Trichomacrocyrtus nubes, Rukmane-B‚rbale, 2022

Rukmane-B ‚ rbale, Anita, 2022, A new species of the genus Trichomacrocyrtus Yoshitake, 2018 (Curculionidae: Entiminae: Pachyrhynchini) from Luzon Island, Philippines, Baltic Journal of Coleopterology 22 (2), pp. 437-441 : 438-440

Trichomacrocyrtus nubes sp. nov.

( Fig. 1 , 2 )

Type material. Holotype, male: “ PHILIPPINES / Luzon , Barlig, Bontoc / V. 2020 / local collector leg.” (white rectangular label, printed); “ HOLOTYPE / male / Trichomacrocyrtus nubes / Rukmane­B‚rbale 2022 / det. RukmaneB‚rbale 2022” (red rectangular label, printed) ( DUBC).

Paratypes (1 male, 1 female): Both with the same white rectangular printed locality label as holotype; with the following red printed labels: “ PARATYPE / male / Trichomacrocyrtus nubes / Rukmane­B‚rbale 2022 / det. Rukmane­B‚rbale 2022” (); “ PARATYPE / female / Trichomacrocyrtus nubes / Rukmane­B‚rbale 2022 / det. Rukmane­B‚rbale 2022” () .

Description. Male. Measurements: LB: 13.1­ 15.8 (Holotype 15.8; mean 14.45); LP: 3.7­ 4.6 (Holotype 4.6; mean 4.3); LE: 10.0­ 11.7 (Holotype 11.7; mean 10.85); WE: 6.4­ 8.3 (Holotype 8.3; mean 7.35); WP: 3.9­ 4.4 (Holotype 4.4; mean 4.15); LR: 2.3­ 3.1 (Holotype 3.1; mean 2.7); WR: 2.1­ 2.3 (Holotype 2.3; mean 2.2). N=2 for all measurements. Dorsal habitus as shown in Fig. 1A .

Integument black, very shiny, underside with weaker lustre; markings of green round to recumbent scales on elytra, pronotum, rostrum, femur and underside; metasternum densely covered with green round scales, mingled with long, light hairs, strongly pubescent; elongated patch of scales on each side of ventrite I; rest of the ventrites without scales, mingled with long light hairs.

Head sub ovate, nearly smooty except area between eyes with stronger puncture and rugosity; genae without scales, mingled with short light hairs; forehead strongly wrinkled between eyes, nearly 3 times as wide as eye width; patch of green round scales from the middle of forehead to medial part of rostrum; rostrum slightly pubescent at basal halh, then strongly pubescent to apex; short light hairs from antennal scape to labrum; in dorsal contour narrowed at subbasal part, slightly widened to medial part and straigth to apical part, subapical part slightly narrowed; dorsally with longitudinal groove from middle of rostrum to medial part of forehead, transverse groove at subbasal part and deep sub ovate depression from apical half to base of the forehead, apical part with moderate bulge; eyes not convex, relatively small, not prominent from the outline of the head. Antennae slender; segment I nearly 1.5 times as long as segment II, 2 times as long as wide, segment II 1.5 times longer than segment III, 1.5 times longer than wide, segments III–VII sub­equal in size, gradually increasing to club, wider than long, club lanceolate, nearly 2 times longer than wide; longer than wide, LR/ WR 1.35.

Prothorax sub cylindrical, slightly longer than wide, LP/WP 1.05, with the following scaly markings: 1) transverse line of scales slightly before the middle circumsribing prothorax; 2) longitudinal line on each dorso­lateral parts from medial part to dorsal edge of prothorax; 3) lagre scally patch on vantral part; dorsal part finely punctured, slightly pubescent; widest at the middle, in dorsal contour narrowest along apical margin, increased to widest midline, then rounded and decreased to basal 1/5, straight to basal margin.

Elytra sub­lanceolate, intervals smooth, very slightly punctured, without pubescence except apex with short light hairs; widest in the middle; in dorsal contour increased from basal margin to widest middle, rounded and decreased to apical 1/2 and more strongly decreased to extended apex; each elytron with the following scaly markings: 1) longitudinal line of scales from interval III to IV, slightly wider at base, decreasing in apical direction, from basal margin to basal 1/2; 2) longitudinal line of scales along lateral edge in all length; 3) irregular, cloud­like shape patch on medial part of elytra, from suture to lateral edge in width and from basal 3/4 to apical 1/ 2 in length, patch bare in the middle; 4) longitudinal line from middle on interval II to interval III from apical 1/2 to apex; LE/WE: 1.41; nearly twice as wide as prothorax, WE/WP: 1.89; more than two times as long as prothorax, LE/LP: 2.54.

Front coxa with fine patch of scales, slightly pubescent; each femora with fine patch of scales on apical part along internal margin, without pubescence, with short light hairs along outer margin; front tibia with short light hairs in all length and longer hairs along internal margin and apical part; mid and hind tibia with long, dense golden hairs along internal margin.

Aedegal body as shown in Fig. 2A–C . Female. Measurements: LB: 13.9; LP: 3.6; LE: 10.2; WE: 7.9; WP: 4.0; LR: 2.4; WR: 1.9. N=1 for all measurements. Elytra signifficantly wider than male, apex more strongly extended, with two peaks; LE/WE 1.29; scale colour brighter, with ogange and yellow scales. Dorsal habitus as shown in Fig. 1B . Genitalia as shown in Fig. 2D–F .

Differential analyses. T. nubes sp. nov. in general appearance is similar to T. hieroglyphicus Schultze, 1917 from the same Benguet province. The new species are easyly distinguishable by the following features: 1) different pronotal markings: dorsal transverse line is wider and not interrupted in medial part in new species, but narrower and medially interrupted in T. hierogliphicus ; 2) different elytral markings: longitudinal line along interval II in new species is interrupted by large cloud­like spot, the new species also lack longitudinal line on dorso­lateral part of each elytron, while markings on elytra of T. hierogliphicus are solid in all length; 3) bigger eyes in P. nubes ; 4) different shape of aedegal body, with more curved apical opening in T. hierogliphicus .

Distribution. Luzon Island, Barlig, Bontoc.

Etymology. The new species is named after its cloud­like scally markings on the elytra. Cloud on Latin­nubes.

Figures

Figure 1. Trichomacrocyrtus nubes sp. nov. A – Holotype male, dorsal view. B – paratype female, dorsal view.

Figure 2. A–C. Male genitalia of Trichomacrocyrtus nubes sp. nov. A – aedeagus in lateral view, B – aedeagus in dorsal view, C – sternite IX in dorsal view; D–E. Female genitalia of Trichomacrocyrtus nubes sp. nov., D – sternite VIII in ventral view, E – ovipositor in dorsal view, F – spermatheca.