Chaetocnema (Udorpes) westwoodi Baly, 1877

Ruan, Yongying, Yang, Xingke, Konstantinov, Alexander S., Prathapan, Kaniyarikkal D. & Zhang, Mengna, 2019, Revision of the Oriental Chaetocnema species (Coleoptera, Chrysomelidae, Galerucinae, Alticini), Zootaxa 4699 (1), pp. 1-206 : 194-196

84. Chaetocnema (Udorpes) westwoodi Baly, 1877

( Fig. 113 )

Chaetocnema westwoodi Baly, 1877: 311 ; TL: Indonesia, Batchian. TL: BMNH. Lectotype designated here.

Chaetocnema harita Maulik, 1926: 204 . TL: India, Madras. TD: BMNH. Lectotype designated here. (Syn. Nov.)

Distribution: India ( Maulik, 1926), Nepal, Indonesia ( Baly, 1877).

Host plants: Unknown.

Description: Body length 2.50–2.70 mm, body width 1.40–1.50 mm. Ratio of elytron length (along suture) to width (maximum): 2.12–2.16. Ratio of pronotum width (at base) to length: 1.60–1.62. Ratio of length of elytron to length of pronotum (along middle): 2.50–2.55. Ratio of width of elytra at base to width of pronotum at base (in middle of humeral calli): 1.10–1.15. Ratio of maximum width of elytra to maximum width of pronotum: 1.35–1.40.

Dorsum bronzy green. Antennomeres entirely yellow brown, with apical ones deeper in color. Tibiae and tarsi yellow brown. Pro- and mesofemora yellow brown. Metafemora brown with green metallic luster.

Head hypognathous. Frontal ridge wide and flat. Ratio of width of frontal ridge to width of antennal socket: 2.18–2.20. Frontolateral sulcus absent. Suprafrontal sulcus shallow, with a pit in middle. Orbital sulcus shallow; supraantennal sulcus absent, orbit merge with vertex. Punctures on vertex and orbit large, very closely placed, with interspaces smaller than diameter of a puncture. Number of punctures on orbit: approximately 7-9 on each side, rugged and close. Frons covered with white setae and numerous punctures, a longitudinal impunctate area present at middle. Number of setae on clypeus: approximately 30. Number of setae on labrum: 6. Anterior margin of labrum more or less straight.

Pronotum without longitudinal impressions near basal margin. Deep row of large punctures at base of pronotum absent. Pronotal base evenly convex. Lateral margins of pronotum evenly convex, slightly converging forward. Anterolateral prothoracic callosity weak and round. Posterolateral prothoracic callosity absent. Pronotum covered with large and close punctures, leaving a longitudinal area at middle near base impunctate and smooth. Diameter of pronotal punctures 1-1.5 times smaller than distance between adjacent punctures.

Elytra with convex sides. Scutellar punctures form four confused rows. Remaining rows of punctures on elytron regular and single. Interspaces between striae of punctures smooth and glabrous, slightly granulated, strongly costate at sides. Humeral callus well developed.

First male protarsomere slightly larger than second. Excavation on metatibia very shallow. Large lateral denticle on metatibia obtuse. Metatibial serration proximal to large lateral denticle absent.

Apex of aedeagus in ventral view narrowing abruptly. Ventral longitudinal groove well developed on distal half of aedeagus. Apical denticle in ventral view prominent and produced, truncate apically. Minute transverse wrinkles absent on ventral side. Aedeagus in lateral view unevenly curved, with apex more or less straight.

Types: Chaetocnema westwoodi Baly , Lectotype: 1 (BMNH), labels: 1) Type H.T.; 2) M. K.; 3) Baly Coll.; 4) Chaetocnema westwoodi Baly, Batchian ; 5) Lectotype Chaetocnema westwoodi Baly, 1877 Des Ruan et al., 2016 .

Chaetocnema harita Maulik , Lectotype: 1♂ (BMNH), 1) Type; 2) Chipurupalli, Vizagapatam Dist, India, R. S. Patuck, B. M. 1924–7; 3) Chaetocnema harita Mlk., Det. S. Maulik , Type, 1925; 4) Lectotype Chaetocnema harita Maulik, 1926 , Des. Ruan et al., 2016.

Chaetocnema harita Maulik , Paralectotypes: 1♂ 2♀ (BMNH), 1) Chipurupalli, Vizagapatam Dist, India, R. S. Patuck, B. M. 1924–7; 2) Chaetocnema harita Mlk., Cotype, 1925 , S. Maulik; 3) Paralectotype Chaetocnema harita Maulik, 1926 , Des. Ruan et al., 2016.

Material: 1 ( BMNH), Belgaum, India. N, 1965, Chaetocnema concinnipennis Baly, Andrewes, Bequest, B. M. 1922 –221, Chaetocnema westwoodi Baly, Det. Yongying Ruan, 2016 ; 2 ( BMNH), Nilgiri Hills, India, H. L. Andrewes, Andrewes, Bequest, B. M. 1922–221, Chaetocnema westwoodi Baly, Det. Yongying Ruan, 2016 ; 1 ( BMNH), Nilgiri Hills, India, A. K. Weld Downing, H. E. Andrewes Coll., B. M. 1945–97, Chaetocnema westwoodi Baly, Det. Yongying Ruan, 2016 .

Remarks: C. westwoodi resembles C. midimpunctata sp. nov. in having a longitudinal impunctate area on pronotum. However, it differs by the longer antennae and much larger body size.

Figures

FIGURE 113. Chaetocnema westwoodi. A–C: Photo of Lectotype of Chaetocnema harita Maulik (A habitus. B Head, frontal view. C Pronotum). D–F: Photo of Paralectotype of Chaetocnema harita Maulik (D Aedeagus, ventral view. EAedeagus, lateral view. F Apex of aedeagus, ventral view).