Chlamisus ruficeps ( Chen, 1940 )

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 : 77-81

Chlamisus ruficeps ( Chen, 1940)

(Figs 19-1; 19-2; 19-3; 19-4)

Chen, 1940: 198 (orig.: Chlamys ruficeps ; type locality: Kwangsi: Yangso; type deposited: IZ-CAS); Gressitt, 1946: 94 (as Chlamisus ruficeps ); Gressitt & Kimoto, 1961: 185; Medvedev, 1968: 564 (as Chlamysus ruficeps ; Sha Pa, Vietnam); Kimoto & Gressitt, 1981: 361; Tan et al., 1980: 150; Zhou, 1999: 323, 327.

Material examined. CHINA: Fujian Province: 1♀, Mt. Longqi [Long-qi-shan], 18. V. 1991, coll. Yongshan Shi ; 1♂, Chong’an, Xing Village, Qili Bridge , 840–870 m, 25. V. 1960, coll. Fuji Pu ; 1♀, Chong’an, Xing Village, Longdu , 580–640 m, 5. VI. 1960, coll. Yong Zuo ; 1♂, Chong’an, Xing Village, Longdu , 580–620 m, 5. VI. 1960, coll. Shengqiao Jiang ; 1♀, Jianyang, Huangkeng, Aotou , 950 m, 29. V. 1973, coll. Peiyu Yu ; 1♀, Jianyang, Huangkeng, Aotou 680–950 m, 6. V. 1960, coll. Fuji Pu ; Guangxi Province: Tianling, Langping, Mt. Linao , 1250– 1400 m, 29. V. 2002, coll. Guofang Jiang ; Sichuan Province: 1♀ 1♂, Wanxian, Wang’erbao , 1200 m, 10. VIII. 1993, coll. Xingke Yang (IZ-CAS).

Measurements. BL = 3.8 mm, BW = 2.4 mm, HL = 1.2 mm, HW = 1.05 mm, PL = 1.7 mm, PW = 2.15 mm, EL = 2.6 mm, PYL = 1.2 mm, PYW = 1.2 mm, AL = 0.9 mm, AA = 115°, SL = 0.4 mm,

Redescription. Body (Figs 19-1A, 19-2A) size moderate; body color black to dark brown, opaque. Elytra and pronotum with short yellowish haired punctures; antennae and labrum sparsely haired, tibiae and tarsi covered with short yellowish white hairs.

Head (Figs 19-1D; 19-2E) vertex dark brown to black, reddish from clypeus to frons; nearly round, slightly longer than broad, finely, deeply and densely punctured, puncture intervals slightly raised on vertex; clypeus raised; labrum yellow, short and wide, triangular, twice as broad as long; eyes black.

Antennae (Figs 19-1I; 19-2C) yellowish brown, darker on last six segments. Scape twice as long as broad, pedicel triangular, 3rd and 4th slender, 5th slightly dilated, 6–10th flat and broad, serrated, 11th piriform, acute on apex.

Pronotum (Fig. 19-1F) deeply and densely punctured, relatively sparser anteriorly and laterally; two tubercle on the lateral portion; median disc strongly spherically elevated, median longitudinal groove narrowed medially, broad and shallow at top of posterior declivity, not reaching to scutellum, an oblique ridge branching from the longitudinal median ridge on each side, and a short transverse ridge connecting them with median ridge, which forms an ovate circle, and a short ridge on each side of these structures. Scutellum (Fig. 19-1H) broad, prominent anteriorly, posterior-lateral angles acute but not so much extended. Prosternum (Figs 19-1E; 19-2B) infundibulate, broaden medially, prosternal process weakly extended.

Elytra (Fig. 19-2G) rounded apically, lateral sides of elytra subparallel; coarsely, deeply and moderate-sparsely punctured; humeri granulate, strongly and coarsely rugose between humeri and median row; suture teeth small, absent at apex; basal margin slightly rugose from scutellum to near median row; longitudinal ridges sharp, tubercles rather small; sutural row consisting of three tubercles, 1st obsolete, 2nd small and longitudinal, 3rd merging with 3rd tubercle of median row into a transverse tubercle, 4th small and indistinct, weakly ridged between 3rd and 4th; median row consisting of four tubercles, 1st situated near basal margin, 2nd merging with 2nd tubercle of humeral row into a transverse tubercle, 4th obsolete, 5th largest and longitudinal; humeral row consisting of two tubercle, 1st obsolete, 3rd with a short ridge curving outwards; lateral row consisting of two tubercles, 1st small and transverse, 2nd moderate sized; one large cone-shaped tubercle at posterior-lateral angle, and a large tubercle consisting of several small tubercles above it. Legs (Fig. 19-1J) rather slender, front and middle femora yellowish brown, hind leg black to dark brown.

Abdomen (Fig. 19-1G) densely and finely punctured, lateral sides slightly rugose. 1st visible abdominal segment with one tubercles near lateral margins, last visible segment with a small round fovea in the middle. Pygidium (Figs 19-1C; 19-2F) as long as broad, finely and densely punctured, median longitudinal carina narrow and sharp, throughout; lateral carinae straight and sharp, very close to median carina, with a distinct transverse carina connecting at one-third from base; all the carinae punctured and parallel; interspaces of these carinae shallowly depressed, and the lateral portions deeply punctured; basal margin strongly raised and very smooth.

Aedeagus (Figs 19-3C, 19-3D, 19-3E; 19-4A; 19-4B; 19-4C) with apex of median lobe slightly narrower at apical one-eighth, top moderately acute, with several pubescence on each side of apex, and densely punctured on ventral side of distal part; median orifice with middle sclerite bending inwards a little above surface at one-sixth of median lobe, outline close to outer margin, lower part of outline slightly inclined towards center; inner sac rounded both ends, restricted near base, dilated and obtuse at base; tegmen moderately sclerotized.

Spermatheca (Figs 19-3B; 19-4D) hook-shaped, bending from halfway, acute at the apex and dilated to almost three quarters then narrowed; duct weakly sclerotized, irregularly coiled 4–6 times. Rectal sclerites (Figs 19-3A; 19-4E) strongly sclerotized, weakly connected between two sclerites on ventral side, slightly prominent at lower middle, raised at upper two-third, inner angle somewhat obtuse, outer angle acute with a small notch below.

Distribution. China (Fujian, Hubei, Guangxi); Vietnam.

Diagnosis. This species is similar to C. capitatus for they have nearly same coloration on pronotum and elytra, but the former has distinct and more continuous ridges on elytra, while the latter has somehow broken elytral ridges; both have a median longitudinal groove on pronotum, but it changes narrower posteriorly in the former; the median carina of pygidium is also much sharper and distinct in the former species.