Pachyrhynchus orientalis, Rukmane, 2017

Rukmane, Anita, 2017, New Species Of The Genus Pachyrhynchus Germar (Coleoptera, Curculionidae, Entiminae) From The Greater Mindanao Pleistocene Aggregate Island Complex (Philippines), Acta Biologica Universitatis Daugavpiliensis 17 (1), pp. 85-95 : 89-93

Pachyrhynchus orientalis sp. nov.

( Figs. 1D, E ; 3 , 4, 6B, 7)

Type material. Holotype: Male ( DUBC) ‘’ PHILIPPINES, Mindanao Island, Bukidnon, Cabanglasan , VII. 2014, / local collector leg. /’’ (typed on white card); ‘’ex. Prof. A. Barševskis coll.’’ (typed on white card) ; ‘’ HOLOTYPE / Male / Pachyrhynchus orientalis / Rukmane, 2017 / det. Rukmane Anita, 2017’’ (typed on red card). Paratypes: 5 males and 1 female from Mindanao Island, Bukidnon, Cabanglasan (VIII. 2013; I. 2014; VI. 2014; VII. 2014 (2)) , 2 males and 2 females from Mindanao Island, Surigao Del Sur, San Miguel (VIII. 2013, VI. 2014 (2), VIII. 2014). All in DUBC .

Distribution: Philippines, Mindanao Island, Eastern part ( Fig. 7 ).

Description. M a l e. Dimensions: LB: 13.9- 15.7 (holotype 15.6; mean 15.09); LR: 1.6-1.8 (holotype 1.7; mean 1.73); WR: 1.5-1.8 (holotype 1.8; mean 1.7); LP: 3.3-3.95 (holotype 3.9; mean 3.73); WP: 3.95-4.8 (holotype 4.7; mean 4.47); LE: 8.8-10.2 (holotype 9.75; mean 9.49); WE: 5.4-6.25 (holotype 6.25; mean 6.0). N = 8 for all measurements. Dorsal habitus as shown in Fig. 1D .

Integument dark coppery red to brown, some paratypes almost black; antennae and mandibles darker. Body surface strongly shiny except underside which has a weaker luster.

Body with weak pubescence, with glossy nacreous green to goldish markings of recumbent round scales.

Head dorsally subglabrous, moderately finely punctured, with linear scaly patch along midline from vertex to middle of rostrum; lateroventral parts below eyes with irregular shape scaly patch. Forehead almost without depression along midline. Eyes relatively large, moderately prominent from lateral contour of head. Antennae short and stout, with scape a bit of shorter than funicle; funicle with segment I 1.8 times longer than wide, proximately same length as II; segment II 1.5 times as long as wide, 1.7 times as long as III; segments III-V subequal in length and width, slightly wider than long, narrower than VI; segment VI slightly wider than long, strongly narrower than VII; segment VII club subellipsoidal, 1.8 times as long as wide.

Rostrum minutely pubescent; lateroventral parts except antennal scrobes covered with round to oval nacreous green scales, densely furnished with long golden setae near apex. Rostrum slightly wider than long, WR/LR 1.06; Deep obcordate concavity on basal half, two strong bulges at each side on apical half; apical bulge with peak on middle of apical half, flattish dorsally; dorsal contour of rostrum flattish in basal half, with weak declining at median part, weakly raised from middle to apical third and gradually declined to apex; ventral surface convex along midline.

Prothorax with a two longitudinal scale stripes dorsally in the middle; Stripes convergent toward and confluent near anterior margin. Lateral margins circumscribed by scale stripes that in overall forms a large oval shaped figure; shape subspherical, wider than long, WP/ LP 1.21, widest at middle; subapical groove weak, almost entirely distinct; subbasal groove thick, expressed. Lateral contour: bulge in basal part which straighten up at basal 1/3, smooth to dorsal part with very weak bulge in subapical part.

Elytra subovate, LE /WE 1.56, two and half times longer than prothorax, LE / LP 2.5, moderately striate-punctured, intervals even; contour widest just before middle. Each elytron with long hairs, located on apical half; following scaly markings: 1) transverse oval figure circumscribed by a narrow scale band in basal third, reaching from interval I to lateral margin; 2) two narrow parallel transverse bands confluent at margin with a marginal stripe in the middle, latter of which circumscribes in apical third a triangular figure. Legs stout; femora strongly clavate; Coxae covered with general scales on anterior parts, mingled with short light brown hairs. Hind femora with oval patch of scales along posterior margins, mingled with rare short hairs. Tibiae sparsely pubescent, furnished with long dense hairs along internal margin. Tarsus and claws thickly furnished with long golden hairs.

