Euops biru, Riedel, 2006

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 : 46-48

Euops biru sp. n.

( Figs 13 , 29 , 59 , 95 , 116 , 126 , 138 , 158 , 183 , 215 , 223 )

Diagnosis

Coloration of dorsal surface intense blue. Disk of pronotum slightly dull, microreticulate. Male: TA as in Fig. 95 ; internal support structures of ductus ejaculatorius long, passing beyond level of basal sclerites. Female: Ventral contour of protibia subparallel to dorsal contour, weakly sinuate.

Range ( Fig. 223 ) Japen­Waropen Prov. (Japen Isl.). Elevation: 500–800 m.

Material examined

Holotype: WEST NEW GUINEA, Japen­Waropen Prov. , Japen Isl. , Serui, Mantembu, 100–500 m, 16.XII.2000, leg. A.Riedel ( MZB) . Paratypes: WEST NEW GUINEA, Japen­ Waropen Prov .: 1 male, Japen Isl. , Ambaidiru, 800 m, 8.IX.1991, leg. A.Riedel ( ARC) ; 1 male, Japen Isl. , Serui, Mantembu, 300–800 m, 6–9.IX.1991, leg. A.Riedel ( ARC) ; 2 males, 1 female (marked as “ allotype ”), same data as holotype ( ARC, MZB) .

Description

Holotype, male. Length, pronotum + elytron: 2.88 mm. Coloration ( Fig. 13 ) intense blue on dorsal surface; scutellum slightly more greenish; ventral surface and legs black with slight greenish to bluish lustre; antennal funicle dark ferruginous, antennal club black. Head. As in Fig. 29 . Gena 0.75 X as long as width of head immediately behind eyes. Contours of genae in dorsal view weakly converging anteriad. Vertex subglabrous; dorsally weakly microreticulate; laterally transversely rugulose, without punctures. Eyes in dorsal view weakly prominent from lateral contour of head. Profile of vertex with weak constriction immediately behind eye. Ventral surface of head in front of gular region weakly sculptured; with shallow median furrow, with sparse minute punctures, posteriorly with oblique­transverse wrinkles. Rostrum 1.96 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 sinuate line to apex; ventral contour subangulate with head (ca. 135°), in almost straight line to apex; ventrally on submentum subglabrous, with few short suberect setae. Mouthparts. Prementum at base 1.9 X wider than long, ca. 2.5 X wider than at apex; with straight lateral margins converging apicad; apical processes blunt, subangulate; median apical process retracted into more dorsal position. Antenna slender, as in Fig. 59 . Prothorax 0.99 X as long as wide; preapical constriction absent; disc evenly convex, microreticulate, impunctate; sides with dense, moderately deep punctures. Metanotum with pair of distinct lateral lobes. Elytron 2.28 X longer than wide; striae moderately impressed at base, becoming weakly impressed towards apex. Thoracic venter. Height of pterothorax 0.80 X length of elytron. Procoxa in anterior aspect 1.13 X as long as wide. Legs. Profemur subsymmetrically clavate, moderately swollen, thickest at 0.29 of length from apex, at base with indistinct stalk. Protibia in basal half straight, in apical half weakly curved ventrad; ventral contour slightly sinuate, subparallel to dorsal contour. Mesotibia dorsally before apex with subangulate lobe, its apical edge leading obliquely towards uncus; overall shape of tibia subtriangular. Mesotarsus straight, 2.6 X as long as wide. Metatibia of similar size as mesotibia. Abdomen. Ventral contour anteriorly straight in lateral view, sternite VI posteriorly roundly projecting, between sternite VI and VII with marked constriction. Ventral surface of sternite III subglabrous, sternites IV–VI sparsely setose with subrecumbent setae; sternite VI with swelling in front of posterior margin. Pygidium as long as wide (0.99 X); basal half microreticulate, apical half shining; moderately densely to sparsely punctate with moderately deep punctures. Genitalia. Apex of tergite VIII curved in evenly convex line. Sternite VIII as in Fig. 183 . Tegminal plate ( Fig. 126 ) with sides moderately converging apicad; apical edge subtruncate, densely setose with short setae. Aedeagus. Apical scoop of pedon ( Fig. 158 ) ca. 1.14 X as long as wide, with lateral margins weakly convex, converging, apex subangulate. Tectum as in Fig. 138 ; lateral frame basally subparallel, towards pointed apex converging; subapically with broad lateral arms. TA as in Fig. 95 ; sides of frame subparallel to apex; transfer processes basally articulated inside of frame of TA, approximately reaching frame´s apex; base of transfer processes at about middle of frame; without distinct dorsal plate; internal support structures of ductus ejaculatorius long, passing beyond level of basal sclerites; basal sclerites short, ca. 0.18 X of total length of TA. Cuticle of endophallus in apical 0.30 (of total length of aedeagus) with dense, subtriangular denticles, towards the base with minute sparse setae; in mid portion with pair of folded sclerites; between these sclerites with few setae such as the ones in the portion more apicad ( Fig. 116 ).

Allotype, female. Same as holotype except: length, pronotum + elytron: 2.50 mm. Head. Gena 0.73 X as long as width of head immediately behind eyes. Profile of vertex with shallow constriction immediately behind eye. Rostrum 1.64 X as long as mouthparts; at widest point 1.18 X wider than at base. Prothorax 0.90 X as long as wide. Disk at middle with very shallow transverse impression. Elytron 2.25 X longer than wide. Thoracic venter. Procoxa in anterior aspect 1.03 X as long as wide. Height of pterothorax 0.83 X length of elytron. Legs. Dorsal contour of profemur sinuate, in basal third straight, continuing in markedly convex line to apex. Protibia weakly curved; dorsal and ventral contour subparallel; ventral surface crenulate, densely setose with erect to suberect setae; tibial apex with uncus and distinct premucro; premucro in ventral position. Abdomen. Setose patch of venter 1.43 X as long as wide, consisting of 3 double rows of modified setae. Pygidium 1.13 X wider than long. Genitalia. Sternite VIII as in Fig. 200 . Tergite VIII apically subtruncate. Spermatheca as in Fig. 215 ; basally with long siphon­like extension; slender; somewhat tapering towards apex. Ductus spermathecae of the specimen lost.

Intraspecific variation

Male length (pronotum + elytron): 2.63–2.94 mm (n=5, =2.81 ± 0.12). Prothorax 0.94–0.99 X as long as wide (n=5, =0.97 ± 0.02). Elytron 2.23–2.29 X longer than wide (n=5, =2.27 ± 0.02). Thoracic venter. Height of pterothorax 0.78–0.80 X length of elytron (n=5, =0.80 ± 0.01). Abdomen. Pygidium 0.97–1.02 X wider than long in males (n=5, =1.00 ± 0.02).

Etymological note

This epithet is based on the Indonesian word “biru”, which means “blue”. It refers to the predominant color of the specimens. The name is to be treated as a noun in apposition.

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 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 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 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.