Polycatus jaegeri Bramanti & Bramanti, sp., 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 : 66-69

2. Polycatus jaegeri Bramanti & Bramanti, sp.

nov. ( Fig. 3 , 10 , 11 , 1 )

Type material. Holotype, Male ( Fig.3.1-5 ): Philippines: Mindanao Isl. / Zamboanga del Norte prov., Gutalac , / II.2019, local collector leg. (white label) ; ‘’ HOLOTYPE / Polycatus jaegeri Bramanti & Bramanti’’ (red label) ( BRAA) .

Paratypes (22 males, 14 females): 3 males, 1female. Philippines / Mindanao Isl. / Gutalac , XI. 2018 / local collector leg.; 1 male, 2 females, same as previous, but II. 2019; 3 males, 2 females same as previous, but III. 2019; 1 male, 1 female, same as previous, but VI. 2019; 1 male, Philippines: Mindanao Isl. / Zamboanga del Norte prov., Siocon / local collector leg .; 1 male, 2 females, same as previous, but V. 2019; 1 male, same as previous, but IX. 2019 (all on white rectangular label, all in BRAA) ; 1 male, PHILIPPINES / Mindanao, Zamboanga / Gutalac / X. 2015 / local collector leg.; 4 females, same as previous, but IX. 2016; 5 males, PHILIPPINES / Mindanao, Zamboanga, Gutalac / IX. 2018 / local collector leg.; 3 males, 1 female, same as previous, but X. 2018; 1 female, PHILIPPINES / Mindanao, Zamboanga, Siocon / II. 2019 / local collector leg. (all on white rectangular labels, all in DUBC). All with additional red label: ‘’ PARATYPE / Polycatus jaegeri Bramanti & Bramanti’’.

Distribution. Mindanao Isl., Zamboanga del Norte prov. ( Fig. 10 ).

Description. Measurements (n=3): LB: 10.6-12.3 (holotype 12.3; mean 11.45); LR: 2.6-2.65 (holotype 2.65; mean 2.6); WR: 1.3-2.35 (holotype 2.35; mean 1.8); LP: 3.4-4.0 (holotype 4.0; mean 3.7; WP: 3.25-3.45 (holotype 3.45; mean 3.35); LE: 8.0-9.45 (holotype 8.0; mean 8.7); WE: 4.15-5.55 (holotype 5.55; mean 4.8).

Body black, shiny, with markings of bright red to orange round to recumbent scales on elytra, pale orange scally markings on pronotum and metallic blue to green on legs, underside less shiny, with pale orange and metallic blue markings. Head strongly punctured except for occipital area. Eyes large, strongly prominent from the outline of head. Forehead weakly bulging dorsally, three times as wide as eye. Rostrum twice as long as head, slightly longer than wide (LR/WR 1.13) dorsally with deep longitudinal medial groove from base of forehead to apical ½, sparse dark hairs on basal part; moderate triangular impression on apical part; laterally covered with metallic blue scales under eyes and metallic green scales on pregenae; long light brown hairs on apical part, hairs more dense near apex; underside with few metallic blue scales; antennal scrobe interrupted just before anterior edge of eye. Antenna covered with white rosy scales; antennal scape covered with dark hairs arranged in longitudinal rows; antennomeres with dark hairs on apical part; basal antennomere 1.5 times as long as wide, shorter than antennomere II; antennomere II 2.5 times as long as wide, two times longer than III-VIII; III- VII subequal in size, same length and width; club narrowed at base, widest at apical ½, nearly 2.5 times as long as wide. Prothorax nearly smooth, subspherical, with very fine punctation very gently punctured, longer than wide (LP/WP 1.16), anterior edge straight, posterior edge slightly curved medially; with the following markings: 1) transverse line along apical margin; 2) transverse line along basal margin, line medially with peak; 3) patch on each latero-ventral part, patch connected with apical and basal transverse lines; 4) ventral part completely covered with single scales; in dorsal contour widest at apical 1/2,

