Metapocyrtus yoshitakei, Sandel & Bollino, 2018

Sandel, Franco & Bollino, Maurizio, 2018, Four New Species of Metapocyrtus Heller, 1912, from Mindoro Island, Philippines (Coleoptera, Curculionidae, Entiminae, Pachyrhynchini), Baltic Journal of Coleopterology 18 (2), pp. 139-158 : 154-157

Metapocyrtus yoshitakei sp. nov.

( Figs. 7 a-7d)

Diagnosis

Metapocyrtus yoshitakei shows a great affinity to Metapocyrtus vigintimaculatus Heller, 1927 (Type locality: Luzon, Nueva Viscaya: Bayombong), but it is easily distinguishable by the different puncturation of pronotum and elytra, presenting a less pronounced sculpture, with less wrinkled surfaces and less deep points; moreover each elytron presents nine spots with a different disposition, instead of ten as in vigintimaculatus .

Type material. Holotype male “Philipphines - Mindoro / Mt. Halcon : 1300 Mt. / Coll. Data: III-IV.2013 / coll. Franco Sandel ”, will be deposited in SMTD

Paratypes (61 males, 37 females): 7 males, 6 females: Philippines - Mindoro / Mt Halcon (Baco) / IV-VI.2013 / legit local people - coll. M. Bollino ; 16 males, 6 females: Philippines G Mindoro / Mt Halcon III-IV.2013 / m 1300 legit local people - coll. M. Bollino ; 8 males, 4 females: Philippines - S. Luzon / Mindoro I.: Mt. Halcon / m 500 - VI.2008 / coll. Bollino ; 2 males: Philippines / Mindoro - Mt. Halcon / V.2008 / coll. Bollino , all in MBLI; 16 males, 13 females: Philippines - Mindoro / Mt. Halcon: 1300 Mt. / Coll. Data : III-IV.2013 / coll. Franco Sandel; 3 males, 1 females: Philippines - Mindoro / Mt. Halcon / Coll. Data : IV-VI.2013 / coll. Franco Sandel; 5 males, 7 females: Philippines - Mindoro / Mt. Halcon / Coll. Data : XI.2011 / coll. Franco Sandel; 1 males: Philippines- Mindoro / Mt. Halcon / Coll. Data : XII.2012 / coll. Franco Sandel; 1 male: Philippines - Mindoro / Mt. Halcon-III.2014 / coll. F. Sandel ; 2 males: PhilippinesG Mindoro / Mt. Halcon / Coll. Data : V.2011 / coll. Franco Sandel, all in CFS.

Description

Male. Dimensions: LB: 10.4 G 11.8 (holotype 11.3; â: 11.06). LR: 1.7 - 1.9 (1.9; â: 1.82). WR: 1.4 - 1.5 (1.5; â: 1.46). LP: 3.8 - 4.5 (4.5; â: 4.2). WP: 3.8 - 4.3 (4.3; â: 4.1). LE: 6.7 G 7.3 (6.7; â: 6.84). WE: 4.4 - 5.0 (4.7; â: 4.66).

N = 5 for all measurements.

Head, elytra and ventral parts black, glossy surface. Body subglabrous, upper part with sparse and short brown hairs, present on rostrum and on apex of the elytra, lower part with sparse and short pale yellow hairs under the rostrum, between th e coxae, on mesoster num an d metasternum, numerous on ventrites I and II, more sparse on ventrite III and few on the ventrites IV-V.

Head subglabrous, with few short brown hairs, upper part of the rostrum with thin longer hairs, ventral and lateral part of the rostrum with longer brown hairs, spot of yellow scales under the eye from the front to the middle of the ocular orbit. Apex of the rostrum with brown bristles.

Pronotum with anterior and posterior thickened edges, the latter less marked than the former. Anterior edge with two spots of pale yellow scales, extended to the pronotal disk; two more elongated dorso-lateral spots of pale yellow scales converging from the middle of pronotum to the posterior edge; wide elongate latero-ventral spot of yellow scales from the anterior to the posterior edge. Elytra with spots of round pale yellow scales so distributed: two round spots in the anterior third, the first in the space between striae II and VII, the second, elliptical, in lateral position between stria VIII and the elytral edge; central band of four spots: the first between striae II and V, the second, smaller and more advanced towards the base, between striae V and VII, third, largest and more elongate than the first, in the space between striae VII and X, last very elongate spot between stria IX and the elytral edge. Apical third with three spots, the first largest and elongate in the space between striae II and VI, the second, lateral and smaller, in the space between striae VII and VIII, lastly one triangular spot in apical position between striae II and X.

