Euops tibialis Voss, 1929

Riedel, Alexander, 2006, Revision of the subgenus Metaeuops Legalov of Euops Schoenherr (Coleoptera, Curculionoidea, Attelabidae) from the Papuan region, Zootaxa 1181 (1), pp. 1-102 : 54-57

Euops tibialis Voss

( Figs 81 , 87, 89 , 131 , 160, 161 , 185 , 187 , 202 , 219 , 224 )

Voss (1929): p. 220.

Diagnosis

Metatibia much larger than mesotibia (as in Fig. 20 ). Elytron at humerus with minute denticle. Male: TA of aedeagus ( Figs 87, 89 ) with long flagellum; sclerite­complex at base of flagellum in repose at angle (45°–90°) with apodeme of aedeagus. Apical scoop of pedon at apex with median extension ( Fig. 160 ). Tergite VIII apically with distinct notch. Female: Setose patch of venter consisting of 3 single rows of modified setae. Tergite VIII with sides converging towards concave apex. Length of ductus spermathecae plus spermatheca 3.8–4.3 X as long as tergite VIII.

Range ( Fig. 224 )

Sorong Prov. (Mysol), Manokwari Prov. (Arfak Mts., Wandammen Bay), Japen­ Waropen Prov. (Serui, Wapoga Riv.), Paniai Prov. (Epomani), Jayawijaya Prov. (Elelim), Western Prov. (Olsobip). Elevation: 100– 700 m.

Material examined

Lectotype, male (by present designation): WEST NEW GUINEA: Sorong Prov. , Mysol; labels: 1) [white, rectangular cardboard on which specimen is glued] "Mysol. [handwritten to left side of lower margin]" 2) [white, rectangular] "Sharp Coll, 1905­313 [printed]" 3) [white with red bordering, round] "Type [printed]" 4) [white, rectangular] " Euops tibialis n. sp. [handwritten] Det. E. Voss [printed]".

Other material examined: WEST NEW GUINEA, Manokwari Prov.: 1 male, 1 female, Ransiki ­ Anggi , 250–750 m, 25.VIII.1991, leg. A.Riedel ( ARC) ; 1 male, Wandammen Bay , Wasior, DMP logging camp, Km 38, Sararti, S 03° 05´E 134° 27´, 100–200 m, 7– 9.I.2001, leg. A.Riedel ( ARC) ; Japen­Waropen Prov.: 1 male, Japen Isl. , Serui, Mantembu, 300–800 m, 6–9.XI.1991, leg. A.Riedel ( ARC) ; 3 males, 1 female, Japen Isl. , Serui , Kontiunai, road to Ambaidiru, 600–700 m, 23.XII.2000, leg. A.Riedel ( ARC) ; 1 male, Japen Isl. , Serui , Kontiunai, road to Ambaidiru, 600–700 m, 25.XII.2000, leg. A.Riedel ( ARC) ; 1 male, Wapoga Riv. , Kwadewa, logging road, Km 80, ca. 100 m, 1–2.III.1999, leg. A.Riedel ( ARC) ; Paniai Prov.: 3 males, 2 females (1 marked “selected female specimen”), Epomani , Km 145, 550– 750 m, 15–16.I.1996, leg. A.Riedel ( ARC) ; 2 males, Epomani , Km 165, 700– 800 m, 17.I.1996, leg. A.Riedel ( ARC) ; 1 female, Ugida , Km 177, 29.VII.1996, leg. Stüben / Schüle ( PSC) ; Jayawijaya Prov.: 2 males, 1 female, Elelim , Km 132 NE Wamena, 500–750 m, 18.XII.2004 ( ARC) . PAPUA NEW GUINEA, Western Prov. : Fly Riv., Olsobip, 400–600 m, VIII.1969, leg. J.&M.Sedlacek ( BPBM) ; Redescription

