Euops coeruleus, 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 : 33-35

Euops coeruleus sp. n.

( Figs 9 , 38 , 64 , 97 , 117 , 119 , 146 , 157 , 181 , 223 )

Diagnosis

Male: Coloration largely ferruginous, but dorsal surface covered with bright bluish green to green metallic lustre. Male: Aedeagus with area of long, thin, centripetally directed setae between endophallic sclerites. TA with dorsal plate wider than the frame ( Fig. 97 ).

Range ( Fig. 223 ) Central Prov. (Daradae Plain). Elevation: 300 m.

Material examined

Holotype: PAPUA NEW GUINEA, Central Prov. , Daradae Plain, 80 km N to Pt. Moresby, 300 m, sweeping, 6.IX.1959, leg. T.C.Maa ( BPBM) . Paratypes: PAPUA NEW GUINEA, Central Prov .: 1 male, Daradae, nr. Javarere, Musgrove R., 100 m?, 3.X.1958, leg. J.L.Gressitt ( BPBM) ; 1 male, Daradae, nr. Javarere, Musgrove R., 100 m?, " Alpinia ", 4.X.1958, leg. J.L.Gressitt ( BPBM) .

Description

Holotype, male. Length, pronotum + elytron: 2.91 mm. Coloration ( Fig. 9 ) largely ferruginous unless covered by intense metallic lustre; pronotum, scutellum, elytron and pygidium almost completely covered by bluish­green lustre; anterior surface of procoxa, thorax and abdomen greenish golden; legs with only slight greenish­blue lustre; antennal funicle dark ferruginous, antennal club black. Head. As in Fig. 38 . Gena 0.86 X as long as width of head immediately behind eyes. Contours of genae in dorsal view markedly converging anteriad. Vertex dorsally subglabrous; laterally transversely rugulose, behind eye sparsely punctate. 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 weakly sculptured; median furrow vestigial, anteriorly almost smooth except for minute punctures near margin of eye, posteriorly with shallow transverse wrinkles. Rostrum 1.82 X as long as mouthparts; at widest point 1.41 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, sinuate to apex; ventrally on submentum with numerous long, stiff, suberect setae. Mouthparts. Prementum at base 1.6 X wider than long, ca. 2.4 X wider than at apex; with straight lateral margins converging apicad; apical processes subangulate, of equal length, on same level dorsoventrally. Antenna slender, as in Fig. 64 . Prothorax as long as wide (1.00 X); preapical constriction shallow; disc evenly convex, shining, at middle densely punctate; punctures weakly transversely rugose; sides with dense, deep punctures. Metanotum with pair of distinct lateral lobes. Elytron 2.23 X longer than wide; striae moderately impressed. Thoracic venter. Height of pterothorax 0.81 X length of elytron. Procoxa in anterior aspect 1.25 X as long as wide. Legs. Profemur subsymmetrically clavate, moderately swollen, thickest at 0.34 of length from apex, at base with indistinct stalk. Protibia evenly 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, 2.8 X as long as wide. Metatibia of similar size as mesotibia. Abdomen. Ventral contour anteriorly straight in lateral view, sternite VI projecting nose­like, 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 knob in front of posterior margin. Pygidium 0.91 X wider than long; at extreme base microreticulate, remainder shining; moderately densely, moderately deeply punctate. Genitalia. Apex of tergite VIII curved in evenly convex line. Sternite VIII as in Fig. 181 . Tegminal plate ( Fig. 119 ) with sides weakly converging apicad; apical edge subtruncate, densely setose with moderately long setae. Aedeagus. Apical scoop of pedon ( Fig. 157 ) ca. 1.18 X as long as wide, evenly rounded to apex, spoon­shaped. Tectum as in Fig. 146 ; lateral frame converging with straight sides to pointed apex; subapically with angulate lateral extensions. TA as in Fig. 97 ; transfer processes basally articulated inside of frame of TA, apically markedly projecting beyond frame´s apex; base of transfer processes within apical half of frame; with dorsal plate wider than the frame; internal support structures of ductus ejaculatorius short, not reaching level of basal sclerites; basal sclerites ca. 0.28 X of total length of TA. Cuticle of endophallus in apical 0.41 (of total length of aedeagus) with dense, subtriangular denticles; in mid portion with pair of elongate sclerites; between these sclerites with area of long, thin, centripetally directed setae ( Fig. 117 ).

Intraspecific variation Male length (pronotum + elytron): 2.56–2.91 mm (n=3, =2.71 ± 0.18). Prothorax 0.98–1.00 X as long as wide (n=3, =0.99 ± 0.01). Elytron 2.23–2.35 X longer than wide (n=3, =2.30 ± 0.06). Thoracic venter. Height of pterothorax 0.78–0.81 X length of elytron (n=3, =0.79 ± 0.02). Abdomen. Pygidium 0.91–0.93 X wider than long in males (n=3, =0.92 ± 0.01).

Etymological note

This epithet is based on the Latin adjective coeruleus (deep blue, deep green). It refers to the coloration of the species.

Figures

FIGURES 1–9. Habitus of Euops (Metaeuops) spp.: (1) E. coelestinus, male (Japen Isl.); (2) E. coelestinus, female lectotype; (3) E. violaceus, female lectotype; (4) E. illegalovi, holotype; (5) E. swartensis, holotype; (6) E. oops, holotype; (7) E. tenuiflagellaris, holotype; (8) E. judithae, holotype; (9) E. coeruleus, holotype. Scale lines 1 mm.

FIGURES 36–41. Head of Euops (Metaeuops) spp., in lateral aspect; males: (36) E. tenuiflagellaris, holotype; (37) E. curvipes, holotype; (38) E. coeruleus, holotype; (39) E. torricelliensis, holotype; (40) E. piceus, holotype; (41) E. paratibialis, holotype.

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