Chaetocnema (Chaetocnema) resplendens Warchalowski, 1973

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 : 93-95

34. Chaetocnema (Chaetocnema) resplendens Warchalowski, 1973

( Fig. 55 )

Chaetocnema (Tlanoma) resplendens Warchalowski, 1973: 48 . TL: Vietnam (Nam-Dinh prov., Van-Diem). TD: Warchalowski Collection??.

Distribution: Vietnam ( Warchalowski, 1973), Myanmar, Nepal, Bhutan, India, Pakistan, Philippines.

Host plants: Paddy seedling (Rice) leaf.

Description: Body length 1.45–1.80 mm, body width 0.90–1.00 mm. Ratio of elytron length (along suture) to width (maximum): 2.20–2.25. Ratio of pronotum width (at base) to length: 1.60–1.65. Ratio of length of elytron to length of pronotum (along middle): 2.40–2.50. 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: 1.40–1.50.

Dorsum yellow brown to red brown, scarcely dark brown, shiny without metallic luster. Antennomeres 1–4 completely yellow, 5–10 brown. Tibiae and tarsi yellow to dark yellow. Pro- and meso- femur yellowish brown. Metafemur black or dark brown.

Head hypognathous. Frontal ridge narrow, flat. Frontolateral sulcus present. Suprafrontal sulcus shallow and faint, nearly straight. Ratio of width of frontal ridge between outer ridge of antennal sockets to width of antennal socket, 1.65–1.75. Frons with two rows of long setae laterally. Vertex flat, situated on same level as orbit, without punctures, except a few closely placed punctures bearing setae present on each side near eye.

Base of pronotum without longitudinal impressions. Deep row of large punctures at base of pronotum present throughout. Pronotal base obviously expanded in middle. Elytron with scutellar row of punctures single and regular. Second to eleventh rows of punctures at base of elytron regular. Humeral callus well-developed.

First protarsomere of male almost as large as that in female. Large lateral denticle on metatibia obtuse. Metatibial serration proximal to large lateral denticle absent. Excavation on metatibia moderately deep.

Apex of aedeagus in ventral view narrowing gradually. Ventral longitudinal groove of aedeagus absent or poorly developed. Apical denticle of aedeagus in ventral view long and pointed; curved ventrally in lateral view. Minute, transverse wrinkles on ventral side of aedeagus absent. Aedeagus in lateral view nearly straight. Maximum curvature of aedeagus in lateral view situated near apical denticle.

Spermathecal pump much shorter than receptacle, with flat apex. Spermathecal receptacle short and sinuate. Maximum width of receptacle situated medially. Receptacle basally narrower than apically. Apex of vaginal palpus evenly rounded. Vaginal palpus narrowing from base to middle, thence slightly widening towards apex. Anterior sclerotization of vaginal palpus slightly widening anteriorly.Anterior end of anterior sclerotization broadly rounded. Posterior sclerotization longer than wide. Posterior sclerotization about as wide as anterior.

Material: 2♂ 3♀ ( USNM), Myanmar, Tenasserim, MUS. PRAGENSE, Coll. Helfer,? Ch. tonkinensis Chen ; 1 ( USNM), Nepal, Katmandu, Oct.–Nov. 1958, J. Maldonado, sweeping, Chaetocnema det. A. Konstantinov, Chaetocnema resplendens det. Yongying Ruan, 2016; 1♂ 1♀ ( USNM), Bhutan, Rd from Damphu to Wangdi, river valley N 27 07.779 E 90 04.160, 16.ix. 2005, 584m, wp–108, leg. K. Mahat, P. Loday, A. Konstantinov & K. D. Prathapan; 3♀ ( USNM), Bhutan, 24km N Damphu 16.IX.2005, wp–109, leg. K. Mahat, P. Loday, A. Konstantinov & K. D. Prathapan; 1♀ ( USNM), India: Punjab, Patialai, V.1978. J. S. mann, Chaetocnema resplendens , det. Döberl, 2001 ( USNM); 2♂ 3♀ ( USNM), South India, Easten Ghats Karnataka, Chikmagular , 15.XI.2003, leg. Konstantinov, Prathapan, Saluk; 8 ( USNM), Swept at night, New delli, India, 20.Aug.1968, Chaetocnema det. A. Konstantinov, Chaetocnema resplendens Warchalowski Det. Yongying Ruan, 2016 ; 1♂ 3♀, India W.Bengal, 1963, ex. paddy seedling (leaf) 63–26319, Chaetocnema d.G.B.Vogt, Chaetocnema resplendens det. Yongying Ruan, 2016; 1 ( USNM), Chabua Assam India, 4–XII–43, DEHardy, Chaetocnema det.A. Konstantinov, Chaetocnema resplendens det. Yongying Ruan, 2016; 4 ( USNM), Assam India, III–44, D. E. Hardy, Chaetocnema det. A. Konstantinov, Chaetocnema resplendens det. Yongying Ruan, 2016; 2 ( USNM), Chabua Assam India, XII–44, DEHardy, Chaetocnema det. A. Konstantinov, Chaetocnema resplendens det. Yongying Ruan, 2016; 2 ( USNM), 6 mile NW of Digboi, Assam India, 30–III–44, D. E. Hardy, Chaetocnema det. A. Konstantinov, Chaetocnema resplendens det. Yongying Ruan, 2016; 2 ( USNM), Chabua Assam India, 4–XII–43, DEHardy, Chaetocnema det. A. Konstantinov, Chaetocnema resplendens det. Yongying Ruan, 2016; 4 ( USNM), Mt. Makiling, Luzon ( Philippines), Baker, Chaetocnema spp. det. A. Konstantinov, Chaetocnema resplendens det. Yongying Ruan, 2016; 2 ( USNM), Pakistan: N.W.F. Swat Valley, 15mi SW Barikot, 16 October 1977, Collectors: Gary F. Hevel & Mushtaq Ahmad, Chaetocnema det. A. Konstantinov, Chaetocnema resplendens det. Yongying Ruan, 2016.

Remarks: Type materials are not available for this study, the species concept is based on the original description and illustration of aedeagus provided by Warchalowski (1973).

This species resembles C. yaosanica and C. tonkinensis , however, it can be differentiated from C. yaosanica and C. tonkinensis by the unique shape of the aedeagus and broader body.

Figures

FIGURE 55. Chaetocnema resplendens. A Male habitus. B Head, frontal view. C Pronotum and peri-scutellar area. 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.