九州大学総合研究博物館研究報告第17号
Bulletin of the Kyushu University Museum
No.17, 2020, pp.109-114

A new species of the genus Pachyrhynchus Germar (Coleoptera,Curculionidae, Entiminae) from Southern Luzon, the Philippines
Hiraku YOSHITAKE
Kyushu Okinawa Agricultural Research Center (Itoman residence), NARO, 820 Makabe, Itoman, Okinawa, 901-0336 Japan.

Abstract: A new Pachyrhynchini species of the genus Pachyrhynchus Germar (Curculionidae, Entiminae), P. rochaorum sp.
nov., is described from Mt. Banahaw in the Calabarzon Region, Southern Luzon, the Philippines. This new species is similarto Pachyrhynchus gloriosus Faust, but can readily be distinguishable from the latter mainly by the elytral shape.
Key Word: taxonomy, description, broad-nosed weevil, wingless, the Philippine Islands.

Introduciton

new.

Pachyrhynchus gloriosus Faust, 1895 is a curculionid
weevil belonging to the tribe Pachyrhynchini, subfamily

Material and Methods

Entiminae. This species is known to occur in Luzon, the Philippines and classified into two subspecies, Pachyrhynchus glo-This study was based on specimens deposited in theriosus gloriosus and P. g. abbreviatus Schultze, 1922 (Schultze,Munetoshi Maruyama Collection at the Kyushu University1924), based on differences in scaly markings. The nomino-Museum, Fukuoka (MCKUM) and Hiraku Yoshitake Collec-typical subspecies was described from “nördlichen Theil dertion at the Institute fro Agro-Environmental Sciences, NARO,

Insel Luzon” (Faust, 1895), while P. g. abbreviatus was origi-Tsukuba (NIAES). In addition, the type specimens of related

nally described as a variety of P. gloriosus from “Provinztaxa were examined at the Senckenberg NaturhistorischesBontoc” (Schulze, 1922). Schultze (1924) noted its known

Sammlungen, Museum für Tierkunde, Dresden (SMTD). The

locality as “Mount Banahao” (= Mt. Banahaw located between

methods used in this study were the same as those explained in

the border of Laguna and Quezon province, Southern Luzon).

Yoshitake (2017). The holotype of the new species described

He raised P. g. var. abbreviatus to a subspecies of the species

herein is preserved in NIAES.

and noted its known localities as “Bontoc Subprovice” and“Kalinga Subprovince”, but did not mention morphologicaldifferences between the type specimen of P. gloriosus and theTaxonomy

examined specimens from Mt. Banahaw. Recenlty, I had anopportunity to examine a long series of specimens collected

Pachyrhynchus rochaorum sp. nov.

from the Quezon side of Mt. Banahaw. They appeared to be(Figs.1-8)

closely related to P. glorious, but differ in body shape from thespecies. After careful examination, I concluded that there is aDiagnosis. Pachyrhynchus rochaorum resembles P. glo-distinct species in Southern Luzon and describe it herein asriosus Faust, 1895 in general appearance, but is distinctive― 109 ―

Hiraku YOSHITAKE

Figs. 1-4. Habitus images of Pachyrhynchus rochaorum sp. nov. 1: Male in dorsal view; 2, ditto in lateral view; 3: female in dorsal view; 4, ditto inlateral view.

enough not to be confused with the latter in having the wider

Figs. 1 & 2.

and more strongly convex elytra whose lateral contour is more

Integument coppery to dark coppery red, partially withstrongly expanded to the widest point and then more rapidly

green sheen; antennae black but partially with coppery-redconvergent apicad. This new species is also similar to Pachy-sheen; elytra slightly darker; underside partially with green or

rhynchus moellendorffi Heller, 1899, which appears to be

purplish sheen. Body surface mostly shiny; elytra weakly shiny;closely related to P. gloriosus and was described by a female

underside mostly subopaque.

holotype from “Philippinen” with no information on its precise

Body sparsely minutely pubescent, with glittery, yellow-locality (Heller, 1899), but the female elytra are much wider

ish to pale green markings of recumbent round scales. Fore-and more strongly convex in P. rochaorum than in P. moellen-

head with widely ovate to lanceolate scaly patch on middle,

dorffi. Rukmane and Cabras (2018) regarded the locality of P.

