. E. China ; type deposited: CAS); Gressitt & Kimoto, 1961: 188.

Material examined. CHINA: Yunnan Province: 1♂, Xishuangbanna , Da-meng-long, 650 m, 18. IV. 1958, coll. Leyi Deng (IZ-CAS), (female specimen absent).

Measurements. BL = 2.55 mm, BW = 1.7 mm, HL = 1.2 mm, HW = 0.75 mm, PL = 1.25 mm, PW = 1.5 mm, EL = 1.8 mm, PYL = 0.8 mm, PYW = 0.7 mm, AL = 0.7 mm, AA = 120°.

Redescription. Body (Figs 28-1A, 28-2A) rather small and opaque. Labrum, antennae and tarsi covered with short white hairs, other parts of body mostly glabrous. General color black; head pale yellow, slightly darker on occiput, center of vertex and antennae insertions; pronotum mostly black, a triangular yellowish marker at anteriordeclivity, with its longer edge on anterior margin and a triangular notch in middle of posterior margin scutellum, elytra and ventral side black.

Head (Figs 28-1D; 28-2E) nearly round, slightly wider than long, densely and shallow-roundly punctured, shallowly depressed on upper-center of vertex; labrum dark brown, small, triangular, three times as broad as long, eyes black.

Antennae (Figs 28-1I; 28-2C) yellowish brown, scape and pedicel darker; scape three times as long as broad, pedicel small and subtriangular, 3rd and 4th very short and slightly dilated, as long as pedicel combined, 5th longer and narrower than 4th, 6–10th flat and broad, closely serrated, 11th ovate.

Pronotum (Fig. 28-1F) very deeply and densely punctured, slightly sparser on lateral portions, puncture intervals slightly raised on disc; a large low tubercle on lateral portions; disc strongly globularly elevated, anterior declivity rather flat, median longitudinal groove deep and broad, narrowed basally, ended at top of posteriordeclivity, a narrow and low longitudinal ridge on each side of the groove, and an oblique ridge branching on top of posterior declivity, which having a transverse ridge connecting to the median ridge. Scutellum (Fig. 28-1H) rather broad, weakly produced anteriorly, posterior-lateral angles extended and obtuse. Prosternum (Figs 28-1E; 28-2B) goblet-shaped, prosternal process with lateral projections acute, apex also acute and extended.

Elytra (Fig. 28-2G) rounded apically, lateral sides slightly oblique; coarsely, deeply and very sparsely punctured, sparser on apical half; suture teeth rather large, only absent at apex; basal margin from scutellum to near median row weakly rugose and raised, humeri weakly rugose; longitudinal ridges sharp near tubercles, weaker away, tubercles distinct; sutural row weakly ridged, consisting of three tubercles, 1st obsolete, 2nd very small, 3rd merging with the 3rd tubercle of median row into a transverse tubercle, 4th small, merging with 4th tubercle of median row; 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 largest; humeral row consisting of three tubercle, 1st small, 2nd branching outwards a short ridge, 3rd small; lateral row with two tubercles, 1st transverse, 2nd small; a sharp tubercle at the posterior-lateral angle, with a median sized tubercle consisting of several small tubercles above it, and a curved oblique tubercle above the median sized tubercle. Legs (Fig. 28-1J) yellowish brown to reddish brown, hind leg black, front and middle tibiae with a black stripe in the middle, front femora with a yellow spot in the middle, tarsi yellowish brown.

Abdomen (Fig. 28-1G) coarsely, shallow-roundly and densely punctured; 1st visible abdominal segment with two large tubercles near lateral margins, 5th abdominal segment with a shallow and small fovea in the middle. Pygidium (Figs 28-1C; 28-2F) distinctly longer than broad, coarsely, deeply and very sparsely punctured, with fine and dense punctures on lateral carinae and on apex, median longitudinal carina sharp and throughout, lateral carinae rather straight, slightly sinuate, the carinae are close to each other, a transverse carina at one-fifth from basal margin, interspaces of these carinae moderately depressed, and the lateral portions deeply depressed.

Aedeagus (Figs 28-3; 28-4) gradually narrowed towards apex, rounded apically, without pubescence, densely punctured on ventral side of distal part; median orifice with middle sclerite bending inwards slightly above surface at one-eighth of median lobe, almost truncate at top, outline close to outer margin, a pair of oblique folds on ventral side meeting in the middle; inner sac oblong, wide at base, apex bilobed, restricted at middle; tegmen very weakly sclerotized.

Distribution. China (Guangdong, Hainan).

Diagnosis. This species is similar to C. corollinotatus . sp. nov., but the yellow area on pronotum is small and triangular in form, attached to the anterior margin, while the latter has yellow pronotum with a black crown-shaped spot near the posterior margin.