Holotype, male. Length, pronotum + elytron: 3.08 mm. Coloration (as in Fig. 18 ) largely black; rostrum, tibiae, tarsi and abdomen ferruginous; elytron at base black with bluish oily lustre, towards apex becoming deep ferruginous; scutellum black without bluish lustre; funicle and club of antenna light ferruginous. Head. Gena 0.76 X as long as width of head immediately behind eyes. Contours of genae in dorsal view markedly converging anteriad. Vertex subglabrous, dorsally microreticulate, without punctures. Eyes in dorsal view almost continuous with lateral contour of head. Profile of vertex without constriction behind eye. Ventral surface of head in front of gular region smooth, without median furrow. Rostrum 2.13 X as long as mouthparts; at widest point 1.50 X wider than at base; in profile dorsal contour above antennal insertion with weak rounded prominence, anteriorly in weakly convex line to apex; ventral contour continuous with head, weakly sinuate to apex; ventrally on submentum with numerous long, stiff, suberect setae. Mouthparts. Prementum at base 1.7 X wider than long, ca. 2.6 X wider than at apex; with straight lateral margins converging apicad; apical processes long, acute, of equal length, on same level dorsoventrally. Antenna slender, similar as in Fig. 71 . Prothorax 0.83 X as long as wide; preapical constriction absent; disc evenly convex, microreticulate, impunctate; sides with few, large, shallow punctures. Metanotum with pair of distinct lateral lobes. Elytron 2.16 X longer than wide; at humerus with minute denticle; striae moderately impressed at base, becoming effaced towards apex. Thoracic venter. Height of pterothorax 0.81 X length of elytron. Procoxa in anterior aspect 1.07 X as long as wide; externally with spine projecting dorsad, supporting base of profemur when in obliquely dorsad position (as in Fig. 19 ). Trochanter of foreleg ventrally pointed, projecting beyond base of femur. Legs. Profemur strongly asymmetrically clavate, strongly swollen, thickest at 0.40 of length from apex; with distinct stalk in basal 0.29; at middle of basal stalk dorsal edge with angulate extension, femur seemingly bent ventrad; ventral surface in apical quarter with very low knob opposing tibia. Protibia evenly moderately curved ventrad; ventral contour parallel to dorsal contour. Mesotibia on posterior surface subapically with indistinct, posteriad directed carina. Mesotarsus ( Fig. 81 ) relatively short, markedly curved anteriad, 2.0 X as long as wide. Metatibia (as Fig. 20 ) with greatly enlarged lateral surface, in apical quarter dorsally broadly rounded; much larger than mesotibia; posterior (inner) surface with dense, suberect, black setae. Abdomen. Ventral contour anteriorly straight in lateral view, evenly rounded to constriction between sternite VI and VII. Venter subglabrous; sternite VI without median knob or swelling in front of posterior margin. Pygidium as long as wide (0.99 X); microreticulate throughout; densely, moderately deeply punctate; densely, moderately deeply punctate; sparsely setose with inconspicuous, recumbent setae. Genitalia. Tergite VIII apically with distinct notch. Sternite VIII as in Fig. 185 ; base markedly bisinuate. Tegminal plate ( Fig. 131 ) broad, with sides weakly converging towards apex; apical edge rounded, glabrous; subapically on ventral surface with 2 densely setose patches of long setae. Aedeagus ( Fig. 87 ). Apical scoop of pedon ( Fig. 160 ) ca. 0.90 X as long as wide; lateral margins converging in sinuate line; apex with finger­like, median extension. Tectum ( Fig. 161 ) with lateral frame in basal half converging, in apical half subparallel to broad subangulate apex; subapically with angulate lateral extensions. TA as in Figs 87, 89 ; consisting of tubuliform, undivided flagellum; frame of TA transformed into sclerite resembling an inverted U, positioned in basal third of aedeagus, functionally detached of ductus ejaculatorius / flagellum­complex; flagellum long and thin, contained in basal 2/3 of aedeagus; without distinct dorsal plate; internal support structures of ductus ejaculatorius minute, weakly projecting over somewhat compact sclerite­complex at base of flagellum ( Fig. 89 ). Cuticle of endophallus without denticles or setae; within aedeagal body with subrectangular, weakly sclerotized sclerite; further in front with pair of elongate, weakly sclerotized sclerites.