which extends over and covers middle of base of rostrum. Lat-moellendorffi as Panay Island in the Western Visayas anderoventral parts of head and rostrum behind antennal scrobes

described a new subspecies, P. m. marinduquanus Rukmane &each with transverse subrectangular patch which is composedCabras, 2018, from Marinduque Island in the Mimaropaof general scales but fringed on periphery with smaller hair-Region, but P. rochaorum can readily be distinguished also

like to lanceolate ones; lateroventral parts of rostrum before

from P. m. marinduquanus by the body and vestiture color.

antennal scrobes with small patch of general scales, mingledDescription. Male. Dimensions (in mm): LB: 10.40-13.00

with smaller hair-like to lanceolate ones, and each furnished(holotype 10.40; mean 11.87); LR: 1.85-2.25 (1.85; 2.06); WR:with golden setae along apical margin. Prothorax with the fol-

1.63-1.98 (1.63; 1.83); LP: 3.50-4.28 (3.50; 3.94); WP: 3.83-

lowing markings of general scales: 1) longitudinal stripe on

4.83 (3.83; 4.31); LE: 7.00-8.70 (7.00; 8.00); WE: 5.20-6.40

each side of pronotum, which extends from before subbasal(5.20; 5.87). N = 5 for all measurements. Habitus as shown ingroove to just behind apex, arcuate internally, sometimes― 110 ―

A new species of the genus Pachyrhynchus Germar (Coleoptera, Curculionidae, Entiminae) from Southern Luzon, the Philippines

Figs. 5-8. Male genitalia of Pachyrhynchus rochaorum sp. nov. 5: Aedeagus in dorsal view; 6: ditto in lateral view; 7: sternites
VIII and IX in dorsal view; 8: tegmen in dorsal view. Scale bar: 1.00 mm.

interrupted subapically, and more or less gradually become

entire width except lateromarginal part but is often reduced onwidened toward both extremities; 2) fine transverse band along

sutural part in various degrees; 2) transverse band extending

apical margin, which sometimes becomes finer medially; 3)across middle, which is widened and arcuate posteriorly on

broad lateroventral stripe on each side, which extends fromside, and is sometimes interrupted medially; 3) small oblongbase to apex and whose upper margin is arcuate ventrally.

patch on subapical part of interval I, which is sometimes

Each elytron with the following markings of general scales: 1)

accompanied by another patch on interval II; 4) long stripetransverse band along basal margin, which extends acrossextending from subbasal to subapical parts of interval III,― 111 ―Hiraku YOSHITAKE

which is connected basally with marking 1) and intersectedwide, slightly longer than and as wide as II; segment II 1.55

medially with marking 2); 5) shorter stripe extending from sub-times as long as wide, 1.75 times as long as III; segments III-VI

basal to subapical parts between intervals IV and VII, which issubequal in length, nearly as long as wide; segment VII 1.25

connected basally with marking 1), intersected medially withtimes as long as VI, slightly wider than long; club subellipsoid,marking 2), and then strongly incurved apically, and finally1.77 times as long as wide, nearly as long as funicular seg-connected with marking 4); 6) lateral stripe extending fromments V-VII combined. Rostrum relatively slender, barely

subbasal part to just before apex, which is connected basally

longer than wide, LR/WR 1.07-1.17 (holotype 1.14, meanwith marking 5), medially with 2), and apically with 4). Fore1.13); dorsum moderately and finely punctured, foveate at

coxae each with transversely oblong patch of general scales on

middle of base, with broadly obtriangular concavity on basal

anterior parts, sparsely mingled with hair-like ones.

