Macrocyrtus (Exmacrocyrtus) caerulans, Rukmane, 2019

Rukmane, Anita, 2019, Two New Species Of The Genus Macrocyrtus Subgenus Exmacrocyrtus Schultze, 1924 (Coleoptera: Curculionidae: Entiminea) From Luzon Island, Philippines, Acta Biologica Universitatis Daugavpiliensis 19 (2), pp. 261-266 : 262-264

Macrocyrtus (Exmacrocyrtus) caerulans sp. nov.

Fig. 1 A-B, Fig. 2 E-H.

Differential analyses. Macrocyrtus (Macrocyrtus) caerulans sp. nov. on general appearance is similar to Macrocyrtus (E.) erosus ssp. auroanulatus Heller, 1929 but is readily distinguishable from this species by various morphological features: 1) elytra of Macrocyrtus (Macrocyrtus) caerulans sp. nov. narrower, with unique scally markings, with expressed intervals, finely punctured, elytra of M. (E.) erosus ssp. auroanulatus smooth, wider, without expressed intervals; 2) different dorsal contour of elytra; 3) prothorax of the new species narrower, less rounded in dorsal contour.

Description. Male. Dimensions. LB: 11,9; LR: 1,9; WR: 1,6; LP: 3,1; WP: 3,3; LE: 8,8; WE: 5,8. N=1 for all measurements. Habitus as shown in Figs. 1A .

Integument black, shiny; body, antennae and legs black, shiny, with markings of dark blue scales; underside with weaker lustre, with dark blue round scales on metasternum, ventrites mingled with long, light hairs laterally, strongly pubescent; metacoxa with line of elongated dark blue scales along internal margin.

Head sub ovate, finely punctured and firmly pubescent; genae with patch of pale blue elongated scales, mingled with long white hairs up to ventral part; forehead slightly wrinkled between eyes, with slight medial impression, nearly 1,7 times as wide as eye width, without scales; rostrum strongly pubescent, with moderate long light hairs from antennal scape to labrum; in dorsal contour widened at apical ½, slightly narrowed to basal ½ and slightly widened to base; dorsally with longitudinal groove from middle of rostrum to middle of forehead, with lanceolate impression; eyes slightly convex, relatively big, moderately prominent from the outline of the head. Antennae slender; segment I longer than segment II, nearly 4 times as long as wide; segment II nearly 3 times as long as wide, 2,2 times as long as segment III, segments III to VII sub equal in size; club lanceolate, nearly 2,5 times as long as wide. Rostrum longer than wide, LR/WR 1,19.

Prothorax sub cylindrical, nearly sub equal in length and width, LP/WP: 1,06, with the following scaly markings: 1) line of dark blue scales along apical margin from one lateroventral part to other; 2) a pair of patches on disc along basal margin, each redirected laterally; 3) ovate patch of scales on each lateroventral part; nearly smooth, slightly pubescent; widest just before middle, in dorsal contour smallest width along apical margin, then increased and widest just before the midline, firmly rounded and weakly decreased in direction to basal margin, along sub-basal part slightly incurved.

Elytra sub-lanceolate, widest just in the middle; in dorsal contour gradually increased from basal margin to widest middle, then gradually decreased to apex; each elytron with the following scaly markings: 1) one round and one oval patch of dark blue scales on basal part, first centred, second redirected laterally; 2) small oblong patch on lateral margin along just before midline; 3) two patches along medial part, one round, nearly from suture to interval IV, second sub oval, extended transverse, ends just before lateral margin, both patches connected; 4) elongated transverse patch from just after the middle to apical ½ along interval I to just before lateral margin; 5) small elongated patch near apex along interval III; LE/ WE: 1,52; wider and longer than prothorax, WE/ WP: 1,76, LE/LP: 2,84; smooth on entire length, with finely expressed intervals, pubescent from apical 1/3 to apex.

Front and middle coxa without scaly markings; front coxa with short, light hairs; femora without scally markings, sparsely covered with longer or shorter light hairs, pubescent; tibia with long light hairs along internal margin and on apical part; tibia with protrusions along internal margin, each prostration with brownish spike, spikes shorter than in M. (E.) fulgidus sp. nov., protrusions on hind tibia fairly bigger than those on the from tibia.

Aedegal body as shown in Fig. 2 E-H.

Female. Dimensions: LB: 11,9 – 13,3 (mean 12,82); LR: 1,8 – 1,9 (mean 1,88); WR: 1,6 – 1,7 (mean 1,63); LP: 2,8 – 3,3 (mean 3,15); WP: 3,0 – 3,4 (mean 3,28); LE: 8,8 – 10,1 (mean 9,66); WE:

6,0 – 6,7 (mean 6,45). N=4 for all measurements. LR/WR 1,15; WP/LP 1,06; LE/WE: 1,5; LE/LP: 3,07; WE/WP: 1,97. Elytra strongly wider than in males, in dorsal contour evenly rounded from base to apical 1/5, apex strongly extended, apical margin wrinkled out at apex, with few long light hairs; prostrations on internal margin of hind tibia smaller than in males. Rest as in males.

Type material. Holotype: ‘’ PHILIPPINES. N Luzon / Ifugao, Banaue / I.2016 / local collector leg. ‘’ (typed on a white card); ‘’ HOLOTYPE / Male / Macrocyrtus (Exmacrocyrtus) caerulans / Rukmane, 2019 / det. Rukmane, 2019 ’’ (typed on a red card).

Paratypes (6 females): ‘’ PHILIPPINES / N Luzon, Ifugao, Banaue / IX.2015 / local collector leg.’’ (typed on a white card); ‘’ PHILIPPINES / N Luzon, Ifugao, Banaue / I.2016 / local collector leg.’’ (typed on a white card); ‘’ PHILIPPINES / N Luzon, Ifugao, Banaue / IV.2016 / local collector leg.’’ (2) (typed on a white card); ‘’ PHILIPPINES / N Luzon, Ifugao, Mt. Amuyao / VIII.2018 / local collector leg.’’ (2) (typed on a white card); All with additional red prinded card: ‘’ PARATYPE / Female / Macrocyrtus (Exmacrocyrtus) caerulans / Rukmane, 2019 / det. Rukmane, 2019 ’’ (all in DUBC).

Distribution. Philippines, Luzon Island., Ifugao Province.

Etymology. This species is named after its indigo-blue markings. Blue on Latin – caeruleum.

Figures

Fig. 1. Dorsal habitus of M. (E.) caerulans sp. nov.; A – male; B – female.

Fig. 2. Male genitalia of M. (E.) fulgidus sp. nov. (A – D); M. (E.) caerulans sp. nov. (E – H); A, E – aedeagus in latereal view; B, F – aedeagus in ventral view; C, G – strenite IX in ventral view; D, H – tegmen in ventral view.