Polycatus waoensis Bramanti & Bramanti, 2020

Bramanti, Alessandro, Bramanti, Andrea & Bārbale, Anita Rukmane -, 2020, Five new species of the genus Polycatus Heller, 1912 (Coleoptera: Curculionidae: Polycatini) from the Mindanao Island (Philippines), and new examples of mimicry among weevil genera, Baltic Journal of Coleopterology 20 (1), pp. 61-80 : 75-77

7. Polycatus waoensis Bramanti & Bramanti

sp. nov. ( Fig. 9 , 10 )

Type material. Holotype, Male ( Fig.9.1-5 ): PHILIPPINES / Mindanao, Lanao del Sur, Wao / XII. 2017 / local collector leg. (white label) ; ‘’ HOLOTYPE / Polycatus waoensis / Bramanti & Bramanti (red label) ( BRAA) .

Paratypes (27 males, 17 females): 1male, PHILIPPINES / Mindanao, Lanao del Sur, Wao / IV.2016 / local collector leg.; 1 female, same data, but IX. 2016 ; 1 male, same data, but X. 2016 ; 2 males, 1 female, same data, but XII. 2016 ; 2 males, 1 female, same data, but II. 2017 ; 1 male, 1 female, same data, but XI. 2019 (all in DUBC) ; 1 male, Philippines, Mindanao / Lanao del Sur, Wao / II. 2017 / local collector leg.; 1 male, same data, but III. 2017 ; 2 males, same data, but XI. 2017 ; 2 males, 3 females, same data, but XII. 2017 ; 1 male, same data, but I. 2018 ; 2 males, 4 females, same data, but I. 2020 ; 3 males, 1 female, same data, but II. 2020 ; 2 males, 1 female, Philippines, Mindanao / N Cotabato, Alamada / XII. 2018 / local collector leg.; 1 male, Philippines, Mindanao / N Cotabato, Alamada , Dado / III. 2019 / local collector leg.; 1 male, same data, but VII. 2019 ; 4 males, 3 females, same data, but I. 2020 ; 1 male, 1female, same data ,

Bramanti A., Bramanti A., Rukmane - Bārbale A.

but II. 2020 (all in BRAA). All with additional red label: ‘’ PARATYPE / Polycatus waoensis / Bramanti & Bramanti’ ’.

Distribution. Central Mindanao Island, Lanao del Sur, Wao ( Fig. 10 ).

Description. Measurements (n=6): LB: 11.3-12.9 (holotype 12.6; mean 11.97); LR: 2.4-3.65 (holotype 2.4; mean 3.14); WR: 1.15-2.0 (holotype 1.15; mean 1.43); LP: 2.95-4.4 (holotype 3.75; mean 3.6); WP: 2.9-3.9 (holotype 3.75; mean 3.42); LE: 7.9-9.9 (holotype 9.5; mean 9.13); WE: 4.1-6.35 (holotype 6.35; mean 5.32).

Body black, with markings of pale blue to green round to recumbent scales on elytra, yellowish on pronotum and coppery on head and rostrum. Head minutely punctured. Eyes large, prominent from outline of head, with peak just in the middle. Forehead with large dorsal bulge from basal ½ to middle of rostrum, 2.5 times as wide as eye width. Rostrum twice as long as wide (LR/WR 2.10), dorsally with longitudinal groove from base of forehead to apical third of rostrum; rostrum with small, subtriangular mediodorsal; in dorsal contour with strong medial concavity, ventral part strongly widened at apical part; laterally with patch of bright golden scales, that circumscribes each eye; genae with long, dark hairs. Head and rostrum covered with general scales of coppery colour, underside with deep medial groove, scales only on medial part; antennal scrobe reaching anterior edge of eye. Antenna without general scales; basal antennomere 1.5 times as long as wide, as long as antennomere II, II twice as long as wide; III-VI subequal in size, same length and width; VII 1.5 times as long as wide; club strongly narrowed from base to just before the middline, widest along apical 1/2, apex gradually narrowed. Prothorax with weak medial impression on disc; same length and width (LP/WP 1.0), posterior edge slightly incurved medially; with the following markings: 1) transverse, continuous line along apical margin, line narrowed in middle and gradually extended to latero-ventral parts; 2) transverse line along basal margin; 3) spot on medial part of basal margin; 4) longitudinal line on latero-ventral part; 5) ventral part with dense general scales; in dorsal contour widest just before the middle. Elytra distinctly rounded, LE/WE 1.5, rugose, with weakly expressed intervals of punctured rows, light brown hairs on apical half; each elytron with two more or less confluent scaly patches, each patch consists of various number of smaller, longitudinal or transverse patches, connected in various ways; in dorsal contour widest in middle; LE/LP 2.55, WE/WP 1.7; metasternum completely covered with general scales; ventrite I with patch of general scales on central part; II with large patch of general scales; III-IV with transverse line of metallic scales; V with small roundish patch centrally.Aedeagus as in Fig. 9.11 - 13.

Female. Measuremnts (n=3): LB: 14.55-15.35 (mean 14.9); LR: 2.75-3.7 (mean 3.23); WR: 1.6-2.0 (mean 1.78); LP: 4.1-5.2 (mean 4.77); WP: 3.7-4.0 (mean 3.88); LE: 11-11.9 (mean 11.32); WE: 6.85- 7.75 (mean 7.17). ( Fig. 9.6-10 ).

Differential analysis. The new species is similar to P. eupholoides , P. mimicus sp. nov., P. bramanti sp. nov. by it’s distinctly rounded elytra with moderately deep puncture rows (except P. bramanti sp. nov. with smooth elytra). The new species may be easily distinguished from P. eupholoides and P. mimicus sp. nov. by very large bulge on rostrum as well as unique scally markings on elytra. Differences between P. waoensis sp. nov. and P. bramanti sp. nov. see above.

Etymology. The specific epithet is the latinized adjective derived from the area the specimens were collected from.

Figures

Fig. 9. P. waoensis sp. nov. (BRAA). 1-5 male; 6-10 female; 11-13 aedegal body; 11 – sternite IX; 15 – sternite VIII; 16-17 spermatheca

Fig. 10. Distribution map of studied Polycatus species