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

narrowed to just after the middle and minutely widened to base. Elytra slender, LE/WE 1.44, with strongly expressed intervals of deep rows of punctures, puncture corresponds by short hairs along basal half and longer, dark hairs along apical half; each elytron with the following markings: 1) suboval, transverse patch on basal half, from middle of interval II to lateral margin; 2) suboval, apically incurved transverse patch on apical half, from middle of interval II to lateral margin; 3) hair-like scale line along lateral margin from middle to apex; in dorsal contour widest just in the middle; LE/LP 2.0, WE/WP 1.61; metasternum completely covered with pale orange scales; ventrite I with metallic blue and pale orange scales on central part; II completely covered with pale orange scales; III-IV with rare metallic blue scales on lateral parts; V with metallic scales on central part; short, light hairs on all ventrites, hairs distinctly denser on ventrite V. Coxa covered with metallic scales of various colour; femur with metallic blue single scales, mingled with short light hairs; entire length of tibia with long dark hairs, metallic scales along internal margin. Aedeagus as in Fig. 3.11 -14.

Female. Measurements (n=3): LB: 14.45-15.85 (mean 14.9); LR: 3.6-4.1 (mean 3.9); WR: 1.8-2.8 (mean 2.2); LP: 3.35-4.2 (mean 3.9); WP: 3.4-4.0 (mean 3.7); LE: 11.0-11.5 (mean 11.2); WE: 6.0- 7.75 (mean 7.0). Larger, elytra wider, LE/WE 1.6, apex of elytra more strongly narrowed. Each elytron with three spots of scales, one on basal half, one just after the middle and one on apical half, other as in males ( Fig. 3.6-10 ).

Differential analyses. Polycatus jaegeri sp. nov. is similar to P. aurofasciatus Heller, 1912 from Basilan Island by the large, strongly prominent eyes and large, V shaped scutellum. Both species also share similarly located scally spots on elytra, but species may be distinguished by the following characters: 1) prothorax of P. aurofasciatus with more rough puncture, less convex than in P. jaegeri sp. nov.; 2) impression on apical part of rostrum much deeper in P. aurofasciatus ; 3) bright red scally markings on elytra and bright orange markings on prothorax in P. jaegeri sp. nov., and pinkish markings on both elytra and prothorax in P. aurofasciatus .

Etymology. The species is dedicated to Olaf Jäger (Dresden), who allowed us to study types of Polycatus described by K.M. Heller and W. Schultze in the past century.

Mimicry. This new species is involved into the following mimicry complex: Polycatus jaegeri – Pachyrhynchus zamboanganus – Metapocyrtus sp. – Calidiopsis speciosa ( Fig. 11.1-4 ).

Figures

Fig. 3. P. jaegeri sp. nov. (BRAA). 1-5 male; 6-10 female; 11 – aedegal body in ventral view; 12- aedegal body in lateral view; 13 - aedegal body in dorsal view; 14 – sternite IX; 15 – sternite VIII; 16 – spermatheca

Fig. 10. Distribution map of studied Polycatus species

Fig. 11: 1 – P. jaegeri sp. nov.; 2 – Pachyrhynchus zamboanganus Yoshitake, 2012; 3 – Metapocyrtus sp.; 4 – Calidiopsis speciosa Heller, 1913; 5 – P. mimicus sp. nov.; 6 – Pachyrhynchus tikoi Rukmane, 2016; 7 – P. bramanti sp. nov.; 8 – Pachyrhynchus subamabilis Yoshitake, 2012

Fig. 1. TYPE specimens of P. aurofasciatus (MTD). 1-5 male; 6-10 female; 11 – aedegal body in ventral view; 12- aedegal body in lateral view; 13 - aedegal body in dorsal view; 14 – sternite IX; 15 – sternite VIII; 16 – spermatheca

Fig. 4. P. opulentus (MTD). 1-5 female; 6 – sternite VIII; 7 – spermatheca

Fig. 5. P. vivesi sp. nov. (BRAA). 1-5 male; 6-10 female; 11- aedegal body in lateral view; 12 – aedegal body in dorsal view; 13 – sternite IX; 14 – aedegal body in ventral view; 15 – spermatheca; 16 – ovipositor; 17 – ventrite VIII