Genitalia as illustrated in Fig. 3 . Sternite IX slender, nearly 1.4 times as long as aedegal body, strongly incurved leftward. Aedegal body stretched out, in lateral view moderately curved ventrally in the bazal third, and gradually attenuated in the apical part, apex with angle-shaped ventral margin, curvature raised dorsally and sharply incurved ventrally at middle, with pyramidal bulge at basal middle; two prominent bulges near base of ostium with pyramidal shape on lateral view. In frontal vision widest at base, narrowed at basal third and gradually extended at apical part. Aedegal apodemes slender, neatly 2.25 times shorter than aedegal body. Tegmen with slender apodeme, nearly twice as long as diameter of tegminal ring.

F e m a l e. Dimensions: LB: 15.3-16.2 (holotype 15.3; mean 15.87); LR: 1.45-1.6 (holotype 1.45; mean 1.53); WR: 1.9-2.05 (holotype 1.9; mean 1.95); LP: 3.75-4.2 (holotype 3.75; mean 4.02); WP: 4.1-4.85 (holotype 4.1; mean 4.57); LE: 9.5-9.5 (holotype 9.3; mean 9.43); WE: 6.85-7.0 (holotype 6.85; mean 6.92). Dorsal habitus as shown in Fig. 1E , lateral as shown in Fig. 6B. N = 3 for all measurements.

Rostrum much wider than in males WR/LR 1.30. Prothorax WP/ LP 1.1; Elytra LE /WE 1.36, WE/ WP 1.68, LE / LP 2.48.

Diagnosis. Pachyrhynchus orientalis sp. nov. according to scale pattern and shape of male genitalia is similar to all species from ‘’absurdus’’ group, but is easily distinguishable by specific characters: huge apical bulge on rostrum, thick subbasal groove on pronotum, bulge on basal part of pronotum, smaller interval between eyes, differences in male aedegal body ( Fig. 3 ), apical half or each elytron with intense short hairs.

Etymology. Pachyrhynchus orientalis sp. nov. is called based on it’s distribution which is northern

part of Mindanao Island. Northern – oriental.

Pachyrhynchus occidentalis sp. Nov.

( Figs. 1A, B ; 5, 6 , 7 )

Type material. Holotype: Male ( DUBC) ‘’ PHILIPPINES, Mindanao Island, Davao Del Sur, Kapatagan , IX. 2016, / local collector leg. /’’ (typed on white card); ‘’ex. Prof. A. Barševskis coll.’’ (typed on white card) ; ‘’ HOLOTYPE / Male / Pachyrhynchus occidentalis / Rukmane 2017 / det. Rukmane Anita, 2017’’ (typed on red card). Paratypes: 7 males and 6 females from Mindanao Island, Cotabato, Mt. Parker ( IV. 2014 (2); VI. 2014; VII. 2014; VIII. 2014 (3); IX. 2014 (5)) ; 2 males from Mindanao Island , Sarrangani, Kiamba ( XII. 2015 (2)) ; 1 male from Mindanao Island, Mt. Apo ( VIII. 2013) . All in DUBC .

Distribution: Philippines, Mindanao Island, Western part ( Fig. 7 ).

Description. M a l e. Dimensions: LB: 13.95- 15.95 (holotype 14.35; mean 14.62); LR: 1.5-1.75 (holotype 1.7; mean 1.64); WR: 1.7-1.95 (holotype

1.95; mean 1.84); LP: 3.05-3.75 (holotype 3.5; mean 3.32); WP: 3.45-4.15 (holotype 3.95; mean 3.87); LE: 8.45-9.3 (holotype 8.95; mean 8.94); WE: 4.95-5.45 (holotype 5.35; mean 5.17). N = 11 for all measurements.

Integument glowing red, with strong luster, in some paratypes coppery, antennae and mandibles darker.

Body with nacreous pale green to yellow markings of round recumbent scales.

Head glabrous, minutely punctured, forehead slightly impressed among midline, with linear line of scales from apex to basal half of rostrum, line narrows closer to rostrum. Eyes large, prominent from lateral contour of head; each eye highest at middle. Antennal scape shorter than funicle, moderately clavate, with long light hairs at distal side; funicle with segment I more than twice as long as wide, 1.4 times as long as II; segment II 1.25 times longer than wide, 1.3 times as long as III; segments III-VI equal in length, nearly as long as wide, slightly narrower than VII; segment VII nearly twice as longas wide, well furnished with short brown hairs.

