Metapocyrtus (Artapocyrtus) lumawigi, Bollino & Sandel, 2017

Bollino, Maurizio & Sandel, Franco, 2017, Two new taxa of the Subgenus Artapocyrtus Heller, 1912, Genus Metapocyrtus Heller, 1912 from the Philippines (Coleoptera, Curculionidae, Entiminae, Pachyrhynchini), Baltic Journal of Coleopterology 17 (1), pp. 1-14 : 3-5

Metapocyrtus (Artapocyrtus) lumawigi sp. nov.

(Plate 1 a-d)

Diagnosis

Metapocyrtus (Artapocyrtus) lumawigi is easily separable from all other species of Artapocyrtus known to date for the elytral ornamentation, consisting of longitudinal stripes of cupric red color, and striae I-XII generally interrupted in the middle (occasionally such striae are continuous from the base to the elytral apex).

Description. Male. Dimensions: LB: 10.2 - 1.15 (holotype 10.6; â: 10.3). LR: 2.00 - 2.20 (2.10; â: 2.14). WR: 1.65 - 1.80 (1.65; â: 1.71). LP: 3.80 - 4.20 (3.90; â: 3.95). WP: 3.80 - 4.25 (3.90; â: 3.95). LE: 6.2 - 6.80 (6.60; â: 6.50). WE: 5.10 - 5.21 (â: 5.15; 5.18). N = 4 for all measurements.

Habitus as shown in Plate 1 a-b. Integument black. Body upper surface strongly shiny, underside with weaker luster. Body mostly subglabrous. Head shiny without hairs. Rostrum moderately covered with minute hairs on dorsum; antero-lateral parts moderately covered with short brownish hairs, which become lon ger apically. Pr oth or ax with markings of pale yellow round scales as follows: a latero-ventral broad stripe on each side extended antero-laterally, a narrow band along apical and basal margins. Elytra with striae I-XI covered with metallic scales of cupric color, that outline fine stripes beginning shortly after the anterior margin and extending to the apex; in the median portion of the elytra there is a broad black glossy transverse band-like spot without scales widest at the suture, and narrowing laterally until it disappears on the VII stria. Striae V and VI joined at the base, starting shortly behind striae IV and VII. Stria XII, at anterior edge of elytra very short, and interrupted before the socket. Intestriae minutely punctured, each puncture with a light-colored short seta, longer and adpressed toward the apex.

Forehead flat, with sparse punctures with fine white bristles only above the eyes, smaller and without bristles behind them. Front with a median longitudinal groove; eyes relatively large, slightly prominent from the outline of the head, with convexity more pronounced posteriorly. Antennae with thin scape slightly longer than funiculus, with sparse small hairs more thick in the distal part, first segment of funiculus about three times longer than wide, and slightly longer than the second one; second segment about 2.7 times longer than wide, and about 2.5 times longer than the third; third segment about 1.2 times longer than wide; forth to seventh segments nearly as long as wide. Antennal club swollen, about 2.7 times longer th an wide, cover ed with fin e yellowish pubescence, with eighth segment perfectly tapered from the base to the distal part. Rostrum slightly longer than wide (LR/WR 1.30-1.35) widened at the apex, with smooth dorsum finely punctured, and with a deep basal transverse groove and a median longitudinal groove on

Bollino M., Sandel F.

basal half; more convex on basal third, then gradually less convex towards the distal part; dorsal boundary of the rostrum discontinuous from that of front, rather quickly lifted from the base; dorso-lateral edges well defined, not interrupted by the basal transverse groove; on each side is pr esen t a sligh t tr ian gular depression between the dorso-lateral edge and the antennal furrow. Ventral surface with a large conical projection in the middle, strongly convex ventrally, and with some long brown bristles.

Prothorax globose, nearly as long as wide (WP/ LP 1.00-1.05), maximum width somewhat apicad of the middle, with dorsal sparse punctures, surface finely wrinkled between the punctures.

Elytra subovate, (LE/WE 1.30-1.35), wider than the prothorax (WE/WP 1.25-1.30, LE/LP 1.75- 1.80), with convexity more marked in the middle, finely striate-punctured.

Legs slender, femora moderately clavate, with sparse brown bristles, longer and adpressed toward the distal end. Tibiae moderately covered with brown bristles, with a series of teeth along the inner edge and sparse fringe of long hair. Mucrones present, but reduced. Coxae, sternites and ventrites with sparse and scattered light long adpressed hairs, shorter on the edges; ventrite V flat, with a tuft of long brown hairs, laterally clearer and shorter.

