Metapocyrtus (Trachycyrtus) chlorominimus, 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 : 136-137

Metapocyrtus (Trachycyrtus) chlorominimus sp. nov.

( Fig. 3E- F , 4E )

Type material. Type material. Holotype, male ( Fig. 3E ): PHILIPPINES / Nwgros Oriental , Mt. Canlaon / 600 – 900m / VIII. 2014 / local collector leg. (white printed label) // HOLOTYPE / Metapocyrtus (Trachycyrtus) chlorominimus / RukmaneBarbale, 2024 (typed on red card) .

Paratypes (1♀, 3♂): 1♀ same data as holotype // 3♂ same data as holotype, but X .

136 2014. The additional label: “ PARATYPE / Metapocyrtus (Trachycyrtus) chloromanimus / Rukmane-Barbale, 2024” (typed on red card) was added to both paratypes ( DUBC) .

Diagnosis. M. (M.) chlorominmius sp. nov. is distinct from the rest of the species exhibiting Negros Island by its small, slender body and unique scally markings. Species can be distantly related to M. (T.) nanus Boheman, 1945 by presence of glossy green scale markings, but can be distinguished by flat body shape instead of relatively convex M. (T.) nanus Boheman, 1845 .

Description. Holotype. Male. Dimensions: LB: 6,0 – 6,2 (holotype 6,0, mean 6,1); LE: 3,8 – 4,1 (holotype 3,8, mean 3,925); LP: 2,0 – 2,2 (holotype 2,0, mean 2,05); WE: 2,2 – 2,3 (holotype 2,3, mean 2,275); WP: 1,9 – 2,2 (holotype 2,2, mean 2,075); LR: 0,9; WR: 0,8. N = 4 for all measurements.

Integument glossy black except reddish legs and antennae; body sub ellipsoidal, with metallic green scales. Head, rostrum along basal half, pronotum and elytra evenly marked with single, metallic green scales; underside with single scales at sides of each ventrite; genae with irregular patch of metallic green scales. Each femur covered with fine setae in all length, tibia covered with short setae in all length.

Head minutely punctured; forehead flat, with weak medial groove from base of rostrum to posterior ocular edge; eyes small, not convex from outline of the head, 1.5 times as wide as forehead. Rostrum wider than long (WR/LP 1,12); moderate transverse basal groove, sides curved downwards; dorsum wrinkled, without longitudinal groove, in dorsal contour straight, lateral parts moderately prominent from outline of rostrum. Antennae with club 3.5 times as long as wide.

Prothorax cylindrical, same length and width, moderately granulated, slightly pubescent in all length; in dorsal contour narrowest along anterior margin, slightly impressed at subapical part, slightly increased to widest just before the middle, then slightly decreased to posterior margin; expressed posterior groove; anterior groove indistinct.

Elytra ellipsoidal, longer than wide (LE/WE 1,77), nearly two times as long as prothorax (LE/LP 1,9), moderately punctured, without expressed puncture rows; dorsal contour widest just at the middle, lateral contour widest at the middle.

Genitalia as illustrated ( Figs. 4E ).

Female. Dimensions: LB: 7,0; LE: 4,9; LP: 2,0; WE: 3,1; WP: 2,2; LR: 0,9; WR: 0,8. N = 1 for all measurements. Larger, elytra wider (LE/WE 1,58), with expressed growths along sub basal part; basal half along suture without scally markings, otherwise essentially as in males ( Fig. 3F ).

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

Etymology. Chloro- (green) and minimus (smallest), highlighting its size and bright green markings.

Figures

Fig. 3. A-D – variation of M. (M.) pilositibialis Schultze, 1925; A, B – male; C, D – female; E, F – M. (T.) chlorominimus sp. nov.; E – male, holotype; F – female, paratype.

Fig. 4. A-D, F-G - variation of M. (M.) pilositibialis Schultze, 1925; A, B – head, dorsal view; C,D – aedeagus, lateral view; F, G – head, lateral view; E – aedeagus of M. (M.) chlorominimus sp. nov., lateral view.