half, moderately bulging on apical half; apical bulge flattish

Femora each with two bands of general scales on subbasal

dorsally, slightly depressed on middle of basal part; dorsal

and subapical parts, mingled with smaller hair-like scales;

contour of frons and rostrum subcontinuous; dorsal contour ofscaly bands more or less interrupted posteriorly on fore femur

rostrum faintly arcuately declined from base to middle, thenbut anteriorly on mid and hid femora; subbasal band of fore

gradually raised from middle to apical 1/3, and finally arcu-

femur often obscure; mid and hind femora each with stripe of

ately declined to apex; lateral contour moderately dilated

general scales along posterior margin of basal part, mingledapicad; apicolateral corners invisible from above due to well-with smaller hair-like scales. Tibiae moderately covered withdeveloped pterygia; ventral surface simple, not convex along

fine hairs, fringed with light-colored hairs and sparse darker

midline. Prothorax subspherical, barely wider than long, WP/

setae along internal margins, more densely covered with longer

LP 1.08-1.13 (holotype 1.09, mean 1.09); dorsum moderately

setae apically. Prosternum mostly densely covered with generaland minutely punctured, moderately convex, simple on eachscales. Intercoxal portion of mesosternum densely coveredside, not costate basally; dorsal contour highest just behindwith general scales, mingled with hair-like ones. Mesepisterna

middle; lateral contour moderately to strongly dilated fromeach with elliptical scaly patch. Mesepimera immaculate.

strongly constricted base, widest just before middle, then more

Metasternum mostly densely covered with general scales

strongly convergent apicad, and finally weakly constricted just

except basal and apical marginal parts glabrous, sparsely

behind apex; basal margin subtruncate; apical margin subtrun-

mingled with smaller hair-like ones. Ventrite I with a pair ofcate or faintly arched anteriorly; subbasal groove entirely dis-transversely patches of general scales along apical margin,tinct; subapical groove become obscure dorsally. Elytra broadly

sparsely mingled with hair-like ones. Ventrites I and II each

subobovate, LE/WE 1.34-1.40 (holotype 1.35, mean 1.36),

with a pair of transverse patches of general scales along apicalnearly twice as long as prothorax, LE/LP 2.00-2.06 (2.00,margin, each of which is mainly composed of general scales2.03), moderately wider than prothorax, WE/WP 1.33-1.38

but sparsely mingled with hair-like ones; patches on ventrite I(1.36, 1.36), weakly striate-punctured, with flat coriaceous

subrectangular while those on ventrite II elliptical and often

intervals; dorsum moderately convex; dorsal contour highest

confluent with each other. Ventrites III and IV immaculate.

just before middle; lateral contour moderately arcuately dilated

Ventrite V immaculate, furnished with long suberect hairs on

from base to widest point at middle, then more strongly con-apical part.

vergent to faint subapical constrictions; apices separately shal-Head moderately and finely punctured; forehead flattish,

lowly rounded. Legs slender; femora moderately clavate;nearly 2.4 times as wide as eye width; eyes relatively small,anterior margins of fore femora and posterior margins of midmoderately convex from lateral contour of head; each eye

and hind femora moderately emarginate in subapical parts,

highest at middle. Antennae moderately slender, with scaperespectively; tibiae moderately incurved apicad, sparsely

moderate in length, nearly 0.9 times as long as funicle, moder-bluntly serrate along internal margins, sharply mucronate at

ately clavate; funicular segment I nearly 1.8 times as long asapices; apical mucrones large on fore legs, medium-sized on― 112 ―A new species of the genus Pachyrhynchus Germar (Coleoptera, Curculionidae, Entiminae) from Southern Luzon, the Philippines

mid legs, and small on hind legs. Metasternum and ventrite Ifriend, Munetoshi Maruyama.

conjointly depressed on disk; depression large but reachingapical margin of ventrite I at apex. Ventrite I rugose and finely
granulate on disk; each granule bearing fine short hair. Ventrite

Acknowledgments

II widely flattened and moderately minutely punctured. Ventrite V nearly twice as wide as long, weakly rugose, flattish butI thank Munetoshi Maruyama (KUM) for his cooperationslightly depressed on lateromarginal parts, widely truncate atso far in my study of the Pachyrhynchini and Naoko Nakahara

apex. Genitalia as illustrated (Figs. 5-8).

(Tsukuba) for her assistance while preparing the manuscript.