Rostrum subglabrous, except with few general scales on basal half; lateroventral parts just behind antennal scrobes with irregular scaly patch on each side; patch fringed with hair-like scales along margins; long golden hairs near apex. Rostrum wider than long, WR/LR 1.15. Dorsum well punctured, with triangular concavity on basal half, bulging apically; apical bulge dorsally flatish; dorsal contour of forehead and rostrum convergent, narrow near eyes, bulging apically with peak at basal 1/3, concavity before antennal scapes and weak bulge at apical part with peak at apical 3/4; ventral surface weakly convex along midline.

Prothorax subspherical, wider than long, WP/ LP 1.13; weak convex near base; with the following three scaly markings: 1) transverse confluent line of scales at disc; 2) transverse convergent line of scales close to anterior angle, at anteriolateral angles line reach apical margin, at central part line is closer to disc with triangular peak almost reaching anterion margin in middle; 3) band of scales at lateral base, which connect both lines and circumscribes long oval shape. Dorsal contour confluent high from middle to basal 2/3, then narrow and gradually extends to basal margin.

Each elytron subglabrous, finely punctured, intervals smooth, well pronounced; almost no hairs near apex and at apical half; Following markings of scales: 1) transverse suboval figure circumscribed by a narrow scale band in basal third, reaching from interval I to lateral margin; 2) two narrow convergent parallel transverse lines confluent at margin with a marginal stripe in the middle, latter of which circumscribes in apical third a triangular figure. LE /WE 1.67, WE/WP 1.35, LE / LP 2.56. Dorsal contour highest before middle, gradually narrowed to apices.

Coxae minutely pubescent, mingled with short golden hair-like scales; fore coxae densely covered with general scales on anterior parts. Femora weakly covered with small pubescence and hair-like scales; oval patch of scales; oval scaly patch on subapical part except anterior margin, rather densely covered with long golden green hairs and hair-like scales on basal half among posterior margin. Tibiae partially furnished with light hairs which become longer apically at interomarginal parts.

Genitalia as illustrated in Fig. 5. Aedegal body stretched out, in lateral view sharply curved ventrally at the bazal fifth, and gradually attenuated in the apical part, apex with angle-shaped, rounded ventral margin, curvature raised dorsally and sharply incurved ventrally at middle; two prominent bulges near base of ostium, on lateral view bulge pyramidal. In frontal vision moderately even all along.

F e m a l e. Dimensions: LB: 14.7-16.45 (holotype 16.25; mean 15.7; LR: 1.65-1.8 (holotype 1.7; mean 1.73); WR: 1.7-1.9 (holotype 1.9; mean 1.8); LP: 3.05-3.4 (holotype 3.3; mean 3.2); WP: 3.3-3.9 (holotype 3.9; mean 3.67); LE: 9.35-11.75 (holotype 11.75; mean 10.29); WE: 6.05-6.45 (holotype 6.35; mean 6.22). N = 6 for all measurements.

Rostrum WR/LR 1.04. Prothorax WP/ LP 1.15; Elytra LE /WE 1.65, WE/WP 1.69; LE / LP 3.22.

Diagnosis. Pachyrhynchus occidentalis sp. nov. is similar to members of ‘’absurdus’’ group. Species specific characters: 1) shape of male genitalia ( Fig. 5); 2) slender elytra with most stretched out apex; 3) eyes bigger, closer to margin; other specific characters visible from lateral view ( Fig. 6C ).

Etymology. Pachyrhynchus occidentalis sp. nov. is called based on it’s distribution which is Western part of Mindanao Island. Western – occidental.

Figures

Fig. 1. Dorsal habitus of A- P. occidentalis, male; B – female; C – P. ilgas, male; D – P. orientalis, male; E – female; F – P. neoabsurdus, female.

Fig. 3. Male genitalia of P. orientalis; A – aedegal body in lateral Fig. 4. Female genitalia of P. view; B – aedegal body in frontal view; C – sternite IX; D – tegmen. orientalis. Scale 1mm. Scale 1mm.

Fig. 7. Distribution map of Pachyrhynchus ‘’absurdus’’ group.

Fig. 6. Lateral view of habitus; A – P. absurdus; B – P. orientalis; C – P. occidentalis; D – P. neoabsurdus. All females.