Pachyrhynchus bollinoi, 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 : 180-183

Pachyrhynchus bollinoi sp. nov.

Fig. 1 A-B, 2A-E, 3A-C

Type material. Holotype: Male : ‘’ PHILIPPINES / Luzon , Mt. Province, Barlig / VII. 2018 / local collector leg.’’ (white rectangular label) ; ‘’ HOLOTYPE / Pachyrhynchus bollinoi / Rukmane-Bārbale, 2020 / (red rectangular label).

Paratypes (16 males, 5 females): 1 male: ‘’ PHILIPPINES / N Luzon, Mt. Province , Barlig / IX. 2015 / local collector leg.’’; 1 male, 2 female, same label, but XI. 2015; 3 male, 1 female, same label, but VII. 2016; 3 male, same label, but IV. 2017; 1 male, same label, but VII. 2017; 1 male, same label, but X. 2017; 1 male, same label, but VII. 2018; 1 male: ‘’ PHILIPPINES / N Luzon, Nueva Vizcaya, Kayapa / XI. 2015 / local collector leg.; 1 male: ‘’ PHILIPPINES / N Luzon, Ifugao, Banaue / VI. 2016 / local collector leg.; 2 female, same label, but VII. 2016; 1 male, 1 female, same label, but IX. 2016; 1 male, same label, but X. 2017.All on white rectangular labels, with additional red label: ‘’ PARATYPE / Pachyrhynchus bollinoi / Rukmane-Bārbale, 2020/.

Distribution. Luzon Island.

Description. Male.Measurements (n=6): LB: 12.7- 13.8 (holotype 12.7, mean 13.12); LR: 1.8-2 (holotype 1.9, mean 1.9); WR: 2-2.2 (holotype 2.1, mean 2.1); LP: 3.8-4.5 (holotype 4.4, mean 4.15); WP: 3.8-4.2 (holotype 4.2, mean 4.03); LE: 8.5-9 (holotype 8.5, mean 8.75); WE: 5.1-5.8 (holotype 5.3, mean 5.53).

Body black, surface strongly shiny, except underside with weaker luster. Body elongated, with opaque blue markings of round to elliptic recumbent scales.

Head sparsely very minutely pubescent, without scally markings, minutely punctured; each side laterally covered with short blue to silver hair-like scales on genea and behind antennal scrobe, and covered with silver long hair-like scales before the scrobe. Forehead flattish, nearly three times as wide as eye width; eyes relatively small, slightly prominent from outline of the head; outline of each eye highest just in the middle. Rostrum slightly wider than long (WR/LR 1.1); dorsum with fine puncture, with deep sub-triangular impression on basal part, weakly bulging on apical part; dorsal contour of rostrum nearly strainght in basal part, weakly increased to apical part. Antennae slender, mingled with long silver hairs on all antennomers and apical half of scrobe; antennomers I-II slightly longer than wide, longer than III-VII; III-VII subequal in length, nearly as long as wide; club sub-oval, nearly twice as long as wide.

Prothorax with the following six scally markings: 1) two spots on disc from behind the middle to apical ½ each redirected laterally; 2) one roundish spot at each latero-basal edge of disc; 3) broad lateroventral stripe on each side. Prothorax nearl same longht and width (LP/WP 1.03); dorsum minutely punctured; dorsal contour highest at the basal ½; sides gently raised from constricted base, widest at basal ½ then gently convergent apicad to apical ½, then slightly widened to apex; apical margin straight, basal margin curved.

Each elytron with the following ten scaly markings: 1) two big ovate patches on basal ½; 2) big ovate patch just before the middle, redirected laterally; 3) two small round patches on median part; 3) two sutural patches – one sub-medial, one near apex; 4) two big ovate patches on apical part; 5) subtriangular patch near apex redirected laterally. Elytra without pubescence in general, with short rare hairs along the apex. LE/WE 1.58, wider than prothorax (WE/WP 1.37), more than twice as long as prothorax (LE/LP 2.11), smooth, without puncture intervals; dorsum moderately con-

Rukmane-Bārbale A.

vex; dorsal contour highest at the middle; sides gradually raised from base, widest just in the middle, then narrowed to apiocal area and nearly straight to apex.

Hind femora with opaque blue roundish scale line along inner margin. Mid and fore femora with roundish patch of scales along apical impression. Tibiae with long hairs at base and internal margins, mingled with short hairs in all length.

Genitalia as illustrated (2A-E), endophallus as illustrated (3A-C).

Female. Measurements (n=5): LB: 14.9-16.1 (mean 15.58); LR: 2.1-2.3 (mean 2.2); WR: 2.2- 2.4 (mean 2.3); LP: 4.3-4.8 (mean 4.48); WP: 4.4-4.9 (mean 4.66); LE: 10.5-11.5 (mean 11.02); WE: 7-7.9 (mean 7.42). Elytra more strongly convex dorsally, much wider than in males.

Differential analyses. Pachyrhynchus bollinoi sp. nov. from the first view might be confused with Pachyrhynchus pinorum species complex by elytral scally markings and shape of apiocal area, but judging by the shape of everted endophallus species are distinct: in lateral view first and second ventral growth as well as two lateral growths are much smaller in P. bollinoi sp. nov. ( Fig. 3.1- 3.2). Additionally, species within Pachyrhynchus pinorum species complex have markings at apical part of the disc medially, while P. bollinoi sp. nov. lack any scally markings on apical part of the disc, but have four scally spots on disc, two just after the middle each redirected laterally and one along each latero-basal part of the disc. This feature is common for two more species: P. tetramaculatus Rukmane, 2019 and P. cinereomaculatus sp. nov.. Toghether with different eltral ornamentation, P. tetramaculatus Rukmane, 2019 have narrower apiocal area in both sexes, as well as widened elytra along apical 1/3 to ½; on contrary elytra of P. cinereomaculatus sp. nov. is strongly widened along the middle, feature is more strongly expressed in females

( P. bollinoi sp. nov. LE/WE 1.49; P. cinereomaculatus sp. nov. LE/WE 1.27).

Etymology. The new species was dedicated to brilliant specialist in the field of entomology, person who was first to use eversion technology for the genus Pachyrhynchus , also to amazing colleague and friend Dr. Maurizio Bollino (Lecce, Italy), as an appreciation of his immeasurable contribution to study of the genus.