Pachyrhynchus tetramaculatus, Rukmane, 2019

Rukmane, Anita, 2019, Four new species and two subspecies of the genus Pachyrhynchus Germar, 1824 (Coleoptera: Curculionidae: Pachyrhynchini) from Luzon Island, Philippines, Baltic Journal of Coleopterology 19 (2), pp. 141-150 : 143-144

Pachyrhynchus tetramaculatus sp. nov.

Fig. 1 A-B, 4L-M.

Type material. Holotype. Male. ‘’ PHILIPPINES / Luzon , Nueva Vizcaya, Quezon / VI. 2018 / local collector leg.’’ (white rectangular label, printed) ; ‘’ HOLOTYPE / Pachyrhynchus tetramaculatus / Rukmane, 2019 / det. Rukmane A. 2019’’ (red rectangular label, printed).

Female. Paratype. Same label as holotype. ‘’ PARATYPE / Pachyrhynchus tetramaculatus / Rukmane, 2019 / det. Rukmane A. 2019’’ (red rectangular label, printed).

Distribution: Luzon Island, Nueva Vizcaya Province.

Description. Dimensions (holotype): LB: 13.9; LE: 8.8; WE: 5.3; LP: 3.9; WP: 3.7; LR: 2.0; WR: 1.9.

Integument black, strongly shiny, pronotum, head and legs shiny, underside with weaker luster; body with pale orange to yellow round recumbent scales; genae, coxa and femori with pale orange, yellow and shimmery green scales. Dorsal habitus as shown in Fig. 1 A-B.

Rostrum slightly wider than long (LR/WR 1.05), slightly pubescent, bulging on apical part, with peak slightly before middle, ovate-triangular impression on basal half, weak longitudinal groove from middle to base of the forehead, two bulges on basal 1/3 and weak transverse impression on base; laterally with patch of round scaled on genae; few pubescence before antennal scrobes and long light hairs after antennal scrobes, with longer hairs near apex; antennomers mingled with long light hairs, scape covered with pubescence on basal part and few light hairs on apical part dorsally; pedicel and first antennomer sub equal in length, longer than wide, antennomers II-V subsphereical, sub equal in length. Head glabrous, finely punctured; eyes moderate, weakly prominent from the outline of the head. Forehead flat, more than two times as wide as eye width.

Prothorax sub spherical, longer than wide (LP/ WP 1.05), widest at apical 1/2; weakly punctured; with the following markings of pale orange to yellow scales: 1) two roundish patches on disc laterally along apical margin; two ovate patches on basal part of the disc, redirected laterally; ovate patch on each latero-dorsal part; dorsal contour increased from moderate apex to peak at apical ½, then firmly rounded and decreased to just after the midline; then decreased strongly, with curve, sub basal margin slightly widened.

Legs stout; coxa patch of orange and shimmery green round scales; femur mingled with sparse pubescence and patch of scales on apical part along internal margin; tibiae incurved apically, covered with pubescence on all length and long light hairs on internal margin, with mucrones on all legs; tarsus with long, golden setae.

Elytra sub ovate (LE/WE 1.66), with weakly pronounced intervals, nearly smooth; each elytron with the following scaly markings: 1) two ovate patches on basal ½; 2) four ovate spots on medial part; 3) two sutural patches – one sub medial, one near apex; 4) three ovate patches on apical part 5) triangular apical patch along apex; widest just in the middle; on dorsal dimension narrow at the base, gradually increases to middle, widest just in the middle, then roundish and

Rukmane A.

gradually decreases to apex up to apical 1/3 where narrows more strongly in direction to apex; apex rounded, with weak pubescence.

Elytra wider than prothorax (WE/WP 1.43), more than twice as long as prothorax (LE/LP 2.26). Genitalia as shown in Fig. 4 L-M.

Female. Dimensions: LB: 15.3; LE: 10.3; WE: 7.4; LP: 4.7; WP: 4.3; LR: 2.1; WR: 2.4. Larger than male. Elytra more wide and more strongly rounded, as well as more strongly elongate apically.

Figures

Fig. 1. Dorsal habitus of the following species: A – P. tetramaculatus sp. nov. male; B – P. tetramaculatus sp. nov. female; C – P.sagittatus sp. nov. male; D – P. kirklayroni sp. nov. male; P. congestus ssp. aedamlayroni subsp. nov. male; E - P.congestus ssp. aedamlayroni subsp. nov female

Fig. 4. A, C, H, J, L – aedeagus in lateral view; B, D, I, K, M – aedeagus in ventral view; A, B – P.disargus sp. nov.; C, D – P.congestus ssp. aedamlayroni subsp. nov.; H, I – P.kirklayroni sp. nov.; J, K – P.sagittatus sp. nov.; L, M – P.tetramaculatus sp.nov.; E, F, G – female genitalia of P.phaleratus ssp. dannylayroni subsp. nov.; E – sternite VIII in ventral view; F – ovipositor in dorsal view; G – spermatheca. Scale bar 1.00 mm