Chlamisus pilifrons ( Lefèvre, 1883 ), Lefevre, 1883

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 : 63-68

Chlamisus pilifrons ( Lefèvre, 1883)

(Figs 16-1; 16-2; 16-3; 16-4)

Lefèvre, 1883: 62 (orig.: Chlamys pilifrons ; type locality: India, no precise locality; type deposited: MNHN); Chen, 1940: 194; Gressitt, 1942: 356, 367 (Yunnan); Gressitt, 1946: 93 (as Chlamisus pilifrons ); Gressitt & Kimoto, 1961: 183; Tan et al., 1980:146; Tan, 1992: 775.

Material examined. CHINA: Yunnan Province: 1♂, Lanping , 2300 m, 21. VIII.1984, coll. Shuyong Wang ; 1♀, Lanping , 2300, 19. VIII. 1 984, coll. Shuyong Wang ; 1♂, Xiaguan , 2050 m, 3. V. 1955, coll. Kryzhanovskij, O . L.; 1♂, Menglong, Ban-na, Mengsong , 1600 m, 22. IV. 1958, Shuyong Wang ; 1♀, Jingdong , 1170 m, 29.VI. 1956, coll. Kryzhanovskij, O . L.; 1♀, Jingdong , 1170 m, 23.VI. 1956, coll. Deyin Ling ; 1♀, Jingdong , 1300 m, 25. VI. 1956, coll. Keren Huang ; 3♂♂, Lushui , 1810 m, 11. VI. 1981, coll. Shuyong Wang ; 4♂♂ 2♀♀, Lushui , 1900 m, 11. VI. 1981, coll. Shuyong Wang ; 4♂♂, Lushui , 2230 m, 11. VI. 1981, coll. Shuyong Wang ; 3♂♂ 3♀♀, Lanping , 2300 m, 20. VIII. 1 984, coll. Shuyong Wang ; 5♂♂ 4♀♀, Mt. Bao , 1740 m, 17. VI. 1981, coll. Shuyong Wang ; 2♂♂ 1♀, Xishuangbanna, Mengzhe , 1750 m, 29. VI. 1958, coll. Shuyong Wang ; 1♀, Jingdong , 1170 m, 4. VII. 1956, coll. Kryzhanovskij ; 2♂♂ 3♀♀, Jingdong , 1170 m, 30. VI. 1956, coll. Kryzhanovskij ; 2♀♀, Jingdong , 1170 m, 23. VI. 1956, coll. Kryzhanovskij ; 1♀, Jingdong , 1170 m, 22. V. 1956, coll. Kryzhanovskij ; 1♀, Xishuangbanna , Da-meng-long, 650 m, 10. IV. 1958, collector unknown ; 3♀♀, Menglong, Banna, Mengsong , 1600 m, 27. IV. 1958, coll. Shuyong Wang ; Sichuan Province: 1♂, Huili, Iron Factory , 2100–2200 m, 4. VI. 1961, coll. Dingxi Liao ; 1♂, Luding, Moxi , Hai-luo-gou, 1420 m, 18. IX. 1982, coll. Shuyong Wang ; 1♂, Luding, Moxi , 1600 m, 18. VI. 1983, coll. Shuyong Wang ; Huili, Iron factory, 2100–2300 m, 4. VI. 1961, coll. Dingxi, Liao ; 1♂, Xiangcheng, Chaike , 3000 m, 21. VI. 1982, coll. Shuyong Wang ; 1♂, Luding, Moxi , 1600 m, 18. VI. 1983, coll. Shuyong Wang ; 2♂♂ 1♀, Luding, Moxi , 1500 m, 17. VI. 1983, coll. Shuyong Wang ; 1♂ 1♀. Luding, Xinxing , 1800 m, 14. VI. 1983, coll. Yuanqing Chen ; 1♀, Luding, Xinxing , 1900 m, 14. VI. 1983, coll. Yuanqing Chen ; 1♀, Luding, Xinxing , 2100 m, 14. VI. 1983, coll. Yuanqing Chen (IZ-CAS).

Measurements. BL = 2.8 mm, BW = 2.1 mm, HL = 0.8 mm, HW = 0.8, PL = 1.2 mm, PW = 1.8 mm, EL = 2.2 mm, PYL = 0.9 mm, PYW = 0.9 mm, AL = 0.7 mm, AA = 110°, SL = 0.25 mm.

Redescription. Body (Figs 16-1A, 16-2A) rather small and narrow, opaque. Last six segments of antennae, clypeus, labrum, tibiae and tarsi covered with yellowish hairs; head with punctures inserted by a white scale-like fine hair of irregular size, pronotum and elytra also densely covered with yellowish white hairs, respectively on the posterior lobe of pronotum and on the anterior part of elytra. General color black, with slight cupreous and piceous.

