Chaetocnema (Chaetocnema) philippina Medvedev, 1996

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 : 88-90

31. Chaetocnema (Chaetocnema) philippina Medvedev, 1996

( Fig. 52 )

Chaetocnema philippina Medvedev, 1996: 68 . TL: Philippines, Luzon, Limay. TD: Medvedev collection.

Distribution: Philippines, Malaysia.

Host plants: Unknown.

Description: Body Length 2.40–3.00, body width 1.45–1.70. Ratio of elytron length (along suture) to width (maximum): 2.00–2.10. Ratio of pronotum width (at base) to length: 1.65–1.75. Ratio of length of elytron to length of pronotum (along middle): 2.45–2.55. Ratio of width of elytra at base to width of pronotum at base (in middle of humeral calli): 1.15–1.20. Ratio of maximum width of elytra to maximum width of pronotum: 1.35–1.45.

Dorsum blue with metallic luster. Antennomeres yellow to yellow brown, distal ones being darker. Tibiae yellow brown. Pro- and mesofemora yellow brown. Metafemora dark brown.

Head hypognathous. Frontal ridge extremely wide, slightly convex, width of frontal ridge subequal to length of 1 st antennomere . Frontolateral sulcus present. Suprafrontal sulcus deep laterally, absent in middle. Orbital sulcus deep. Ratio of width of frontal ridge (excluding margin) to width of antennal socket variable: 1.50–2.20. Number of punctures on vertex: 8–10 on each side near eye. Number of punctures on orbit: 1–2 on each side. Number of punctures on frons (triangular area surrounded by frontolateral sulcus and clypeus): 0. Number of setae on clypeus: approximately 15. Number of setae on labrum: 6. Anterior margin of labrum straight.

Pronotum without short longitudinal impressions near basal margin. Deep row of large punctures at base of pronotum absent. Pronotal base slightly sinuated, obviously expanded in middle. Lateral margins of pronotum almost straight, converging forward. Anterolateral prothoracic callosity weak, protruding laterally, somewhat truncate. Posterolateral prothoracic callosity poorly developed. Pronotal punctures elongate. Diameter of pronotal punctures 4 to 6 times smaller than distance between them.

Elytra with convex lateral sides. Elytral punctures many times larger than that of pronotum. All rows of elytral punctures regular and single. Interspaces between striae of punctures smooth and glabrous. Number of rows of minute punctures on each interspace: 2. Humeral calli well developed.

Excavation on metatibia moderately deep. Large lateral denticle on metatibia sharp. Metatibial serration proximal to large lateral denticle absent.

Spermathecal receptacle flask-shaped. Spermathecal duct nearly straight proximally, coiled distally. Spermathecal pump with cylindrical apex, much shorter than receptacle. Receptacle basally much wider than apically. Apex of vaginal palpi widened. Anterior end of anterior sclerotization narrowly rounded. Posterior sclerotization longer than wide. Posterior sclerotization wider than anterior.

Type: 1♂ (Paratype) ( NHMB): 1) Philippines, 150 m, Palawan, Port Barton , 14–18.Dec.1990, Bolm lgt.; 2) Chaetocnema granulicollis Jac. det. L. Medvedev ; 3) Paratypus Chaetocnema philippina m. L. Medvedev det. 1996.

Material: 1♂ ( IZCAS), Malaysia, Borneo , Sabah W, II.2000, leg. Snizek, Chaetocnema philippina det. Döberl, 2001 ; 3♂ 2♀ ( USNM), M alaysia, Sabah, Telipok , 12.VIII.1983, leg. G. F. Hevel & W. E. Steiner. ; 1♀ ( USNM), M alaysia, Sabah, Domeo. Sabah W Ranau– Tambunan route, 30.VI.1999, leg. M. Snizek, Chaetocnema philippina det. Döberl, 2001 ; 2♂ ( USNM), Malaysia, Sabah, Telipok , 12.VIII.1983, G. F. Hevel & W. W. Steiner ; 1♂ 1♀ ( USNM), Philippines: Mt. Makiling , Luzon, leg. Baker, 1927 .

Remarks: C. philippina is close to C. sumatrana , C. montivaga and C. wallacei in the general body shape, but it differs from the latter three species by its metallic blue dorsum. Aedeagus of C. philippina resembles that of C. hainanensis which also has ridges on either side ventrally. However, these two species are distinctly different in body size and color, general shape of aedeagus and other external characters.

Figures

FIGURE 52. Chaetocnema philippina. A Male habitus. B Pronotum. C Head, frontal view. D Aedeagus, ventral view. E Aedeagus, lateral view. F Apex of aedeagus, ventral view. G Vaginal palpi. H Spermatheca. I Pygidium (tergite 7) of female.