Polycatus mimicus 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 : 74-75

6. Polycatus mimicus Bramanti, Bramanti &

Rukmane, sp. nov. ( Fig. 7 , 10 , 11 , 5 )

Type material. Holotype, Male ( Fig. 7.1-6 ): PHILIPPINES / Mindanao, Bukidnon, Cabanglasan / II.2016 / local collector leg. (white label) ; ‘’ HOLOTYPE / Polycatus mimicus / Bramanti, Bramanti & Rukmane’ ’ (red label) ( DUBC) .

Paratypes (2 females): 1 female, PHILIPPINES. Mindanao, Bukidnon, Mt. Kalatungan / V.2014 / local collector leg ( DUBC) ; 1 female, PHILIPPINES / Mindanao, Bukidnon, Cabanglasan ( BRAA). All with additional red label : ‘’ PARATYPE / Polycatus mimicus / Bramanti, Bramanti & Rukmane’’.

Distribution: Mindanao Island, Bukidnon prov.

( Fig. 10 ).

Description. Measurements (n=1): LB: 7.4; LR: 1.9; WR: 1.6; LP: 3.4; WP: 3.3; LE: 7.4; WE: 5.2.

Body black, elytra slightly shiny, with markings of pale green, yellowish and coppery round to recumbent scales on body. Head with indistinct punctation, together with rostrum covered with sparse coppery scales dorsally. Eyes medium-sized, apex just in the middle. Forehead bulging dorsally, nearly 2.5 times as wide as eye. Rostrum longer than wide, LR/WR: 1.19, with moderate medial longitudinal groove and oblong impression dorsally; laterally with markings of yellowish scales that circumscribe each eye and long, golden hairs on genae and near mouth; underside with markings of coppery scales, with two grooves, one longitudinal, one transverse. Antenna sparsely covered with pale coppery scales, mingled with long brown hairs. Prothorax with indistinct punctation, nearly same length and width (LP/WP: 1.03), in dorsal contour nearly straight, slightly widened along apical ½; anterior edge slightly curved, posterior edge slightly incurved; with the following scally markings: 1) transverse continuous scale line along apical margin; 2) roundish patch of scales on medial part of basal margin, patch interrupted by weak longitudinal groove on disc; 3) longitudinal patch on each latero-ventral part. Elytra short, LE/WE 1.42, intervals of puncture rows moderate, followed by short light brown hairs; each elytron with five longitudinal, continuous scale lines between intervals and one additional scale line along lateral margin, second and fifth line connected along apex; underside densely covered with yellowish scales, except ventrite III and IV with scally markings on apical half. Aedeagus as in Fig. 7.11 ,12,14.

Female (n=2). Measurements: LB: 10.2-10.6 (mean 10.4); LR: 1.6-2.0 (mean 1.8); WR: 2.2-2.4 (mean 2.3); LP: 3.2-4.0 (mean 3.6); WP: 4.0-4.4 (mean 4.2); LE: 10.2-10.6 (mean 10.4); WE: 7.2-8.2 (mean 7.7). Seven scally lines on each elytron, underside with narrow longitudinal patch on ventrite I and oblong transverse patch on ventrite II. Other as in males ( Fig. 7.6-10 ).

Differential analysis. This new species is similar to P. eupholoides by small eyes and scally markings on prothorax and legs, as well as longitudinal medial groove on prothorax; and to P. vivesi sp. nov. by short, minutely rounded elytra as well as scally markings on protrorax together with longitudinal medial groove, but can be easily distinguished by the following characters: 1) from both P. eupholoides and P. vivesi sp. nov. by unique elytral ornamentation, that consists of longitudinal continuous lines between punctured intervals; 2) eyes slightly larger than that in P. eupholoides ; 3) rostrum in dorsal contour widened along apical half in P. mimicus sp. nov. and nearly straight in P. eupholoides ; 4) prothorax of P. vivesi sp. nov. in lateral view nearly straight, with small bluge on sub-apical part, prothorax of P. mimicus sp. nov. with bulge from middle to apical part.

Etymology. This new species is named after the fact of the mimicry with Pachyrhynchus tikoi Rukmane, 2016 .

Mimicry. The new species is involved into mimicry complex with Pachyrhynchus tikoi Rukmane ( Fig. 11.5-6 ).

Five new species of the genus Polycatus Heller, 1912 ( Coleoptera : Curculionidae : Polycatini ) from the Mindanao...

Figures

Fig. 7. P. mimicus sp. nov. (DUBC). 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 – sternite VIII

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. 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