Selected female specimen (Epomani). Same as holotype except: length, pronotum + elytron: 3.38 mm. Head with gena 0.84 X as long as width of head immediately behind eyes. Profile of vertex without constriction behind eye. Rostrum 1.66 X as long as mouthparts; at widest point 1.45 X wider than at base. Prothorax 0.87 X as long as wide. Disk at middle without transverse impression. Elytron 2.15 X longer than wide. Thoracic venter. Height of pterothorax 0.83 X length of elytron. Procoxa in anterior aspect 0.86 X as long as wide. Legs. Profemur moderately swollen; weakly asymmetrically clavate; basal stalk indistinct, without angulation, its dorsal edge lined with weak denticles; dorsal contour straight at very base, continuing in evenly convex line to apex; ventral contour in straight line to angulation at apical 0.29, continuing weakly concave to apex; ventral surface smooth, without protrusion. Protibia straight; ventral contour bisinuate, basally and apically concave, at middle convex; ventral surface weakly denticulate at middle, densely setose with suberect setae; tibial apex with uncus and distinct premucro; premucro in ventral position. Abdomen. Setose patch of venter 0.85 X as long as wide, consisting of 3 single rows of modified setae. Pygidium 1.14 X wider than long. Genitalia ( Fig. 187 ). Sternite VIII as in Fig. 202 . Tergite VIII with sides apicad converging; apex concave. Spermatheca as in Fig. 219 ; basally with long siphon­like extension subequal in length to remainder of spermatheca; this siphon internally annulate; body tapering towards pointed apex; spermathecal gland heavily sclerotized. Length of ductus spermathecae plus spermatheca 3.9 X as long as tergite VIII.

Intraspecific variation

Length, pronotum + elytron: males 2.67–3.53 mm (n=19, =3.00 ± 0.21); females 2.92–3.40 mm (n=6, =3.15 ± 0.20). Prothorax 0.83–0.89 X as long as wide in males (n=19, =0.86 ± 0.02), 0.84–0.87 X as long as wide in females (n=6, =0.85 ± 0.01). Elytron 2.07–2.27 X longer than wide in males (n=19, =2.15 ± 0.04), 2.04–2.16 X longer than wide in females (n=6, =2.12 ± 0.05); humeral denticle more or less distinct, but present in all specimens; striae moderately or weakly impressed at base. Thoracic venter. Height of pterothorax 0.78–0.89 X length of elytron in males (n=19, =0.82 ± 0.02), 0.83–0.89 X length of elytron in females (n=6, =0.85 ± 0.03). Abdomen. Pygidium 0.97–1.09 X wider than long in males (n=17, =1.02 ± 0.04), 1.05–1.19 X wider than long in females (n=6, =1.13 ± 0.05). Female patch of modified setae 0.84– 1.10 X as long as wide (n=6, =0.91 ± 0.10). Male genitalia: Base of sternite VIII angulate or rounded. Female genitalia. Sternite VIII apically subtruncate or rounded, evenly setose, or at middle less setose than laterally; medioapical weakly sclerotized area more or less extensive. Length of ductus spermathecae plus spermatheca 3.8–4.3 X as long as tergite VIII (n=5, =4.0 ± 0.20).

Nomenclatural note

Voss (1929) did not designate a holotype in the original description, nor did he make a statement about the number of specimens examined. One syntype could be located, but additional ones may exist. To ensure stability of nomenclature a lectotype is designated herein. This step is especially important because a sibling species exists which is easily confused with E. tibialis .

Figures

FIGURES 81–83. Mesotarsus of Euops (Metaeuops) spp., males: (81) E. tibialis (Ransiki Anggi); (82) E. paratibialis, holotype; (83) E. coelestinus (Epomani). Scale lines 200 µm. Arrow: note shape of first tarsomere.

FIGURES 87–90. Male genitalia of Euops (Metaeuops) spp.; aedeagus in dorsal aspect; (87) E. tibialis (Epomani); (88) E. paratibialis, paratype (Emdoman). TA in lateral aspect; (89) E. tibialis (Epomani); (90) E. paratibialis, paratype (Emdoman). Scale lines 100 µm.

FIGURES 131–135. Male genitalia of Euops (Metaeuops) spp.; dorsal plate of tegmen in dorsal aspect; (131) E. tibialis, lectotype; (132) E. paratibialis, holotype; (133) E. piceus, holotype; (134) E. judithae, holotype; (135) E. tenuiflagellaris, holotype. Scale lines 100 µm.

FIGURES 160–169. Male genitalia of Euops (Metaeuops) spp.; (160, 162, 164, 166, 168) pedon of aedeagus in ventral aspect; (161, 163, 165, 167, 169) tectum of aedeagus in dorsal aspect; (160– 161) E. tibialis, lectotype; (162–163) E. paratibialis, holotype; (164–165) E. judithae, holotype; (166–167) E. tenuiflagellaris, holotype; (168–169) E. piceus, holotype. Scale lines 100 µm.

