Chlamisus mosaicus Tan, 1992

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 : 53-58

Chlamisus mosaicus Tan, 1992

(Figs 14-1; 14-2; 14-3; 14-4)

Tan, 1992: 776 (type locality: Xishan, Kunming, Yunnan; type deposited: IZ-CAS).

Material examined. Holotype: 1♂, “ Yunnan, Kunming, Xishan [Chinese letters] / 2200 m / Chinese Academy of Sciences [Chinese letters] // 10. V. 1981 / coll. Shuyong Wang [Chinese letters] // HOLOTYPE ” ; Allotype: 1♀, same data as Holotype ; Paratype: 4♀♀ 2♂♂, same data as holotype ; 1♂, “ Yunnan, Lushui [Chinese letters] / 1900 m / Chinese Academy of Sciences [Chinese letters] // 8. V. 1981 / coll. Shuyong Wang [Chinese letters]”. (IZ-CAS) Measurements. BL = 3.4 mm, BW = 2 mm, HL = 0.9 mm, HW = 0.85 mm, PL = 1.4 mm, PW = 1.8 mm, EL = 2.3 mm, PYL = 0.9 mm, PYW = 0.95 mm, AL = 0.8 mm, AA = 145°, SL = 0.3 mm.

Redescription. Body (Figs 14-1A, 14-2A) rather small, slightly granulate. Antennae, clypeus, labrum and tarsi covered with yellowish hairs, a scale-like miniature hair in each puncture on head. General color reddish to yellowish brown; pronotum with raised areas orange-brown to yellowish brown or to yellow, depressed areas between ridges black, a pair of large black spots extending forward from posterior margin; scutellum and prosternum black, with the center area yellow; elytra orange-brown mixed with yellowish brown, depressed areas partially black near tubercles, basal margin black; underside black near center and on inner margin of mesopleuron, yellowish brown on each side of mesothorax; pygidium yellow on raised areas, black on depressed area near base, with two black spots at each side of lateral carinae at apical third.

Head (Figs 14-1D; 14-2E) mostly reddish brown, with a black spot on vertex, extending to occiput, occiput black, eyes also black, labrum pale yellowish brown, translucent. General shape round, slightly longer than wide; densely and deeply punctured, with a shallow longitudinal concave along median line of vertex, obliquely raised on each side of this concave, slightly depressed transversely between antennae insertions; labrum rectangular, concave at apex, slightly broader than long.

Antennae (Figs 14-1I; 14-2C): scape and 6–8th segments reddish brown, 2–5th segments yellowish brown, and 9–10th segments dark brown; scape three times as long as broad,, slightly longer than the following four segments together, pedicel small and globular, 3rd and 4th segment slender, same length as pedicel, 5th–10th flat and broad, serrated, 11th cone-shape.

Pronotum (Fig. 14-1F) densely and deeply punctured, puncture intervals sharply raised; several irregular small tubercles on the lateral portion, the one in the middle larger than others, median disc strongly elevated, median longitudinal groove narrow, with four pairs of transverse short ridges bordering on each side, two pairs of oblique short ridges laterally; a yellow quadrate low tubercle on anterior declivity. Scutellum (Fig. 14-1H) prominent anteriorly, posterior-lateral angles moderately produced. Prosternum (Figs 14-1E; 14-2B) infundibulate, broadened at anterior one-third, prosternal process narrow, with apex bluntly pointed.

Elytra (Fig. 14-2G) rounded apically, lateral sides subparallel; deeply and coarsely punctured; suture teeth small and dense; densely rugose near basal margin from scutellum to median row, and slightly raised, humeri with a black spot, weakly rugose, coarsely rugose between humeri and median row; longitudinal ridges partially connected, tubercles sharp; sutural row consisting of three tubercles, weakly ridged basally and apically, 1st obsolete, 2nd connecting to 2nd tubercle of median row, 3rd merging with 3rd tubercle of median row into a transverse tubercle, 4th small, merging with 4th tubercle of median row; median row consisting of five tubercles, with longitudinal ridge throughout, 1st situated near basal margin, 2nd merging with 2nd tubercle of humeral row into a transverse tubercle, 5th large; humeral row consisting of three tubercles, 1st small, branching from 2nd sideways, 3rd small and transverse, weakly ridged between 2nd and 3rd; lateral row consisting of two tubercles, 1st transverse, 2nd longitudinal, small; one big and low triangular tubercle at each posterior-lateral angle, transversely extended, also a large tubercle consisting of several minute tubercles above it. Legs (Fig. 14-1J) yellowish brown, tibiae brown on apical half, hind femora with a black spot in the middle.

Abdomen (Fig. 14-1G) densely and deeply punctured, yellowish brown on 1–4th abdominal segments, black on base of 5th abdominal segment; 1st visible abdominal segment with two low tubercles on each side, 5th segment with a round and shallow fovea in the middle. Pygidium (Figs 14-1C; 14-2F) slightly broader than long, deeply and densely punctured, the punctures sparser near apex; median longitudinal carina straight and sharp, reaching to apex, and lateral carinae not short, slightly tuberculate apically, ending at one-third from apex, oblique at base, without transverse carina; interspaces of these carinae and the lateral portions moderately depressed in the middle, deeper at base, basal margin sharply raised, dilated on lateral ends.

Aedeagus (Figs 14-3C, 14-3D, 14-3E; 14-4A; 14-4B; 14-4C) with apex of median lobe moderately narrower, rounded, with several pubescence on top of each side, and densely punctured on the ventral side of distal part; median orifice with middle sclerite bending inwards from inside near ventral side at one-eighth of median lobe, outline close to outer margin; inner sac rectangular, base moderately prominent, apex part bilobed, obtuse; tegmen thin and weakly sclerotized.

Spermatheca (Figs 14-3B; 14-4D) right-angled bending halfway, curved towards the apex, acute at top, base strongly dilated, duct rather strongly sclerotized, irregularly coiled about 6 times. Rectal sclerites (Figs 14-3A; 14- 4E) moderately sclerotized, with no connection between the two sclerites on ventral side, sclerites oblate, narrowed towards outside, outer angle more narrowed, truncate.

Distribution. China (Yunnan).

Diagnosis. This species has a similar yellow and black color combination to C. lycocephalus sp. nov., but its body size is much smaller and no wolf-faced pattern on the pronotum. Its pronotum is strongly ridged throughout disc and the lateral outlines of elytra are rather parallel. This species is also similar to C. ferrugineus by having irregularly ridged pronotum, but can be distinguished by different coloration and much smaller tubercles on elytra.