Euops ruficornis Voss, 1956

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 : 40-43

Euops ruficornis Voss

( Figs 10–11 , 35 , 48 , 70 , 94 , 110 , 122 , 142 , 159 , 182 , 198 , 210 , 221 )

Voss (1956): p. 124.

Diagnosis

Elytra ferruginous or piceous, with or without slightly bluish to bronze lustre. Scutellum greenish bronze; anterior surface of procoxae ferruginous or, at most, with slight bluish lustre. Male: Apical scoop of pedon with subangulate apex. TA as in Fig. 94 ; internal support structures of ductus ejaculatorius long, passing beyond mid­level of basal sclerites, but not reaching the basal sclerites´ apical level.

Range ( Fig. 221 )

East Sepik Prov. (Torricelli Mts.), Madang Prov. (Erima), Morobe Prov. ( Salawaket Range , Wau ), Central Prov. ( Brown River , Goilala ). Elevation : 50–1700 m .

Material examined

Lectotype, female: PAPUA NEW GUINEA, Madang Prov., Erima; labels: 1) [white, rectangular] "Erima, Astrolabe B. [printed]" 2) [white, rectangular] " N. Guinea, Biró 97. [printed]" 3) [white with red bordering, rectangular] " Holotypus [printed with red ink] 1955 [printed], Euops femoralis ab. ruficornis Voss " 4) [white, rectangular] " Euops femoralis m. f. n. ruficornis [handwritten] E. Voss det, 1955 [printed]" ( HNHM).

Other material examined: PAPUA NEW GUINEA, East Sepik Prov.: 1 male, Torricelli Mts., Wantipi Vill. , 30.XI.–8.XII.1958, leg. W.W.Brandt ( BPBM) ; Madang Prov.: 2 males, 2 females, Baitabag village , 145° 46´E, 5° 08´S, 50 m, primary & secondary forest, 9.X.2002, leg. G.P.Setliff ( GPSC) ; 1 male, Wannang village , 145° 11´E, 5° 13´S, 115 m, primary & secondary forest, 1.XII.2002, leg. G.P.Setliff ( GPSC) ; 3 males, 1 female, Wannang village , 145° 11´E, 5° 13´S, 115 m, primary & secondary forest, 9–15.XII.2002, leg. G.P.Setliff ( GPSC) ; Morobe Prov.: 1 male, Salawaket Range, Lambaeb , 900 m, 18.IX.1956, leg. E.J.Ford jr. ( BPBM) ; 1 female, Salawaket Range, Lambaeb , 900 m, 19.IX.1956, leg. E.J.Ford jr. ( BPBM) ; 2 males, 1 female, Wau , 1300 m, 27.VII.1961, leg. J.Sedlacek ( BPBM) ; 1 male, Wau , 1200 m, 30.VII.1961, leg. J.&M.Sedlacek ( BPBM) ; 1 male, Wau , 1200 m, 31.VII.1961, leg. J.H.Sedlacek ( BPBM) ; 1 male, Wau , 1250 m, 9.VIII.1961, "grasses", leg. J.Sedlacek ( BPBM) ; 1 male, 1 female, Wau , 1250–1300 m, 20.VIII.1961, leg. J.Sedlacek ( BPBM) ; 1 male, Wau , 1200 m, 7.IX.1961, leg. J.Sedlacek ( BPBM) ; 3 males (1 marked “selected male specimen”), Wau , 1200 m, 11.IX.1961, leg. J.Sedlacek ( BPBM) ; 1 male, Wau , 1050 m, 19.IX.1961, leg. J.Sedlacek ( BPBM) ; 1 female, Wau , 1500 m, 24.IX.1961, leg. J.Sedlacek ( BPBM) ; 1 male, Wau , 1500 m, 24.IX.1961, leg. J. Sedlacek ( BPBM) ; 1 male, Wau , 1150–1600 m, 9.II.1968, leg. J.Sedlacek ( BPBM) ; 1 male, Wau , 1250 m, 24.III.1969, "Macaranga 4­glandulosa", leg. J.Sedlacek ( BPBM) ; 1 male, Mt. Missim , 980 m, 20.VII.1969, Malaise trap, leg. L.Gressitt & Kirashima ( BPBM) ; 1 male, 6 km W of Wau, Nami Creek , 1700 m, 15.VI.1962, leg. J.Sedlacek ( BPBM) ; Central Prov .: 1 male, Owen Stanley range, Goilala, Tapini , 975 m, 16–25.XI.1957, leg. W.W.Brandt ( BPBM) ; 3 males, 3 females, Owen Stanley range, Goilala, Loloipa , 25.XI–10.XII.1957, leg. W.W.Brandt ( BPBM) ; 1 male, Daradae Pl´n , 80 km N of Pt. Moresby, 500 m, sweeping, 6.IX.1959, leg. T.C.Maa ( BPBM) ; 1 male, Brown River , 5.XI.1960, "misc. palms", leg. J.L.Gressitt ( BPBM) .