FIGURES 170–186. Male sternite VIII of Euops (Metaeuops) spp.; (170) E. coelestinus (Ransiki); (171) E. torricelliensis, holotype; (172) E. oops, holotype; (173) E. illegalovi, holotype; (174) E. tenuiflagellaris, holotype; (175) E. judithae, holotype; (176) E. swartensis, holotype; (177) E. ratcliffei, holotype; (178) E. arfakensis, holotype; (179) E. curvipes, holotype; (180) E. dintelmanni, holotype; (181) E. coeruleus, holotype; (182) E. ruficornis (Wau); (183) E. biru, holotype; (184) E. piceus, holotype; (185) E. tibialis, lectotype; (186) E. paratibialis, holotype. Scale lines 100 µm.

FIGURES 187–188. Female genitalia of Euops (Metaeuops) spp., in ventral aspect: (187) E. tibialis (Epomani); (188) E. coelestinus (Wasior). Scale lines 200 µm. d.s. = ductus spermathecae, od = oviduct, s = spermatheca, r = rectum, st. VIII = sternite VIII, t. VIII = tergite VIII.

FIGURES 189–202. Female sternite VIII of Euops (Metaeuops) spp.; (189) E. coelestinus (Wasior); (190) E. coelestinus lectotype; (191) E. violaceus, lectotype; (192) E. swartensis, allotype; (193) E. tenuiflagellaris, allotype; (194) E. judithae, allotype; (195) E. illegalovi, allotype; (196) E. ratcliffei, allotype; (197) E. curvipes, allotype; (198) E. ruficornis, lectotype; (199) E. dintelmanni, allotype; (200) E. biru, allotype; (201) E. piceus, allotype; (202) E. tibialis (Epomani); (203) E. paratibialis, allotype. Scale lines 100 µm.

FIGURES 204–219. Spermatheca of Euops (Metaeuops) spp.; (204) E. coelestinus, lectotype; (205) E. coelestinus (Japen Isl.); (206) E. coelestinus (Wasior); (207) E. swartensis, allotype; (208) E. illegalovi, allotype; (209) E. violaceus, lectotype; (210) E. ruficornis, lectotype; (211) E. tenuiflagellaris, allotype; (212) E. judithae, allotype; (213) E. ratcliffei, allotype; (214) E. dintelmanni, allotype; (215) E. biru, allotype; (216) E. curvipes, allotype; (217) E. piceus, allotype; (218) E. paratibialis, allotype; (219) E. tibialis (Epomani). Scale lines 100 µm.

FIGURES 223–225. Distribution of Euops (Metaeuops) spp. Areas above 1000 m are shaded.

FIGURES 19–23. Euops paratibialis: (19) male (Borme), procoxa and base of foreleg; (20) male (Borme), metatibia. (21­22) female (Emdoman), patch of modified setae on abdominal venter; note that double rows of modified setae have merged to single rows; (23) male (Borme), everted transfer apparatus of genitalia.

FIGURES 10–18. Habitus of Euops (Metaeuops) spp.: (10) E. ruficornis, female lectotype; (11) E. ruficornis, male (Torricelli Mts.); (12) E. curvipes, holotype; (13) E. biru, holotype; (14) E. ratcliffei, holotype; (15) E. arfakensis, holotype; (16) E. dintelmanni, holotype; (17) E. piceus, holotype; (18) E. paratibialis, male (Japen Isl.). Scale lines 1 mm.

FIGURES 56–72. Antenna of Euops (Metaeuops) spp.: (56) E. torricelliensis, holotype; (57) E. oops, holotype; (58) E. arfakensis, holotype; (59) E. biru, holotype; (60) E. illegalovi, holotype; (61) E. tenuiflagellaris, holotype; (62) E. judithae, holotype; (63) E. swartensis, holotype; (64) E. coeruleus, holotype; (65) E. dintelmanni, holotype; (66) E. piceus, holotype; (67) E. curvipes, holotype; (68) E. ratcliffei, holotype; (69) E. coelestinus (Ransiki); (70) E. ruficornis, lectotype; (71) E. paratibialis, holotype; (72) E. violaceus, lectotype. Scale lines 200 µm.