Indomias anamalainus ( Marshall )

Y, R A M A M U Rt H & Ayri, Shaloo, 2010, Revision of the genus Indomias Marshall (Coleoptera, Curculionidae, Entiminae, Tanymecini) from India, Zootaxa 2357, pp. 1-49 : 10-11

4. Indomias anamalainus ( Marshall)

(figs.10, 36, 56, 92, 93, 141, 158, 172, 210, 211 and 212)

Sympiezomias anamalainus Marshall, 1916: 168 ; 1941: 350 [BMNH]

Description: Colour black, with thin, grey or bluish grey vestiture; prothorax with an ochreous yellow, lateral stripe; elytra with a similar stripe on the intervals six and seven, extending inwards at the base and near the apex as far as interval four, and with ochreous vestiture along the margin. Head as long as rostrum, upper surface moderately convex, finely punctate; frons with a median stria, which fuses with median furrow of rostrum and extending a little on to vertex. Rostrum plain dorsally, as long as broad, anterior margin only 0.8x as broad as the posterior margin; median furrow longer, broadest anteriorly, narrower posteriorly; lateral carinae distinct, parallel posteriorly; sides straight; scrobes narrow, uniformly thick, 0.8x as long as rostrum and almost touching either ends. Eyes dorsolateral, strongly convex, space between eyes 0.88x as the space between scrobes and as much as the breadth of rostrum at posterior margin (figs. 10 and 36). Antennae piceous; scape abruptly clavate; funicle with first segment as long as but little broader than second, third and fourth equal and broader than fifth and sixth, subequal, seventh triangular; club slightly broader and conical (fig. 56). Prothorax 1.1x as broad as long, its breadth at middle 1.2x as the posterior margin; sides smoothly rounded; anterior margin 0.9x as broad as the posterior margin, truncate dorsally and acute laterally, posterior margin subtruncate; upper surface more coarsely punctate. Legs with second tarsal segment without any trace of vestiture in the form of scales. Legs with hind tibial apex without any dense, golden yellow hairs. Elytra broadly (female) or narrowly ovate (male), with basal margin strongly raised, its external angle acute, humeral fold prominent and projecting, posterior declivity not impressed; apices mucronate (female) or pointed and not mucronate (male); longitudinal curvature moderately convex, deepest near middle and gradually sloping behind; stria deeply punctate; intervals broad, convex, moderately raised; elongate scales on the discal area much smaller; elytral vestiture with two types of scales, found in equal proportions. First type perfectly round, brown and with inner core granulated (fig. 92); second type elongate, their apices broader, with 3 ridges (fig. 93).

Male genitalia: Aedeagus with median lobe broadest at middle and at its junction with apophyses, length: breadth ratio 9:1; in profile apex pointed; transfer apparatus massive and conical; apophyses 0.57x as long as the median lobe (figs. 210–211). Tegmen with dorsal piece 8x as broad as the basal piece; parameres short, tubular, their apices poorly defined; manubrium uniformly thick, 0.5x as long as the median lobe, longer than tegmen, 1.2x as long as tegmen, its apex slightly bent and rounded (fig. 212). Spiculum gastrale with its shaft 1.1x as long as median lobe, uniformly thick but narrowed towards bluntly rounded apex; basal prongs triangular, subequal, their apices rounded (fig. 172).

Female genitalia: Spermatheca with proximal arm bulbous, 3x as broad as the distal arm, 1.33x as long as cornu, angle between proximal and distal arms obtuse; nodulus short, notched and continuous with apex of proximal arm; ramus 3x as broad as nodulus, more or less rectangular; cornu 0.33x as broad as proximal arm, slightly narrowed and rounded at apex (fig. 141). Spiculum ventrale with its shaft elongate, 5x as long as basal plate, uniformly thick, its apex bluntly pointed; basal plate laminate, with a short, pedicellate base, longer than broad (1:0.6), apical half subconical, apex rounded and fringed with many, thick hairs (fig. 158).

Length: male, 7.4–7.85 mm; female, 10.63 mm. Breadth: male, 2.85 mm; female, 3.99 mm.

Specimens examined: 1 male, INDIA: Tamil Nadu: Anamalais: Mount Stuart, 7.XII.1917, Coll. Y. R. Rao; 1 female, Kodaikanal, 5000 ft, 17.I.1917, Coll. Royal; 1 female, Tamil Nadu: Pulney hills, 4500 ft, 10– 11.V.1917, Coll. P. S. Nathan (NPC).

Distribution: India: Tamil Nadu; Anamalais; Kodaikanal; Palani hills.