Redescription

Selected male specimen (Wau). Length, pronotum + elytron: 3.03 mm. Coloration ( Fig. 11 ) black with bluish to bronze lustre; scutellum with slight greenish lustre; antennal funicle ferruginous, club black. Head. As in Fig. 35 . Gena 0.95 X as long as width of head immediately behind eyes. Contours of genae in dorsal view markedly converging anteriad. Vertex dorsally subglabrous; laterally behind eye sparsely punctate, posteriorly transversely rugulose. Eyes in dorsal view moderately prominent, set off from lateral contour of head. Profile of vertex with marked constriction immediately behind eye. Ventral surface of head in front of gular region markedly sculptured; with deep median furrow, anteriorly with sparse deep punctures becoming denser near eye, posteriorly with transverse wrinkles. Rostrum 1.96 X as long as mouthparts; at widest point 1.51 X wider than at base; in profile dorsal contour above antennal insertion with weak rounded prominence, anteriorly in sinuate line to apex; ventral contour continuous with head, in sinuate line to apex; ventrally on submentum subglabrous, with few short suberect setae. Mouthparts. Prementum [described from different specimen] at base 1.6 X wider than long, ca. 3.0 X wider than at apex; with straight lateral margins converging apicad; apical processes subangulate, of equal length, median apical process retracted into more dorsal position. Antenna slender, as in Fig. 70 . Prothorax 1.01 X as long as wide; preapical constriction shallow; disc evenly convex, shining, impunctate; sides with dense, deep punctures. Metanotum laterally roof­like extended and subangularly projecting, but without distinct lateral lobes. Elytron 2.36 X longer than wide; striae weakly impressed. Thoracic venter. Height of pterothorax 0.77 X length of elytron. Procoxa in anterior aspect 1.20 X as long as wide. Legs. Profemur subsymmetrically clavate, moderately swollen, thickest at 0.32 of length from apex, at base with indistinct stalk. Protibia evenly weakly curved ventrad; ventral contour parallel to dorsal contour. Mesotibia dorsally before apex with subangulate lobe, its apical edge leading obliquely towards uncus; overall shape of tibia subtriangular. Mesotarsus straight, 2.9 X as long as wide. Metatibia of similar size as mesotibia. Abdomen. Ventral contour anteriorly weakly concave in lateral view, sternite VI projecting bluntly angulate, with marked constriction between sternite VI and VII. Ventral surface of sternite III subglabrous, sternites IV–VI laterally with sparse subrecumbent setae, medially subglabrous; sternite VI with median swelling in front of posterior margin. Pygidium as long as wide (1.00 X); at extreme base microreticulate, remainder shining; in basal half, especially laterally, densely and deeply punctate, medially and towards apex punctures shallower and sparser. Genitalia. Apex of tergite VIII curved in evenly convex line. Sternite VIII as in Fig. 182 . Tegminal plate ( Fig. 122 ) with sides moderately converging apicad; apical edge subtruncate, densely setose with short setae. Aedeagus. Apical scoop of pedon ( Fig. 159 ) ca. 1.52 X as long as wide, with lateral margins converging in straight line; apex subangulate. Tectum as in Fig. 142 ; lateral frame converging with sinuate sides to pointed apex; subapically without extensions. TA as in Fig. 94 ; apex of frame wider than base; transfer processes basally articulated inside of frame of TA, approximately reaching frame´s apex; base of transfer processes within basal half of frame; without distinct dorsal plate; internal support structures of ductus ejaculatorius long, passing mid­level of basal sclerites; basal sclerites ca. 0.34 X of total length of TA. Cuticle of endophallus in apical 0.50 (of total length of aedeagus) with dense, subtriangular denticles; in mid portion with pair of folded sclerites; between these sclerites with few denticles such as the ones in apical portion ( Fig. 110 ).

