Pachyrhynchus neoabsurdus, 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 : 93-95

Pachyrhynchus neoabsurdus sp. nov.

( Figs. 1F , 7D , 8)

Type material. Holotype: Female ( DUBC) ‘’ PHILIPPINES, Mindanao Island, Bukidnon, Kalatungan Mountain , IX. 2014. / local collector leg. /’’ (typed on white card); ‘’ex. Prof. A. Barševskis coll.’’ (typed on white card); ‘’HOLOTYPE / Female / Pachyrhynchus neoabsurdus / Rukmane 2017 / det. Rukmane Anita, 2017’’ (typed on red card). Paratype: 1 female from Mindanao Island, Bukidnon , Intavas (VIII. 2014) ( DUBC) .

Distribution: Mindanao Island (Fig. 8).

Description. F e m a l e. Dimensions: LB: 13.15- 13.75 (holotype 13.15; mean 13.45); LR: 1.4-1.45 (holotype 1.4; mean 1.43); WR: 1.65-1.8 (holotype 1.65; mean 1.73); LP: 2.8-2.95 (holotype 2.8; mean 2.88); WP: 3.35-3.75 (holotype 3.35; mean 3.55); LE: 8.25-8.75 (holotype 8.25; mean 8.5); WE: 5.25-5.85 (holotype 5.25; mean 5.55). N=2 for all measurements. Dorsal habitus as shown in Fig. 1F.

Integument black, with green luster, elytra darker, with weaker luster. Antennae, mandibles black. Body surface mostly shiny except underside.

Body with nacreous orange markings of round recumbent scales.

Head glabrous, moderately punctured, with transverse line of orange scales from apex to beginning of rostrum. Forehead almost without medial depression. Eyes large, weakly prominent from contour of head. Rostrum without scales on dorsal view; wider than long, WR/LR 1.18; subtriangular concavity on basal half and weak bulge on apical half; shallow transverse groove before horsehead; lateroventral parts just behind antennal scrobes with few ellipsoidal scales on each side; scales fringed with short hairs and hair-like scales along margins. Antennal scape proximately 1.5 times shorter than funicle, moderately mingled with long light hairs; funicle with segment I little less than twice as long as wide, 1.25 times as long as II; segment II 1.5 times longer than wide, 1.3 times as long as III; segments III-VI equal in length, nearly as long as wide but narrower than VII; segment VII 1.5 times as long as wide.

Prothorax glabrous, longer than wide, WP/ LP 1.17; weak convex at disc; except with the following scaly markings: 1) transverse confluent scale line on disc; 2) transverse confluent scale line along anterior margin; 3) oval patch of scales at each lateral base, which connects both transverse lines and circumscribes oval extended figure. Dorsal contour continuous, widest from apical 2/3 to subbazal part where it narrows before extension at posterolateral margin.

Elytra glabrous. LE /WE 1.57, WE/WP 1.57; LE / LP 2.95. Each elytron with the following markings: 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 more of less triangular figure. Dorsal contour highest in middle.

Coxae very minutely pubescent, mingled with light brown hairs; fore coxae densely covered with general scales on anterior parts. Femur sparsely pubescent, with short light-brown hairs closer to base; large oval scaly patch on subapical part except anterior margin. Tibiae well furnished with light-coloured hairs which become more long and dense apically, sparsely mingled with slightly darker setae; ventral surface with hairs on interomarginal parts. Tarsus ans claws mingled with long light-brown hairs.

Male unknown.

Diagnosis. Pachyrhynchus neoabsurdus sp. nov. in general appearance is similar to all members of ‘’absurdus’’ group, but is easily distinguishable by: 1) unique pattern of body and scale color ( Fig. 1F ); 2) smaller body; 3)less extent apex; 4) lateral contour of elytra peak from middle to subapical part, with more gradual sinuation; 5) forehead with weaker impression; 6) shallow transverse groove before forehead.

Etymology. From first view this new species seems most distant member of ‘’absurdus’’ group, with characteristic for this group marking of scales as mayor sign of belonging. Reason for ‘’neo’’ before ‘’absurdus’’ in species name is new and unique general pattern for member of ‘’absurdus’’ group.

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