Chlamisus speciosus Tan & Zhou, 1995

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 : 104-107

Chlamisus speciosus Tan & Zhou, 1995

(Figs 25-1; 25-2; 25-3; 25-4)

Zhou & Tan, 1995: 233 (type locality: Fujian, Jianyang, Huangkeng; type deposited: IZ-CAS); Zhou, 1999: 323, 327.

Material examined. Holotype: 1♂, “ Fujian, Jianyang, Huangkeng , Guilin [Chinese letters] / 290–320 m / Chinese Academy of Sciences [Chinese letters] // 4. VII. 1960 / coll. Fuji Pu [Chinese letters] // HOLOTYPE ” (IZ-CAS), (female specimen absent).

Measurements. BL = 3.4 mm, BW = 2.2 mm, HL = 1.1 mm, HW = 1.1 mm, PL = 1.7 mm, PW = 2 mm, EL = 2.5 mm, PYL = 0.7 mm, PYW = 0.75 mm, AL = 0.9 mm, AA = 120°.

Redescription. Body (Figs 25-1A; 25-2A) with moderate size and slender, mostly opaque. Labrum, antennae, central part of 1st abdominal segment and tarsi covered with short white hairs, elytra, pronotum and pygidium covered with miniature-haired punctures. Body color dusty-yellow; pronotum with raised areas pale-yellow to dusty-yellow, depressed areas very dark, and punctures black; scutellum black; elytra dusty-yellow, depressed areas dark with punctures black; underside reddish brown marked with black; pygidium black and slightly reddish on margins.

Head (Figs 25-1D; 25-2E) nearly round; dusty-yellow, dark on occiput and in the middle of vertex and on antennae insertions, black in the areas of large punctures on vertex; densely and shallow-roundly punctured near mouthparts, coarsely and sparsely punctured on vertex, puncture intervals raised, a longitudinal groove along median line of vertex, reaching to occiput, and a short raised ridge on each side. Labrum yellow, rectangular, twice as broad as long; eyes black.

Antennae (Figs 25-1I; 25-2C) yellowish brown, darker on 1st to 4th segments. Scape three times as long as broad, very narrow at base, pedicel small and quadrate, 3rd and 4th short and slender, 5–10th flat and broad, not so closely serrated, 11th triangular, obtuse apically.

Pronotum (Fig. 25-1F) coarsely, deeply and densely punctured; several irregular ridges on the lateral portion; disc strongly and globularly elevated, a depression on top of both anterior and posterior-declivity, median longitudinal groove throughout, but shallower and paler between these depressions basally and apically, black at top of disc; a pair of sinuous oblique sharp ridge starting from posterior margin, branching out from top of posterior-declivity, nearly reaching to anterior-margin and then broken, a pair of short longitudinal ridge between them at top of anterior-declivity, and another pair of transverse short ridge connecting the oblique long ridge at top of disc, a pair of short ridges laterally, and a pair of small pale yellow tubercles near anterior-margin. Scutellum (Fig. 25-1H) slightly narrower and sharply produced anteriorly, posterior-lateral angles strongly extended, apex obtuse. Prosternum (Figs 25-1E; 25-2B) infundibular, moderately broadened in the middle, prosternal process evenly extended, apex subacute.

Elytra (Fig. 25-2G) truncate apically, lateral sides of elytra slightly oblique; coarsely and deeply punctured, sparser near apex, puncture intervals slightly raised, but strongly raised laterally; suture teeth rather large, weak basally; basal margin from scutellum to near median row raised and strongly rugose, humeri weakly rugose; longitudinal ridges and tubercles sharp; sutural row consisting of four tubercles, weakly ridged, 1st and 2nd tubercles small, a very indistinct tubercle situated between them and the median row, 3rd large, merging with 3rd tubercle of median row into a transverse one, 4th small and next to suture, also a very small tubercle at end of disc next to suture; median row consisting of four tubercles, 1st situated near basal margin, 2nd small, merging with 2nd tubercle of humeral row into a transverse tubercle, 4th obsolete, 5th largest; humeral consisting of four tubercles, 1st small, 3rd large, with a curved ridge connecting another tubercle, and this tubercle is connected to 5th tubercle of median row by an oblique ridge; lateral row with two tubercles, 1st transverse, 2nd small; a large and sharp tubercle at the posterior-lateral angle. Legs (Fig. 25-1J) dusty-yellow, darker on tibiae, tarsi yellow.

Abdomen (Fig. 25-1G) finely and densely punctured, puncture intervals raised. 1st visible abdominal segment with two tubercles near lateral margins, 1st small, 2nd large and sharp, last visible sternite with a shallow round fovea in the middle. Pygidium (Figs 25-1C; 25-2F) slightly broader than long, deeply and rather densely punctured, median longitudinal carina and lateral carinae all sharp, wide and punctured near base, with an indistinct transverse carina connecting them at one-third; interspaces of these carinae and the lateral portions shallowly depressed, basal margin low, produced at lateral ends.

Aedeagus (Figs 25-3; 25-4) slightly narrower at apex, rounded apically, with some very sparse pubescence on each side and center of apex, without punctures on ventral side of distal part; median orifice with middle sclerite bending inwards slightly above surface at one-seventh of median lobe, truncate at top, outline close to outer margin; inner sac ovate, apex roundly bilobed, slightly restricted at center; tegmen moderately sclerotized.

Distribution. China (Fujian).

Diagnosis. This species is distinguishable by its dusty yellow coloration and the black depressed areas, and the two short ridges on occiput, and the color variation of longitudinal groove on pronotum unique.