Lectotype, female. Same as described male except: length, pronotum + elytron: 2.68 mm. Coloration ( Fig. 10 ) ferruginous except base of head black with bluish lustre, scutellum metallic green; antennal club black, funicle light ferruginous. Head. As in Fig. 48 . Gena 0.74 X as long as width of head immediately behind eyes. Profile of vertex behind eye straight, towards base rounded. Rostrum 1.86 X as long as mouthparts; at widest point 1.40 X wider than at base. Prothorax 0.97 X as long as wide. Disk at middle with very shallow transverse impression. Elytron 2.28 X longer than wide. Thoracic venter. Height of pterothorax 0.80 X length of elytron. Procoxa in anterior aspect 1.23 X as long as wide. Legs. Dorsal contour of profemur sinuate, in basal third straight, continuing in markedly convex line to apex. Protibia straight; ventral contour sinuate, basal half convex, apical half concave; ventral surface smooth except crenulate at middle, densely setose with subrecumbent to suberect setae; tibial apex with uncus and distinct premucro; premucro in ventral position. Abdomen. Setose patch of venter 1.22 X as long as wide, consisting of 3 double rows of modified setae. Pygidium 1.10 X wider than long. Genitalia. Sternite VIII as in Fig. 198 . Tergite VIII apically rounded. Spermatheca as in Fig. 210 ; basally with long siphon­like extension; slender; subisodiametric from insertion with gland to shortly before apex. Length of ductus spermathecae plus spermatheca 2.4 X as long as tergite VIII.

Intraspecific variation

Length, pronotum + elytron: males 2.02–3.03 mm (n=30, =2.65 ± 0.27); females 2.13–3.09 mm (n=11, =2.60 ± 0.31); specimens from Madang province usually smaller than average. Coloration ranging from light ferruginous with bluish head to completely black with bluish lustre; in the majority of fully hardened specimens from the highlands at least elytra ferruginous; specimens from Madang (except for holotype) darker, piceous with oily bluish lustre. Prothorax 0.94–1.02 X as long as wide in males (n=22, =0.99 ± 0.02), 0.93–0.98 X as long as wide in females (n=7, =0.96 ± 0.02). Elytron 2.09–2.45 X longer than wide in males (n=29, =2.34 ± 0.09), 2.20–2.46 X longer than wide in females (n=11, =2.32 ± 0.07); specimens from Madang province usually with elytra shorter than average. Thoracic venter. Height of pterothorax 0.69–0.82 X length of elytron in males (n=24, =0.77 ± 0.03), 0.75–0.82 X length of elytron in females (n=8, =0.79 ± 0.03). Abdomen. Contour of male venter usually somewhat concave, but almost flat in specimens from Madang province. Pygidium 0.88–1.03 X wider than long in males (n=19,

=0.94 ± 0.04), 1.02–1.13 X wider than long in females (n=8, =1.07 ± 0.05). Female patch of modified setae 1.11–1.50 X as long as wide (n=8, =1.31 ± 0.14).

Nomenclatural note

Voss (1956) 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.