Genitalia as illustrated on Plate 2 a-d. Spiculum gastrale (Plate 2 c) slender, nearly 1.7 times as long as penis body, strongly curved leftward after half. Penis body (Plate 2 a-b) slender; in lateral view ventral side uniformly curved, dorsal side gradually curved towards the apex to form a tubercle, bent nearly at right angle to the ventral side; in dorsal view (Plate 2 b) it is slightly sinuate in sub-basal part, apical 1/4 regularly and gradually sinuate to the apical tubercle. Penis apodemes slender, nearly 1.5 times as long as penis body. Tegmen (Plate 2 d) with slender apodeme, nearly 1.8 times longer than the diameter of tegminal ring.

We obtained only the partial evertion of the endophallus of our specimens. Like in the case of M. (A.) quadriplagiatus , the fully inflated endophallus has two basal lateral diverticula, but unfortunately we did not succeed to evert the flagellar diverticulum.

Female. Dimensions: LB: 10.5. LR: 2.00. WR: 1.65. LP: 3.30. WP: 3.60. LE: 6.70. WE: 5.45.

Habitus as shown in Plate 1 c-d.

Forehead slightly wider than that of males. Rostrum slightly longer (LR/WR 1.21). Prothorax barely wider (WP/LP 1.09), rugose on the middle of dorsum. Ventrite I simple, not depressed. Ventrite V with a pair of deep oblique-ovate depressions along margins; interstices between depressions narrow, Yshaped. Tarsi smaller. Otherwise practically as in male.

Terminalia as illustrated in Plate 2 e-g.

Type material. Holotype male “ Philippines - South Luzon / Jose Panganiban (Camarines Norte) / September 2014 / ex I. Lumawig - coll. Bollino ” (typed on white card) // HOLOTYPE male / Metapocyrtus (Artapocyrtus) / lumawigi BOLLINO & SANDEL, 2017 (typed on red card), presently in MBLI, will be deposited in SMTD

Paratypes (16 males, 3 females: 1 male, 1 female, same data as holotype; 1 male, Philippines - Luzon I. / Camarines Norte / March 2014 / lg. local people - coll. Bollino; 2 males, Philippines - S. Luzon / Camarines Sur - Bicol / Tigaon / VI.2015 / ex Lumawig - coll. Bollino; 1 male, Philippines - S. Luzon / Bicol Prov. - Camarines Sur / Tigaon / VII.2015 / ex Lumawig - coll. Bollino; 3 males, Philippines - S. Luzon / Bicol - Camarines Norte / Panganiban / October 2015 / ex Lumawig - coll. Bollino, all in MBLI; 1 male, Philippines - LUZON / Camarines Norte Pr. / Panganiban - XII-2014 / Ex. Ismael Lumawig / Coll. Franco Sandel; 2 males, Philippines - LUZON / Camarines Norte Pr. / Panganiban - XII-2015 / Ex. Ismael Lumawig / Coll. Franco Sandel; 2 males, Philippines LUZON / Bicol Province / Libon, Albay - XII-2014 / Ex. Ismael Lumawig / Coll. Franco Sandel, all in CFS; 1 male, 1 female, Philippines / N Camarines, Jose / Panganiban, VI.2014 / local collector leg. // ex. Prof. A. Barsevskis coll.; 1 male,, Philippines / N Camarines, Jose / Panganiban, VII.2014 / local collector leg. // ex. Prof. A. Barsevskis coll.; 1 female, Philippines / S Luzon, Catanduanes [sic] / Panganiban / November 2015 / local collector leg. // ex. Prof. A. Barsevskis coll., all in DUBC; 1 male, Camarines Sur, Bicol, X 2015, native, (Munetoshi Maruyama Collection), in KUM.

Distribution. The range of the new species ( map 1 ) falls within the Bicol subregion of the Greater Luzon biogeographical region, i.e. the Isarog sub-subregion (C8a sensu Ong et al. 2002).

Etymology. The new species is dedicated with friendship to Ismael Ocampo Lumawig (Manila, Philippines) for his contribution to a better knowledge of this interesting group of weevils.

Figures

Map 1. Distribution of M. (A.) lumawigi sp. n., M. (A.) quadriplagiatus caeruleus ssp. nov. and M. (A.) quadriplagiatus quadriplagiatus