Chlamisus corollinotatus, Su, Liang & Zhou, Hong-Zhang, 2017

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 : 13-17

Chlamisus corollinotatus sp. nov.

(Figs 5-1; 5-2; 5-3; 5-4)

Type locality. CHINA: Guangxi Province: Pingxiang.

Type material examined. Holotype: 1♂, “ Guangxi Province: Pingxiang / 14. IV. 1963, coll. Shuyong Wang ” (IZ-CAS) . Paratype: 1♂, same as holotype.

Measurements. BL = 3.9 mm, BW = 2.4 mm, HL = 1 mm, HW = 1.05 mm, PL = 1.6 mm, PW = 2.3 mm, EL = 2.7 mm, PYL = 1 mm, PYW = 1 mm, AL = 1.25, AA = 115°.

Description. Body (Figs 5-1A; 5-2A) large and opaque. Labrum, antennae, prosternal process, tarsi and apex of tibiae covered with short yellowish hairs, elytra and underside with miniature-haired punctured. General color black, partially yellow; antennae yellow; pronotum mostly yellow with a crown-shape black spot touching scutellum.

Head (Figs 5-1D; 5-2E) mostly yellow, a triangular yellowish brown spot on upper center of vertex and reaching to occiput, raised between eyes. Head shape round, covered densely with shallow round punctures. Labrum yellow, rectangular, rounded apically, twice as broad as long. Eyes black.

Antennae (Figs 5- 1I; 5-2C) yellow, 4th segment slightly darker than others; scape twice as long as broad, narrow at base, robust at apex; pedicel small and globular; 3rd and 4th very short, 3rd slightly longer than 4th, 5th–10th flat and very broad, 11th triangular.

Pronotum (Fig. 5-1F) finely and densely punctured, very sparse on top of disc, puncture intervals raised; disc globularly elevated, stronger posteriorly, anterior portion rather flat, with no distinguishable tubercles or ridges on the disc, and a very low large tubercle on the lateral portion. Scutellum (Fig. 5-1H) broad, produced anteriorly, posterior-lateral angles extended. Prosternum (Figs 5-1E; 5-2B) triangular, prosternal process extended and slightly dilated near apex, apex sharp.

Elytra (Fig. 5-2G) rounded apically, lateral sides of elytra subparallel; coarsely, densely and deeply punctured; suture teeth with moderate size, absent at apex, weaker at base; basal margin from scutellum to median row weakly rugose, humeri finely rugose; longitudinal ridges sharp, tubercles small; sutural row consisting of three tubercles, 1st weak and indistinct, 2nd obsolete, 3rd merging with 3rd tubercle of median row into a transverse tubercle, 4th small, next to suture; median row consisting of four tubercles, 1st situated near basal margin, 2nd merging with the 2nd tubercle of humeral row into a transverse tubercle, 4th obsolete, 5th largest and cone-shape; humeral row consisting of two tubercle, 1st obsolete, 3rd transverse; lateral row with two tubercles, 1st transverse, 2nd small; a big tubercle at the posterior-lateral angle, and a large tubercle consisting of several small tubercles above it. Legs (Fig. 5-1J) yellow and slender.

Abdomen (Fig. 5-1G) finely, deeply and densely punctured. 1st visible abdominal segment with one very low tubercle near lateral margins, 5th segment with a deep round fovea in the middle, broaden apically. Pygidium (Figs 5-1C; 5-2F) as long as broad, densely and deeply punctured, median longitudinal carina and lateral carinae throughout, very smooth on the surface, lateral carinae slightly sinuate, with no distinct transverse carina connecting, the three carinae rather close to each other, interspaces of these carinae and the lateral portions rather deeply depressed; a raised area on each side and on the apex of pygidium, basal margin raised and smooth.

Aedeagus (Figs 5-3; 5-4). Apex of median lobe slightly narrower than middle, acute at apex, with several pubescence on each side of apex, densely punctured on ventral side of distal part; median orifice with middle sclerite bending inwards above surface at one-fifth of median lobe, outline close but not reaching to outer margin; inner sac rather narrow, cylindrical, dilated at base; tegmen weakly sclerotized, almost translucent.

Etymology. The specific epithet is composed of two Latin words, corolla (crown) and notatus (marked), referring to the crown-shaped black spot on the pronotum.

Distribution. China (Guangxi).

Diagnosis. This species is similar to C. maculiceps , but can be distinguished from the latter by the crownshaped black pattern on pronotum, the yellowish coloration on nearly complete head and legs, and the yellowish hairs on the prosternal process.