Head (Figs 16-1D; 16-2E) nearly round, densely covered with fine and shallow round punctures, sparser on vertex; depressed between eyes, with a shallow and broad concave along median line of vertex; an oblique short indistinct ridge on each side of vertex. Labrum reddish brown, rather small, rectangular, twice as broad as long. Eyes black.

Antennae (Figs 16-1I; 16-2C) pale yellowish brown with apical 6th segments and the underside of scape darker. Scape twice as long as broad, pedicel subglobular, 3rd and 4th segment short and slender, equal length, 5th slightly dilated, longer than 4th, 6–10th flat and broad, serrated, 11th ovate, slightly longer than broad, obtuse at apex.

Pronotum (Fig. 16-1F) densely and finely punctured, puncture intervals sharply raised; one large sharp tubercle on lateral portion; disc moderately elevated, median longitudinal groove deep and throughout, with a long ridge on each side and a pair of oblique ridges branching outwards, then bending inwards and connecting with the median ridges at top of posterior declivity, forming two circles on each side, and then a short ridge beside each circle.

Scutellum (Fig. 16-1H) short and wide, slightly prominent anteriorly, posterior-lateral angles produced. Prosternum (Figs 16-1E; 16-2B) infundibular, broad at base, strongly broadened medially, prosternal process narrow, with apex slightly dilated and bluntly pointed.

Elytra (Fig. 16-2G) rounded apically, lateral sides subparallel; densely, coarsely and deeply punctured, sparser apically, humeri weakly rugose; suture teeth small, almost thoroughly toothed except for at apex; finely rugose at basal margin between scutellum and median row; longitudinal ridges partially sharp and connected, tubercles distinct; sutural row weakly ridged, consisting of four tubercles, 1st small, 2nd larger, 3rd merging with the 3rd tubercle of median row into a large transverse tubercle, 4th merging with 4th of median row; median row narrow and sharp, consisting of five tubercles, 1st rather large, a short ridge branching towards suture below it, 2nd merging with 2nd tubercle of humeral row into a transverse tubercle, 5th large, also with a small and indistinct tubercle on each side of median row below 1st tubercle; humeral row narrow and sharp, consisting of two tubercles, 1st obsolete, 3rd small; lateral row consisting of two tubercles, 1st transverse, 2nd small; one low tubercle at posterior-lateral angle, a large tubercle consisting of several small tubercles above it. Legs (Fig. 16-1J) dark reddish brown, middle femora yellowish.

Abdomen (Fig. 16-1G) densely punctured, puncture intervals slightly raised. 1st visible abdominal segment with three tubercles near lateral margins; last visible segment with a large fovea in the middle, distinctly broader apically. Pygidium (Figs 16-1C; 16-2F) as long as broad, deeply and sparsely punctured, with median longitudinal carina obtuse, but sharp at base, lateral carinae close to median carina at base, curving outwards from basal onefourth, with a transvers carina connecting them; all three carinae punctured; interspaces of these carinae moderately depressed, and the lateral portions deeply depressed; basal margin strongly raised, densely punctured.

Aedeagus (Figs 16-3C, 16-3D, 16-3E; 16-4A, 16-4B, 16-4C) with apex of median lobe slightly narrower, top truncate with a small angular projection, two pubescence on top of each side, no punctures on the ventral side; median orifice with middle sclerite bending inwards under surface at one-quarter of median lobe, outline arching sideways acutely, lower part joining together at center; inner sac strongly narrowed at base, dilated in the middle, bilobed at apex, narrowed and slightly acute; tegmen weakly sclerotized.

Spermatheca (Figs 16-3B; 16-4D) hook-like bending halfway, very thin and sharp at apex, even at middle 1/3, narrowed posteriorly into a small stem, duct moderately sclerotized, extending about three times long of the spermatheca, then bending backwards. Rectal sclerites (Figs 16-3A; 16-4E) moderately sclerotized, weakly and closely connected between the two sclerites on ventral side, slightly prominent at lower middle, then narrowed, outer angle truncate, slightly acute below.

Distribution. China (Sichuan, Guizhou, Yunnan).

Diagnosis. This species is very similar to C. pubiceps , but can be easily distinguished from the latter by the longer and much denser hairs on anterior-declivity of pronotum, the ring-shaped ridges on its pronotum and the stronger cupreous tinge on elytra, whereas the latter has subtriangular shaped ridges on the pronotum.