Pachyrhynchus cinereomaculatus, Rukmane-Bārbale, 2020

Rukmane-Bārbale, Anita, 2020, Two new species of the genus Pachyrhynchus Germar, 1824 (Curculionidae: Entiminae: Pachyrhynchini) from the Luzon Island, Philippines, Baltic Journal of Coleopterology 20 (2), pp. 179-184 : 183-184

Pachyrhynchus cinereomaculatus sp. nov.

Fig. 1 C-D, 2F-I

Type material. Holotype: Male: ‘’ PHILIPPINES / N Luzon, Ifugao, Banaue / VIII. 2016 / local collector leg.’’ (white rectangular label) ; ‘’ HOLOTYPE / Pachyrhynchus cinereomaculatus / Rukmane-Bārbale, 2020 / (red rectangular label).

Paratypes (2 females): 1 female: ‘’ PHILIPPINES, Luzon / Nueva Vizcaya, Kasibu / X. 2012 / local collector leg.’’ ; 1 female: ‘’ PHILIPPINES, Luzon / Aurora, V. 2014 / local collector leg.’’ (both on white rectangular labels). With additional red label : ‘’ PARATYPE / Pachyrhynchus cinereomaculatus / Rukmane-Bārbale, 2020 /

Distribution. Luzon Island.

Description. Male. Measurements (n=1): LB: 13.0; LR: 1.9; WR: 2.2; LP: 4.5; WP: 4.0; LE: 8.6; WE: 6.5.

Body black, shiny, with light grey to silver markings of round to elliptic recumbent scales.

Head nearly without pubescence, dorsally without markings. Horehead more than three times as wide as eye width; eyes small, nearly not prominent from outline of the head; outline of each eye highest just before the middle. Rostrum slightly wider than long (WR/LR 1.16); dorsum nearly without puncture, with sub-otriangular impression on basal half, apical half flattish; dorsal contour of rostrum nearly straight in basal half, slightly decreased to apical half. Antennae mingled with rare silver hairs; antennomer I longer than II, 2 times as long as wide; antennomer II 1.5 times as long as wide, longer than III-VII;

Rukmane-Bārbale A.

antennomers III-VII subequal in length, slightly wider than long; club nearly 2.5 times as long as wide.

Prothorax with the following six scally markings: 1) two elongated empty spots on disc at median part, each redirected laterally; 2) one triangular empty spot at each latero-basal edge of disc; 3) broad lateroventral stripe on each side. LP/WP 1.13; dorsal contour highest just before the middle; sides minutely raised from constricted base, then widest just before the middle, then gently convergent apicad to apical 1/3, then slightly widened to apex.

Each elytron with the following empty scale patches: 1) two round patches on basal ½; 2) three ovate patches at median part, displayed in transverse row from just after the suture to lateral margin; 3) two round patches on apical part; 4) two sutural patches, one just after the middle, one just before the apex; 5) one more patch laterally near apex; All patches of proximately same size except smaller sutural patches. E;ytra wery smooth, without punctured intervals. LE/WE 1.32, wider than prothorax (WE/WP 1.63), LE/LP 1.91; dorsal contour highest at the middle; sides gradually raised from base, widest just in the middle, then narrowed to apiocal area and rounded to apex.

Genitalia as illustrated (2F-I).

Female. Measurements (n=2): LB: 15.2-15.7 (mean 15.45); LR: 2.1-2.3 (mean 2.2); WR: 2.2-2.3 (mean 2.25); LP: 4.5-4.7 (mean 4.6); WP: 4.6-4.8 (mean 4.7); LE: 11.5-11.9 (mean 11.7); WE: 9.1-9.3 (mean 9.2). Elytra very strongly convex in dorsal contour, otherwise essentially as in males.

Etymology. Species name is Latinised adjective of grey circles on body.