Metapocyrtus (Dolichocephalocyrtus) chloroglosus, Rukmane-Bārbale, 2024

Rukmane-Bārbale, Anita, 2024, Three new species of the genus Metapocyrtus Heller, 1912 (Curculionidae: Entiminae) from Negros Island, Philippines, Baltic Journal of Coleopterology (Basel, Switzerland) 24 (2), pp. 131-139 : 133-135

Metapocyrtus (Dolichocephalocyrtus) chloroglosus sp. nov.

( Fig. 2A- B, D, F )

Type material. Type material. Holotype, male ( Fig. 2A ): PHILIPPINES / C Visayas, Negros Isl. , Mt. Canlaon / 600 – 900m / I. 2014 / local collector leg. (white printed label) // HOLOTYPE / Metapocyrtus (Dolichocephalocyrtus) chloroglosus / Rukmane-Barbale, 2024 (typed on red card) .

Paratypes (6♀, 8♂): 1♂ same data as holotype // 1♀, 4♂ same data as holotype, but 25. IV. 2014 // 5♀, 3♂ same data as holotype, but VIII. 2014. The additional label: “ PARATYPE / Metapocyrtus (Dolichocephalocyrtus) chloroglosus / Rukmane-Barbale, 2024” (typed on red card) was added to both paratypes ( DUBC) .

Diagnosis. M. (D.) chloroglosus sp. nov. is similar to M. (D.) negrosensis Schultze, 1925 ( Fig. 1D - E ), single representative species of the subgenus Dolichocephalocyrtus from Negros Island. The new species can be distinguished by characteristic glossy green scally markings on prothorax and elytra instead of bare black M. (D.) negrosensis Schultze, 1925 ; bigger

133 size on new species; elytra of new species longer, elliptical compared to short, sub globular elytra of M. (D.) negrosensis Schultze, 1925 ; different shape of male genitalia.

Description. Holotype. Male. Dimensions: LB: 7,3 – 8,9 (holotype 8,1, mean 8,18); LE: 4,4 – 5,8 (holotype 5, mean 5); LP: 2,8 – 3,0 (holotype 3, mean 2,93); WE: 2,9 – 3,3 (holotype 3,2m mean 3,15); WP: 3,0 – 3,8 (holotype 3,3, mean 3,41); LR: 1,3 – 1,5 (holotype 1,3, mean 1,31); WR: 1,1 – 1,3 (holotype 1,1, mean 1,13). N = 8 for all measurements.

Integument black, glossy, underside with weaker lustre, marked with glossy green, round scales. Head dorsally with scally patch from middle of forehead to middle of rostrum, with corresponding moderate setae; lateral parts with long setae from genae to apex, without scally markings. Prothorax with the following glossy green scally markings: 1) transverse band medially on disc, narrowest at middle and slightly extending to sides; 2) transverse band along anterior margin in all length; 3) large patch at each latero ventral part. Each elytron with the following glossy green scally markings: three transverse bands, one at sub basal part, one along middle, one along apex, bands can be distinct or nearly confluent, sometimes with additional longitudinal band from medial transverse band to apex along intervals III – V. Elytra pubescent in all length, with moderate setae along apex. Each femur covered with fine hairs increasing posteriorly, without scally markings. Tibiae covered with long setae in all length and longer hairs along internal margin, fore tibiae mucronate.

Head moderately punctured; forehead flattish, with moderate median furrow from middle of rostrum to before posterior ocular edge; eyes nearly not convex from outline of the head. Rostrum slightly longer than wide

134 (LR/WR 1,15); moderate transverse basal groove; dorsum roughly punctured, moderate elliptical medial groove from base of rostrum to middle of apical half; in dorsal contour straight, lateral parts slightly convex from outline of rostrum; in lateral contour nearly straight, weakly increased towards apex. Antennal scape flattened, with fine setae at apical half, shorter than funicle; funicular segment I longer than II, three times as long as wide; segment II 2.5 times as long as wide, two times longer than segment III; segments III – VII subequal; club ellipsoidal, more than twice as long as wide.

Pronotum sub spherical, rough – scally textured, slightly wider than long (WP/LP 1,16), slightly wider than elytra (WP/WE 1,08); convex, sometimes with shallow medial longitudinal groove; dorsal contour widest just before the middle; lateral contour widest at the middle.

Elytra ovate (LE/WE 1,58), less than two times longer than prothorax (LE/LP 1,7), punctured in fine puncture rows; dorsal contour highest at middle; lateral contour widest at middle.

Genitalia as illustrated in Fig. 2F .

Female. Dimensions: LB: 9,7 – 11,6 (mean 10,7); LE: 6,7 – 8,4 (mean 7.525); LP: 3,2 – 3,6 (mean 3,37); WE: 3,9 – 4,3 (mean 4,15); WP: 3,9 – 4,3 (mean 4,12); LR: 1,3 – 1,6 (mean 1,45); WR: 1,2 – 1,3 (mean 1,25). N = 6 for all measurements. Larger, prothorax less globular, posterior margin wider, with moderate medial groove on dorsum, apex of elytra extended, with longer setae along apex; medial transverse scale band on dorsum of prothorax interrupted at middle; otherwise, essentially as in males ( Fig. 2B ).

Distribution. The new species is known exclusively from type locality, Negros Island, Mt. Canlaon.

Etymology. Chloro- (green) and glossus (shiny surface), describing its glossy green markings.

Comments. The new species appear sympatric and is a new mimicry pair example with M. (M.) virgatus Heller, 1912

Figures

Figure 1. Dorsal habitus of selected species exhibiting Negros Island: A, C – M. (M.) virgatus Heller, 1912; A - male; C – female; B – M. (M.) reyesi Schultze, 1925, male; D, E – M. (D.) negrosensis Schultze, 1925; D – male; E – female; F – M. (T.) nanus Boheman, 1845; G, H – M. (T.) corpulentus Schultze, 1934; G – male; H – female; I, J – M. (T.) socius Schultze, 1925; I – male; J – female; K – M. (T.) augustanae Terzin & Bangoy, 2023.

Fig. 2. A, B, D, F – M. (D.) chloroglosus sp. nov.; A – male, holotype; B – female, paratype; D – male, lateral view; F – aedeagus in lateral view; C, E, G – M. (D.) agryoglosus sp. nov.; C – male, holotype; E – lateral view; G – aedeagus in lateral view.