Elytral striae formed by aligned points dorsally, more delineated and confused laterally, each point with a short yellowish bristle, longer in the apical region; finely wrinkled interstriae.

Femora covered by brown adpressed bristles, slightly thicker and more elongate towards the distal part. Tibiae covered in the external part by short, less adpressed bristles, inner edge indented with a series of small teeth (absent on the hind tibiae), and a fringe of brown bristles. Coxae with sparse yellowish hairs. Mesosternum glabrous, transverse furrow glabrous, with few pale hairs in the area between the coxae. Metasternum with few pale yellow bristles in the central part, two spots with yellow triangular scales on both sides.

Ventrite I with short, adpressed light yellow bristles, slightly thicker in the longitudinal groove; ventrite II with a few pale yellow bristles, more sparse on sides; ventrites III-IV-V with a few short pale yellow bristles; ventrite V flat and with a series of large wrinkled points covered with short bristles.

Eyes slightly protruding from the contour of the head, very flattened with convexities more accentuated backward. Antennae with scape thin and longer than the funnel; I segment elongated, about 2.7 times longer than wide, almost 1.2 times longer than II; II segment elongated, about 2.3 times more long than wide, and 2.2 times longer than III; III and IV segments as long as wide; V, VI and VII segments about 0.8 times longer than wide; club swollen and covered with thick brown pubescence, about 2.3 times longer than wide.

Rostrum 1.26 times longer than wide (LR/WR 1.26), enlarged at the apex with scrobe clearly visible from above; dorsum wrinkled and covered with coarse spots, with a longitudinal deep groove along midline interrupted towards the anterior forth; sides raised with more pronounced roughness; dorso-laterally, between the upper half of the edge of the antennal furrow and the anterior edge of the eye, a deep longitudinal incision strongly wrinkled; ventral surface more convex forward, without any projection.

Pronotum subglobose, narrowed forward, slightly longer than wide, ( LP /WP 1.04), its largest width immediately after the middle, its dorsal outline higher in the middle; dorsal surface with small sparse and shallow points, surface between the points finely wrinkled; slightly marked discal longitudinal impression from the anterior edge almost to the posterior one.

Elytra subovate ( LE /WE 1.42), more large than pronotum, ( WE /WP 1.1), with largest width just before the middle, dorsal profile constantly convex, higher at the anterior third, terminal part before the apex with a slight expansion like a hull, more convex in lateral view just behind the apical spot, then degrading perpedicularly towards the apex forming a right angle; between the hull projection and the apex, a series of long brown bristles along sutural stria; some longer brown bristles the apical edge in proximity of last striae. Elytra in ventral vision with greater width in the middle, then abruptly narrowing to the apical third, and rounded in proximity of the apex.

Slender legs, with clavate femora; fore tibiae curved at the apex, mid and hind tibiae with slightly more pronounced curvatures, fore tibiae with straight inner edge, a dense series of short tubercles, and blackish mucrones; mid tibiae with several small tubercles, and black small mucrones; hind tibiae without tubercles, with an inner light fringe of bristles.

Genitalia as illustrated (figs 8a-8d; 9d).

Female. Dimensions: LB: 10.8 G 12.3 (â: 10.55). LR: 1.5 G 2.0 (â: 1.75). WR: 1.3 - 1.7 (â: 1.45). LP: 3.3 - 4.0 (â: 3.6). WP: 3.2 - 4.1 (â: 3.6). LE: 7.5 G 8.3 (â: 8.0). WE: 4.8 - 5.6 (â: 5.1).

N = 6 for all measurements.

Elytra more convex than the male, with a more regular convexity, apical third with dorsal hull more pronounced than in the male, with terminal profile less perpendicular and slightly obtuse apex. Elytral spots smaller, more elongate and covered by pale yellow scales. Mesosternum and metasternum slightly wrinkled and with sparse and short brown bristles, ventrites I-II-III with few transverse wrinkles, slightly more evident on the sides. Hind femora shorter than in the male, just slightly protruding from the elytral apex. Other characters like in the male.

Genitalia as illustrated (figs 8e- 8g).

Distribution. Widespread and usually not so scarce all along the mountain ridges of Mindoro.

Etymology. The new species is dedicated with great esteem and friendship to Hiraku Yoshitake (Tsukuba, Japan) for his great contribution to a better knowledge of both the taxonomy and systematics of the Curculionidae Pachyrhynchini.

Figures

Fig. 7. a: Metapocyrtus yoshitakei Holotype dorsal view; b: idem, lateral view, c: Metapocyrtus yoshitakei female dorsal view; d: idem, lateral view