Metapocyrtus inangsabong Cabras, Obrial & Agbas, 2024

Obrial, Graden G., Agbas, Daven Jayson D., Medina, Milton Norman D. & Cabras, Analyn A., 2024, Three New Mimetic Weevils (Coleoptera, Curculionidae, Entiminae) from Mt. Candalaga, Davao de Oro, Mindanao Island, Philippines, Zootaxa 5541 (4), pp. 438-454 : 439-441

Metapocyrtus inangsabong Cabras, Obrial & Agbas sp. nov.

urn:lsid:zoobank.org:act:582E0F1C-EC8B-410E-9C6E-B92B97ABC65F

Figure 1 A–D

Holotype ( Fig. 1 A, C ), male: “ Philippines — Mindanao Island, Davao de Oro, Maragusan / January 2024 / leg. E. Avergonzado (typed on white card) // HOLOTYPE male / Metapocyrtus inangsabong / CABRAS, OBRIAL & AGBAS, 2024 (typed on red card)” (Presently at TIRL, to be deposited at PNM. Paratype (4 males, 9 females); 1 female, same data as the holotype; 1 male, 3 females, Philippines — Mindanao Island, Davao de Oro, Maragusan / February 2024 /leg. G.Obrial, D.Agbas; 3males, 3 females, Philippines — Mindanao Island, Davao de Oro, Maragusan / June 2024 / leg. G. Obrial, D. Agbas; 2 females, Philippines — Mindanao Island, Davao de Oro, Maragusan / June 2024 / leg. E. Avergonzado, Y. Japitan (all in TIRL, to be deposited at PNM, SMTD and CMNC).

Diagnosis. Metapocyrtus inangsabong is unique from its congeners for its combination of characters having shiny dark crimson integument, subglabrous head, pronotum, and elytra, head and rostrum almost continuous, separated only by short transverse groove not reaching lateral margin, and apex of elytra in females with two, minute spines. So far, it is only found in the higher elevation of Mt. Candalaga in Davao de Oro.

Description. Male.

Dimensions: LB: 7.1–7.5mm (holotype 7.5mm). LR: 1.0– 1.3mm (holotype 1.3mm). WR: 1.0– 1.3mm (holotype 1.3mm). LP: 2.1–2.5mm (holotype 2.5mm). WP: 2.3–2.5mm (holotype 2.5mm). LE: 4.5–5.0mm (holotype 5.0mm). WE: 3.3–3.5mm (holotype 3.5mm). N=3 for all measurements.

Integument of antenna, apex of femora and tibiae and tarsi black; head, rostrum, pronotum, and elytra, dark crimson while legs are lighter crimson. Body and pronotal surface, rostrum, head, and underside lustrous; legs weakly lustrous.

Head dorsal surface punctate with sparse and appressed piliform bluish scales; lateral side near the eye with weak rugae, and below the eye with sparse and appressed, piliform, bluish and turquoise scales; forehead between eyes very weakly depressed with distinct median furrow; eyes medium-sized and weakly convex.

Rostrum almost continuous with head, separated only by a short but deep transverse groove not reaching the dorsolateral margin, weakly punctate on basal half with appressed and sparse, piliform, bluish scales and finely punctate on apical half with fewer setae, as long as wide (LR 1.3 mm; WR 1.3 mm), lateral sides with appressed, piliform, bluish scales interspersed with long, suberect, white setae, especially towards anterior margin; dorsum with distinct median furrow reaching the middle; dorsal contour in lateral view almost flat then subapically gradually declined towards apex, lateral contour in dorsal view anteriorly widened; dorsolateral margin weakly rounded, not angled. Antennal scape and funicle subequal in length. Scape covered with appressed, thin, light-colored setae, funicle with suberect, light-colored setae. Antennae with segments 1 and 2 subequal in length, three times longer than wide; segments 3 nearly a third shorter than segment 2 but slightly longer than segment 4; segments 4 to 6 nearly as long as wide; segment 7 slightly longer than 4 to 6; club subelliptical, nearly three times longer than wide.

Prothorax subcylindrical; finely punctate and sparsely covered with appressed setae; as long as wide (LP 2.5 mm; WP 2.5 mm), dorsal contour in lateral view nearly flat, lateral contour in dorsal view weakly convex.

Elytra ovate, longer than wide (LE 5.0 mm; WE 3.5 mm), slightly wider and twice longer than prothorax (WE 3.5 mm; WP 2.5 mm; LE 5.0 mm; LP 2.5 mm), body surface sparsely covered with minute setae and minute piliform, bluish scales along distal margins; dorsal contour in lateral view uniformly convex; lateral contour in dorsal view uniformly convex, slightly narrow at base then gradually widens towards middle then uniformly tapers towards a subobtuse apex. Legs with moderately clavate femorae covered in white and bluish setae and piliform scales. Tibiae covered with subadpressed and suberect white setae, weakly serrate along inner edge. Protibiae and mesotibiae mucronate at apex. Tarsi moderately long and pubscent. Tarsomere 1 elongate, and subtriangular, longer than tarsomere 2; tarsomere 2 short, triangular, and simple without sharp projections at apical corners; tarsomere 3 bilobed, slightly shorter than tarsomere 2; tarsomere 1 and 5 slightly subequal in length; tarsal claws free.

Coxae covered with colored piliform scales and setae. Mesoventrite covered with setae; metaventrite covered with setae. Ventrite 1 weakly depressed in the middle with some punctures and covered with dense setae. Ventrite 2 with some punctures and covered with dense setae. Ventrite 3–4 sparsely covered with white setae. Ventrite 5 flattened, and rugosely punctured with setae.

Male genitalia and sternite 9 as shown in figure 4 A–C.

Female Dimensions: LB: 9.0– 9.1mm. LR: 1.1–1.2mm. WR: 1.4–1.5mm. LP: 2.5mm. WP: 2.5–2.6mm. LE: 6.3–6.5mm. WE: 4.1–4.5mm. N=6 for all measurements.

Habitus as shown in Figure 1 B, D .

Female ( Fig. 1 B, D ) differ from males in the following characters: a) rostrum weakly depressed at middle, b) integuments of head and rostrum black, c) pronotum more cylindrical with nearly straight dorsal contour in lateral view, d) elytra longer and wider (LE/WE 6.5mm / 4.5mm, WE/WP 4.5mm / 2.6mm, LE/LP 6.5mm / 2.5mm) than male, e) lateral contour of elytra in dorsal view subapically interrupted, f) apical declivity gradual but interrupted subapically then abruptly declines towards apex; g) apex of elytra with two minute but acute spines; h) lateral margin of elytra, coxae and mesoventrite and metaventrite with white elliptical scales, i) with Ventrite 1 slightly convex in the middle; j) Ventrite 5 deeply concave. Otherwise, females similar to the male.

Etymology. The species name “ inangsabong ” refers to the legendary first Mansaka man to settle in Compostela Valley. According to stories, Inangsabong had seven wives, who later established various Mansaka communities throughout the region.

Distribution. Philippines (Mindanao: Davao de Oro, Maragusan, Mt. Candalaga).

Figures

FIGURE 1. Metapocyrtus inangsabong A—♂ holotype, dorsal view, C­—idem, lateral view; B—♀ paratype, dorsal view, D—idem, lateral view.