Figures

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 26–35. Head of Euops (Metaeuops) spp., in lateral aspect; males: (26) E. ratcliffei, holotype; (27) E. arfakensis, holotype; (28) E. illegalovi, holotype; (29) E. biru, holotype; (30) E. oops, holotype; (31) E. swartensis, holotype; (32) E. judithae, holotype; (33) E. dintelmanni, holotype; (34) E. coelestinus (Ransiki); (35) E. ruficornis (Wau). Scale lines 500 µm.

FIGURES 46–55. Head of Euops (Metaeuops) spp., in lateral aspect; females: (46) E. violaceus, lectotype; (47) E. coelestinus, lectotype; (48) E. ruficornis, lectotype; (49) E. ratcliffei, holotype; (50) E. dintelmanni, allotype; (51) E. tenuiflagellaris, allotype; (52) E. curvipes, allotype; (53) E. illegalovi, allotype; (54) E. piceus, allotype; (55) E. paratibialis (Emdoman). Scale lines 500 µm.

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.

FIGURES 94–97. Male genitalia of Euops (Metaeuops) spp.; transfer apparatus of aedeagus in dorsal aspect (left) and lateral aspect (right); (94) E. ruficornis, (Wau); (95) E. biru, holotype; (96) E. curvipes, holotype; (97) E. coeruleus, holotype. Scale lines 100 µm. b.s. = basal scerite, b.tr.pr. = base of transfer processes, d.e. = ductus ejaculatorius, d.pl. = dorsal plate, f = frame of TA, sup.st. = support structures, tr.pr. = transfer processes.

FIGURES 110–118. Male genitalia of Euops (Metaeuops) spp.; mid portion of endophallus with endophallic sclerites and field of centripetal setae if present; (110) E. ruficornis (Wau); (111) E. dintelmanni, holotype; (112) E. curvipes, holotype; (113) E. judithae, holotype; (114) E. illegalovi, holotype; (115) E. torricelliensis, holotype; (116) E. biru, holotype; (117) E. coeruleus, holotype; (118) E. ratcliffei, holotype. Scale lines 50 µm.

FIGURES 119–130. Male genitalia of Euops (Metaeuops) spp.; dorsal plate of tegmen in dorsal aspect; (119) E. coeruleus, holotype; (120) E. torricelliensis, holotype; (121) E. illegalovi, holotype; (122) E. ruficornis (Wau); (123) E. oops, holotype; (124) E. swartensis, holotype; (125) E. dintelmanni, holotype; (126) E. biru, holotype; (127) E. arfakensis, holotype; (128) E. curvipes, holotype; (129) E. ratcliffei, holotype; (130) E. coelestinus (Ransiki). Scale lines 100 µm.

FIGURES 136–147. Male genitalia of Euops (Metaeuops) spp.; tectum of aedeagus in dorsal aspect; (136) E. torricelliensis, holotype; (137) E. dintelmanni, holotype; (138) E. biru, holotype; (139) E. curvipes, holotype; (140) E. ratcliffei, holotype; (141) E. oops, holotype; (142) E. ruficornis (Wau); (143) E. coelestinus (Ransiki); (144) E. swartensis, holotype; (145) E. illegalovi, holotype; (146) E. coeruleus, holotype; (147) E. arfakensis, holotype. Scale lines 100 µm.

FIGURES 148–159. Male genitalia of Euops (Metaeuops) spp.; pedon of aedeagus in ventral aspect; (148) E. arfakensis, holotype; (149) E. torricelliensis, holotype; (150) E. coelestinus (Ransiki); (151) E. curvipes, holotype; (152) E. swartensis, holotype; (153) E. dintelmanni, holotype; (154) E. ratcliffei, holotype; (155) E. oops, holotype; (156) E. illegalovi, holotype; (157) E. coeruleus, holotype; (158) E. biru, holotype; (159) E. ruficornis (Wau). 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 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 220–222. Distribution of Euops (Metaeuops) spp. Areas above 1000 m are shaded.