Intybia semperi (Champion, 1921)

Tshernyshev, Sergei E., 2016, Taxonomic revision of Intybia Pascoe, 1886 species (Coleoptera, Malachiidae) of Thailand and Philippines, Zootaxa 4147 (2), pp. 101-123 : 108-110

Intybia semperi (Champion, 1921)

( Figs 13–19 )

Laius semperi Champion, 1921b: 196 , 201, fig. 11; Wittmer 1941: 226. Intybia semperi: Plonski 2014b: 45 .

Material examined. 1 male: Philippines: Mindoro Island, Baco municipality, Halcon Mountain , 13°15′N 120°59′E, Aug. 2014, coll.—? ; 1 female, idem, Mindanao Island, Bukidnon Region, Kalatungan Mountain Range , 08°00′N 124°36′E, June 2014, coll.—?

Description. Male ( Fig. 13 ). Body elongate, suboval, evenly expanded posteriorly.

Head, pronotum, prothorax, scutellum and elytra black, except for white spots. Antennae yellow with black outer side of the 1st segment, light-brown 8th segment and black 9th–11th segments. Each elytron with two oval and slightly transverse wide spots, not reaching outer margin or suture, one above the middle, and the second below the middle near the apex. Underside of body and palpae black; legs dark brown with yellow tarsi except for brown claw segments. Surface evenly covered with short semi-erect light pubescence and sparse dark erect hairs. Vesicles yellow, and thoracic mesepimera black.

Head slightly narrower than pronotum, elongate, eyes small, round, protruding, but not stretched, frons flat; interocular area with thin longitudinal carina in a middle, genae slightly and narrowly impressed and oblique; clypeus extremely narrow due to very closely settled antennae, not elongate, transverse, straight; labrum not elongate, subquadrate; palpi simple with apical segment somewhat enlarged, subcylindrical, slightly triangular, posteriorly obliquely truncate at the tip, intermediate segments subtriangular, short; surface of head densely and coarsely punctured, with weak microsculpture, gold pubescence dense, short and adpressed.

Antennae filiform ( Fig. 14 ), 1.6 mm long, reaching the basal quarter of the elytra; 1st segment enlarged, short, triangular, slightly angulate at the outer apical angle, 2nd segment small, round-oval, 3rd segment enlarged and flattened, elongate, wide and oval, with two round impressions, with curved lamella from above near 4th segment possessing short bunch of hairs; 4th segment short and equilateral, 5th rectangular and slightly longer that 4th, 6th– 11th segments elongate and cylindrical, apical segment somewhat longer than previous, evenly narrowed and pointed at apex; surface evenly covered with short, light pubescence and sparse, semi-erect light hairs on outer sides of antennomeres.

Pronotum slightly elongate, longitudinal, barrel-shaped with emarginate lateral sides, each with small denticle slightly below the middle; very slightly narrowed from middle to base, anterior and posterior sides marginate and straight, disc slightly convex and narrowly depressed at base near angles; surface dull, densely punctate with distinct microsculpture, denser in depressed area, surface sparsely covered with fine, short, light adpressed hairs.

Scutellum small, narrow, rectangular, transversal, with straight apex, almost completely covered by pronotum, sparsely punctured, shiny, sparsely pubescent.

Elytra suboval, widened just behind the humeri, and slightly rounded and convex posteriorly and slightly impressed between humeri, wider at base than pronotum; humeri distinct; apices simple, suture slightly marginate and slightly elevate near humeri; surface dull, with dense and coarse punctures and distinct microsculpture, sparsely covered with double pubescence, gold short adpressed and strong erect hairs.

Hind wings normal.

Legs rather stout and elongate; posterior femora not reaching elytral apices; all tibiae straight, femora narrow, slightly compressed, not curved; all tarsi 5-segmented, 1st–4th segments slightly compressed, claw segments depressed, 2nd segment in anterior tarsi simple, lacking comb, claw-segment longest and widest in all legs and equal to 1st–3rd segments in all legs; claws short, thin, narrow and sharp, with small membrane at base.

Ventral body surface densely punctate, dull, evenly covered with sparse fine, depressed dark pubescence. Pygidium short, transverse, truncate at apex ( Fig. 15 ); ultimate abdominal ventrite bilaciniate, not narrow, transverse ( Fig. 16 ); aedeagus straight with stretched narrowed and curved dorsally lamella, a long tube with two rows of short strong spines at sides are visible inside endophallus ( Fig. 18 ); tegmen short, wide, with strongly short thin and pointed parameres which are 5 times shorter than the base of tegmen ( Fig. 17 ).

Length 2.7 mm, width (at elytral base) 0.8 mm.

Female. Differs from male by its body being slightly wider posteriorly, not widened 3rd antennal segment, which is slightly enlarged, strongly elongate and moderately longer than the 1st segment, 3rd, 4th and 5th antennal segments equal in length and short in comparison with 6th–11th. Hind wings normally developed. Length 2.8 mm, width (at elytral base) 0.8 mm.

Remarks. As with I. quadristrigata (Champion, 1921) , the species was also described in the genus Laius , but the same characters, unmodified anterior legs and spotted elytra, simple, unmodified head and simple, lacking comb anterior tarsi justified its inclusion in Intybia .

Distribution. The species was described from Luzon Island, the Philippines, and was known only from the type locality, this is first record from Mindoro and Mindanao islands ( Fig. 19 ).

Figures

FIGURES 13 – 19. Intybia semperi (Champion, 1921) comb. n., male, dorsal view (13); left antenna (14); pygidium (15); ultimate abdominal ventrite (16); tegmen (17); aedeagus, lateral (18); distribution map (19). Scale bar 0.5 mm.