Chaetocnema (Udorpes) pusaensis Maulik, 1926

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 : 184-186

77. Chaetocnema (Udorpes) pusaensis Maulik, 1926

( Fig. 107 )

Chaetocnema pusaensis Maulik, 1926: 203 . TL: India: Bihar, Pusa. TD: BMNH. Lectotype designated here.

Distribution: India, Pakistan ( Döberl, 2010).

Host plants: Boring in stem of Panicum miliaceum (common millet) ( Maulik, 1926). Eleusine coracana ( Jagadish and Ali, 1986) , “millets” ( Ayyar, 1963), Panicum spp ( Ayyar, 1963; Anonymous, 1954), Panicum miliaceum ( Scherer, 1969) (all Poaceae ).

Description: Body length 2.20–2.40 mm; width 1.20–1.30 mm. Ratio of elytron length at suture to maximum width: 2.40–2.42. Ratio of pronotum width at base to length at middle: 1.40–1.42. Ratio of length of elytron at suture to length of pronotum at middle: 2.45–2.46. Ratio of width of both elytra at base to width of pronotum at base: 1.11–1.13.

Dorsum coppery. Antennomere 1 bicolorous, partially dark brown. Tarsi and tibiae red brown. Pro- and mesofemur dark red brown; metafemur deep brown.

Head hypognathous. Frontal ridge between antennal sockets wide and flat. Frontolateral sulcus absent. Su- prafrontal sulcus relatively deep, well defined, obcordate. Ratio of width of frontal ridge between outer ridge of antennal sockets to width of antennal socket: 2.80–2.90. Frons with punctures 2-3 times larger than those on vertex; covered with relatively short, white setae; with a middle longitudinal area without punctures. Vertex flat, situated on same level as orbit. Surface of vertex densely and evenly covered with small punctures.

Base of pronotum without short longitudinal impressions. Deep row of large punctures at base of pronotum absent. Pronotal base evenly convex. Area adjacent to mid-basal margin of pronotum covered with punctures. Lateral margins of pronotum evenly rounded, with maximum width near middle.Anterolateral and posterolateral prothoracic callosities poorly developed. Diameter of pronotal punctures 1–1.5 times smaller than distance between them.

Elytra with slightly convex lateral sides, elytral punctures confused, with those on sides of elytra more or less paired or tripled. Humeral callus well-developed.

Large lateral denticle on metatibia moderately developed. Metatibial serration proximal to large lateral denticle absent.

Aedeagus almost parallel sided in ventral view, with apex narrowing abruptly. Ventral longitudinal groove welldeveloped, deep, apically narrower than basally. Apical denticle of aedeagus in ventral view well-differentiated, wide, with truncate apex; straight in lateral view. Minute transverse wrinkles absent or poorly developed on ventral side of aedeagus. Aedeagus in lateral view unevenly curved, with maximum curvature situated near base.

Spermathecal pump much shorter than receptacle, with apex flattened. Spermathecal receptacle sinuate. Maxi- mum width of receptacle situated at base. Vaginal palpus narrowed towards apex, with lateral margin slightly convex. Vaginal palpus narrowing from base till middle, thence slightly widening towards apex. Anterior sclerotization of vaginal palpus strongly widening anteriorly, nearly straight; broadly rounded at anterior end. Posterior sclerotization longer than wide. Posterior sclerotization about as wide as anterior.

Types: Lectotype: 1 (BMNH), labels: 1) Type; 2) P6, vii, 1920, boring stem of Panicum miliaceum, Pusa, Rangi Coll., C : no. 2043; 3) Chaetocnema pusaensis Mlk., Det. S. Maulik , Type, 1925; 4) Examined K. Prathapan, 2005; 5) Lectotype Chaetocnema pusaensis Maulik, 1926 Des. Ruan et al., 2016 .

Paralectotype: 6 (BMNH), labels: 1) Cotype; 2) P6, vii, 1920, boring stem of Panicum miliaceum, Pusa, Rangi Coll., C : no. 2043; 3) Chaetocnema pusaensis Mlk., Det. S. Maulik, Cotype, 1925 .; 4) Paralectotype Chaetocnema pusaensis Maulik, 1926 Des. Ruan et al., 2016 .

Materials: 2♀ ( USNM), India, Hyderabad , 18.I.67, KEGibson sweeping field, Chaetocnema det. A. Konstantinov , Chaetocnema (Chaetocnema) pusaensis Maulik det. Yongying Ruan, 2016; 1♀ ( USNM) , India, Uttar Prad. Kanpur , 21–24. Sept. 1968, K. E. Gibson; 3 ( BMNH) , Chipurupalle , Vizagapatam Distr., India, R. S. Patuck, B. M. 1924–7, Chaetocnema pusaensis Mlk, Det. S. Maulik, 1925 ; 2 ( BMNH) , 19.II.15, South India, Coimbatore on Pari vasagu plants, C. K. S. Coll., Pres by Imp. Bur. Ent, Brit. Mus. 1929–104; 1 ( BMNH) , H. L. Andrewes , Nilgiri Hills, India, Andrewes, Bequest, B. M. 1922–221, Chaetocnema pusaensis Maulik, 1926 , Det. Yongying Ruan , 2016.

Remarks: This species is extremely close to the Palearctic species C. kabakovi Konstantinov et al., 2011 from Afghanistan and C. nocticolor Lopatin, 1995 from Iran (see Konstantinov et al., 2011). They appear to have similar aedeagus and external characters. Further study is required to reveal the true relationship among them. This species is also close to the following Palearctic Species: C. grandis Pic , C. sinuata Weise , C. mannerheimii

(Gyllenhal), C. hortensis (Geoffroy) , C. aridula (Gyllenhal) , C. igori Konstantinov et al. , C. arenacea (Allard) and C. leonhardi Heikertinger. However , it may be differentiated from all of them by the shape of aedeagus.

Figures

FIGURE 107. Chaetocnema pusaensis. A Female habitus. B Head, frontal view. C Pronotum and peri-scutellar area. D Aedeagus of Paralectotype, ventral view. E Aedeagus of Paralectotype, lateral view. F Apex of aedeagus, ventral view (Paralectotype). G Vaginal palpi. H Spermatheca. I Tignum. J Pygidium (tergite 7) of female.