Pachyrhynchus pseudhalconensis, 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 : 85-88

Pachyrhynchus pseudhalconensis sp. n.

( Fig. 6 ).

Type material. Holotype, Male: ‘’ Philippines, Mindoro Isl., Puerto Galera , IX. 2014, local collector leg. (typed on white card); [ex. Prof. A. Barševskis coll.] (typed on white card); ‘’HOLOTYPE / Pachyrhynchus pseudhalconensis / Rukmane 2016 / det. Rukmane 2016 (typed on red card) ( DUBC).

Paratypes (27. exs.): 9 males: Philippines, Mindanao Isl., Bukidnon, Cabanglasan, 1 male., VIII. 2013, local collector leg.; 4 males., VII. 2014., local collector leg.; 2 males., XI. 2015, local collector leg.; 1 male., XII. 2015, local collector leg.; 1 male., V. 2016, local collector leg.; 2 females., VII. 2014, local collector leg.; 1 female., XI. 2014, local collector leg.; 1 female., X. 2015, local collector leg.; 1 female., XI. 2015, local collector leg.08. 2013 (1), 07. 2014 (4), 11. 2015 (2), 12. 2015 (1), 05. 2016 (1), local collector leg. [ex. Prof. A. Barševskis coll.]; 5 females: Philippines, Mindanao Isl., Bukidnon, Cabanglasan, 07. 2014 (2), 11. 2014 (1), 10. 2015 (1), 11. 2015 (1), local collector leg. [ex. Prof. A. Barševskis coll.] (all in DUBC). All paratypes with additional red rectangular printed label: ‘’ PARATYPE / Pachyrhynchus pseudhalconensitikois / Rukmane 2016 / det. Rukmane 2016 ’’.

Distribution: Philippines, Mindoro Island.

Description. Measurements (n=5): LB: 16.0 (mean 15.08); LE: 9.5 (mean 8.68); WE: 5.7 (mean 5.96); LP: 4.3 (mean 3.76); WP: 4.3 (mean 4.14); LR: 2.2 (mean 1.82); WR: 2.0 (mean 1.86). Habitus as in Fig. 6A ; laterally as in Fig. 6D .

Body and legs black, slightly shiny; body surface with pale green or orange scale spots, two paratypes with yellow scales, two paratypes with orange scales. Head black, between eyes with wide romb-shaped band of pale scales (one paratype without this band). Head under eyes laterally and on lateral sides of rostum with pale scales and with long green, apical brown setae. Apical bulge of rostum flattened. Basal part of rostrum with strong impression and median groove, without scales, lower edge of rostrum extended. Antenna black, with small antennomeres. Antennal scape short and stout, strongly clavate; remaining antennomeres small, with sparse short pubescence and long setae; apical antennomere club-shaped, covered with very fine pubescence.

Pronotum subspherical, slightly flattened, widest in middle, with very fine, sparse punctation, green, shiny scales splitting on lateral sides of pronotum, circumscribe two bare black spots on lateral sides and one number eight shape bare spot in middle of pronotum.

Elytra with longitudinal and transverse stripes of pale scales. Each elytron with three longitudinal stripes extendingfrom basal margin to median portion: 1) first stripe from interval II to interval III, in basal part with squere spahe scale margin; 2) second stripe from interval V to interval VI; 3) third stripe on lateral margin of elytra. Two transverse stripes of shiny green scales: 1) on basal margin of elytra; 2) on median portion of elytra. Three longitudinal stripes from median portion of elytra to apical margin: 1) first stripe from interval II to interval IV inculding; 2) second stripe from interval V to interval VI; 3) third stripe on lateral margin of elytra, second and third stripes are connected in median portion of stripes with band of shiny green scales.

Legs with strongly clavate femori. Tibiae serrate along internal margins, incurved apically. Middle and hind femori covered with short setae and scales along posterior margins. Tibiae with sparse pubescence, mingled with long setae. Tarsomeres black, covered by sparse brown pubescence.

Aedeagus curved in lateral view. Lamella short, slightly rounded apically ( Fig. 7G, H ).

Differential diagnosis. Pachyrhynchus pseudhalconensis sp. n. is similar in general appearance to P. halconensis Schultze, 1922 and P. domino sp. n., which have different scale pattern (Differences from P. halconensis : transverse stripe on basal margiņ, transverse stripe on median portion of elytra of P. pseudhalconensis sp. n. is straight, lack of longitudinal stripe on basal median part of elytra, median portion number eight shape bare spot; Differences from P. domino : lack of apical median portion and basal median portion spots on elyrons, lack of median spot of elytra, pronotum without triangular shape scale spots on basal and apical margins) (Elytral differences appear in Fig. 6B, C, E, F . 1 ) and shape of aedeagus (according to sheme from Schultze, 1923). The new species differs from compared congeners by the shape of female genitalia ( Fig. 7D, E, F ), which is longer and narrower than P. halconensis , but shorter and wider than P. domino sp. n.. Basal impression of rostrum without scales, more narrow than P. halconensis and less narrow than P. domino , lower edge of rostrum more extended( Fig. 7A, C ). Eyes bigger, located closer to forehead. Mimicry. P. pseudhalconensis sp. n., same as P. domino sp. n. and P. halconensis is mimics by beetle D. halconensis Vives, 2012 , with wich it coexsists.

Etymology. The species name means false halconensis .

Figures

Fig. 6. A, D: Pachyrhynchus pseudhalconensis sp. n. dorsal and lateral view; B, E: Pachyrhynchus domino sp. n. dorsal and lateral view; C, F: Pachyrhynchus halconensis Schultze, 1922 dorsal and lateral view.

Fig. 7. A: Pachyrhynchus pseudhalconensis sp. n. rostum in dorsal view, D:apex of ovipositor in dorsal view, G, H: male aedeagus; B: Pachyrhynchus domino sp. n. shape of rostum in dorsal view, E: apex of ovipositor in dorsal view; C: Pachyrhynchus halconensis Schultze, 1922 shape of rostum in dorsal view, F: apex of ovipositor in dorsal view.

Fig. 1. Habitus of Pachyrhynchus tikoi sp. n.: dorsal (A) and lateral (B) view; D, E: aedeagus of P. tikoi: lateral (E) and dorsal view; C: habitus of Doliops valainisi Barševskis 2013, dorsal view.