Female. Demensions (in mm): LB: 11.20-12.65 (meanMy thanks are also due to Olaf Jäger, Klaus-Dieter Klass, Mat-11.97); LR: 1.83-2.10 (1.95); WR: 1.70-1.98 (1.82); LP: 3.30-thias Nuss and Christian Schmidt (SMTD) for their support in

3.75 (3.57); WP: 3.70-4.45 (4.05); LE: 7.90-9.00 (8.40); WE:

specimen examinations.

5.83-6.75 (6.40). N = 5 for all measurements.
Rostrum LR/WR 1.06-1.09 (mean 1.07). Prothorax WP/
LP 1.09-1.22 (mean 1.13). Elytra LE/WE 1.26-1.36 (meanReferences1.31), much longer and wider than prothorax, LE/LP 2.24-2.47(2.35), WE/WP 1.51-1.65 (1.58); dorsum more strongly
convex; dorsal contour highest before middle; lateral contour
more strongly dilated apically from base to widest point, thenFaust, J., 1895. Einige neue Luzon-Curculioniden des Museum Tring.
Stettiner Entomologische Zaitung, 56: 3-21.
Heller, K. M., 1899. Neue Kafer von den Philippinen. Abhandlungender Berichte des Königlichen Zoologischen und Anthropologische-more sharply convergent to stronger subapical constrictions,and finally more acutely produced at apices. Conjoint depres-Ethnographischen Museums zu Dresden, 7 (8): 1-8.
Rukmane, A. and Cabras A. A., 2018. New and additional notes on thedistribution of Pachyrhynchus möllendorffi Heller, 1899

sion on metasternum and ventrite I shallower. Ventrite I not(Coleoptera, Curculionidae), with description of a new subspecies

granulate. Ventrite V slightly longer, nearly 1.8 times as widefrom the Marinduque Island (Philippines). Baltic Journal ofas long, more strongly depressed on lateromarginal parts; apex
much narrower, shallowly notched at middle. Otherwise,essentially as in male.
Type material. Holotype: male (NIAES), “[ PHILIP-Coleopterology, 18: 57-63.
Schultze, W., 1922. X. Beitrag zur Coleopteren Fauna der Philippinen.
Philippine Journal of Science, 21: 569-596 + 4 pls.
Schultze, W., 1924. A monograph of the pachyrrhynchid group of theBrachyderinae, Curculionidae: Part I. The genus Pachyrrhynchus

PINES: Luzon ] / Calabarzon region, Quezon, / Dolores, Brgy.

Germar. (Concluded.) Philippine Journal of Science, 24: 309-366

Kinabuhayan, Mt. Banahaw, 23. XII. 2016, / native collector+ 3 pls.

leg.” (typed on white card); “[ H O L O T Y P E ] Male / Pachy-Yoshitake, H., 2017. Six new taxa and a new synonym of the genus

rhynchus / rochaorum / Yoshitake, 2020” (typed on red card).

Pachyrhynchus Germar (Coleoptera, Curculionidae, Entiminae)
from the Philippines. Elytra (New Series), 7: 247-263.

Paratypes: 73 exs. from the type locality (MCKUM & NIAES).
Distribution. Philippines (Luzon: Calabarzon Region:Quezon province).
Etymology. This new species was named in honor ofJayson Rocha and his family (Dolores) for their courtesy to my― 113 ―

Received January 20, 2020; accepted March 1, 2020

Hiraku YOSHITAKE

フィリピン・ルソン島南部産カタゾウムシ属（コウチュウ目ゾウムシ科クチブトゾウムシ亜科）の１新種
吉武
（国研）
農研機構

啓

九州沖縄農業研究センター（糸満駐在）

要旨：カタゾウムシ族 Pachyrhynchini（ゾウムシ科クチブトゾウムシ亜科）に属するカタゾウムシ属 Pachyrhynchus Germarにフィリピン・ルソン島南部産の１新種を認め、P. rochaorum sp. nov. として命名し、記載した。本新種はルソン島北部から中部に分布する Pachyrhynchus gloriosus Faust, 1895に似るが、上翅がより幅広く、その輪郭は基部から中央までより強く広がり、その後より急に先端へ向かって狭まることなどにより後者とは容易に識別可能である。

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