Pachyrhynchus rebus, Rukmane, 2016

Rukmane, Anita, 2016, Six New Species Of The Genus Pachyrhynchus Germar, 1824 (Coleoptera: Curculionidae) From The Philippines, Acta Biologica Universitatis Daugavpiliensis 16 (1), pp. 77-89 : 84-85

Pachyrhynchus rebus sp. n.

( Fig. 5 )

Type material. Holotype, Male: ‘’ Philippines, East Luzon, Quirino, Nagtipunan, IX. 2014, local collector leg.’’ (typed on white card); [ex. Prof. A.Barševskis coll.] (typed on white card); HOLOTYPE / Pachyrhynchus rebus / Rukmane 2016 / Det. Rukmane 2016 (typed on red card) ( DUBC).

Distribution: Philippines: Luzon Island.

Description. Measurements: LB: 10.7; LE: 6.2; WE: 4.5; LP: 3.6; WP: 3.8; LR: 1.3; WR: 1.4. Habitus as in Fig 5A ; laterally as in Fig. 5B .

Body and legs black, shiny, body surface with pale green, yellow, orange and blue scales. Head black, with yellow scales under each eye laterally and genae. Eyes slightly convex, black. Head between eyes without spots of pale scales.Apical bulge of rostum convex, without punctation. Each side of rostrum covered with small, oval and round scales. Basal part of rostrum with oblong depression and indistinct median groove.Antenna black, with small antennomeres. Antennal scape short and stout; remaining antennomeres small, with short sparse pubescece and long setae; apical antennomere club-shaped, covered with very fine pubescence.

Pronotum subspherical, slightly flattened, widest in median portion, with very fine, sparse punctation, in middle with tansversal line of pale yellow and golden scalescircumscribes two bare black spots laterally. Longitudinal line of pale yellow and golden scales, crossing transverse line in middle and with triangular band of scales in apical margin of pronotum.

Elytra with reticulate net-shaped stripes of pale yellow, golden, green and blue scales, forming seven irregular, isolated, black, bare spots, and

eight full scally spots. Intervals of elytra smooth, with coarse punctures and slightly impressed rows.

Legs massive, wide, with strongly clavate femori. Tibiae serrate along internal margins, strongly incurved apically. Middle and hind femori thinly covered with short setae and hair-like scales along posterior margins. Tibiae with small pubescence, mingled with long setae.

Scutellum small, apically rounded.

Aedeagus long, in lateral view incurved. Lamella subtriangular, apically rounded ( Fig. 5E, F ).

Differential diagnosis. Pachyrhynchus rebus sp. n. is similair in general appearance to P. orbifer Waterhouse, 1841 . The new species is easily distinguished from P. orbifer by the shape of aedeagus which is longer, narrower and more incurved leteraly ( Fig. 5G, H ) and external morphological characters: 1) pronotum and legs of P. rebus sp. n. is more wide and massive; 2) lack of scales on head between eyes 3) different scale margins on pronotum whith one narrow transverse and one narrow longitudinal line of scales, while lines on pronotum of P. robifer are more wide and with additional transwerse line on apical margiņ ( Fig. 5C, D ).

Mimicry: P. rebus sp. n. and P. orbifer , are mimics by D. magnifica Heller, 1823 with which they are coexists.

Etymology. The name of new species is derieved from unical scale margins on elytra reminding puzzle.

Figures

Fig. 5. A, B: Pachyrhynchus rebus sp. n. dorsal and lateral wievs, E, F: aedeagus dorsal and lateral wievs; C, D: Pachyrhynchus orbifer Waterhouse 1841 dorsal and lateral view, G, H: aedeagus dorsal and lateral view.