Euops (Metaeuops), Legalov

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 : 6-9

The subgenus Metaeuops Legalov of Euops Schoenherr , NEW RANK.

Type species: Euops tibialis Voss , by original designation ( Legalov, 2003).

Diagnosis

Head with large, medially contiguous eyes; males usually with marked constriction behind eyes (with weak constriction in E. biru and E. ratcliffei ; without constriction in E. tibialis and E. paratibialis ). Antenna slender, sometimes funicle of ferruginous color. Proventriculus densely covered with long setae; without sclerotized gnathal ridges. Sides of pronotum usually densely punctate. Male: Mesotibia with subangulate lobe dorsally before apex, thus overall shape of tibia subtriangular (lobe inconspicuous / absent in E. tibialis , E. paratibialis , E. curvipes ). Endophallus in mid portion with pair of elongate sclerites. Female: Setose patch of venter consisting of 3 double rows of modified setae (in E. tibialis and E. paratibialis each double row fused into a single row). Spermatheca often extended siphon­like towards ductus.

Range

New Guinea and surrounding islands (Biak Isl., Ceram Isl., Japen Isl., Mysol Isl.). Elevational range: 14–1700 m.

Description

Males ( Figs 1–18 ). Length, pronotum + elytron: 2.25–4.38 mm. Coloration. Vivid metallic (blue or green), or black, with or without metallic lustre. Head. Contours of genae in dorsal view markedly converging anteriad (weakly converging in E. biru and E. piceus ). Vertex shining (weakly microreticulate in E. tibialis and E. biru ), without macrosculpture or only with indistinct macrosculpture; dorsally smooth or with fine, shallow, transverse wrinkles behind and in front of the median convexity; laterally behind eye sparsely punctate or without punctures. Eyes large, dorsally contiguous at middle for 0.4–0.5 X their length. Profile of vertex with constriction behind eye (constriction absent in E. tibialis and E. paratibialis ), posteriorly convex towards base. Ventral surface of head in front of gular region shining; usually with median furrow, punctate, posteriorly with fine transverse wrinkles ( E. tibialis and E. paratibialis : without median furrow, smooth). Rostrum 1.77–2.30 X as long as mouthparts; in dorsal view with lateral contours subparallel to slightly beyond antennal insertion, anteriorly diverging until subapically rounded; at widest point 1.38–1.54 X wider than at base; in cross section dorsally weakly rounded. Clypeus medially with simple notch. Antennal insertion within basal fifth of rostrum. In dorsal view interantennal area converging anteriad with bisinuate margins (in E. curvipes : with distinct constriction at antennal insertion). Profile of rostrum above antennal insertion with weak, rounded prominence (this prominence very indistinct in E. arfakensis , E. judithae , E. tenuiflagellaris ); dorsal and ventral contour roughly subparallel, in apical third converging (converging from base to apex in E. dintelmanni ). Venter of rostrum poorly delimited against venter of head, basally with indistinct submental median carina and with pair of shallow lateral impressions. Submentum either subglabrous, or with numerous long, stiff, suberect setae. Mouthparts. Prementum at base 1.5–2.0 X wider than long, ca. 2.4–3.0 X wider than at apex; with straight or sinuate lateral margins converging apicad; anteriorly with 3 apical processes; these moderately long (long in E. tibialis ), usually subequal in length ( E. curvipes : median process much shorter than long lateral processes). Antenna relatively slender, sometimes funicle of ferruginous color as in Figs 56–72 . Proventriculus [based on examination of E. coelestinus , E. curvipes , E. oops , E. illegalovi , E. piceus , E. ratcliffei , E. ruficornis , E. tibialis , E. violaceus ] as in Figs 24–25 ; with 8 primary folds densely covered with hair­like setae; without sclerotized gnathal ridges, posteriad of primary fold without setose patch or pulvillus. Prothorax about as long as wide (0.91–1.03 X as long as wide; in E. tibialis and E. paratibialis 0.82–0.89 X as long as wide); with shallow subbasal constriction; sides subparallel, in anterior quarter converging; preapical constriction shallow or absent; sides usually densely punctate (in E. tibialis and E. paratibialis sparsely punctate with shallow punctures). Metanotum without sutural spines, but with pair of bluntly angular projections; with or without pair of lateral lobes. Elytron 2.07–2.85 X longer than wide; humerus simple ( E. tibialis and E. paratibialis : with minute denticle). Thoracic venter. Prepectus shorter than postpectus, coxae approaching anterior margin of prothorax. Height of pterothorax 0.73–0.89 X length of elytron (in E. curvipes 0.66–0.72 X length of elytron). Procoxae subconical, ventrally rounded, in anterior aspect with inner contours moderately diverging in straight or weakly convex lines, 1.13–1.44 X as long as wide, simple ( E. tibialis and E. paratibialis : inner contours markedly diverging in convex lines, 1.07–1.16 X as long as wide, externally with spine). Trochanter of foreleg ventrally rounded, not projecting beyond base of femur ( E. tibialis and E. paratibialis : Trochanter of foreleg ventrally pointed, projecting beyond base of femur). Legs. Ventral surface of femora simple, without teeth or knobs ( E. tibialis and E. paratibialis : profemur ventrally with very low, inconspicuous knob). Mesofemur and metafemur sparsely setose with thin, recumbent setae; profemur subglabrous, anteriorly at base with row of recumbent setae and at top of ventral convexity with inconspicuous cluster of suberect setae. Profemur subsymmetrically clavate, moderately swollen ( E. tibialis , E. paratibialis , E. curvipes : asymmetrically clavate, strongly swollen), usually thickest in apical third ( E. tibialis , E. paratibialis , E. curvipes : thickest in front of middle); basally dorsal edge with more or less distinct row of granules. Protibia in dorsal aspect straight; in anterior aspect either evenly curved ventrad, or in basal half straight and in apical half weakly curved ventrad; ventral contour parallel or subparallel to dorsal contour; ventral surface denticulate, moderately densely setose with suberect setae; uncus terminal; anterior distal comb ventrally shortened; posterior distal comb oblique, from behind tarsal articulation to ventral edge, in dorsal third shortened. Mesotibia dorsally before apex with subangulate lobe, its apical edge leading obliquely towards uncus; overall shape of mesotibia subtriangular ( E. tibialis , E. paratibialis , E. curvipes : subapical process on posterior face of mesotibia, inconspicuous). Dorsal edge of meso­ and metatibia distinctly crenulate. Protarsus somewhat elongate; tarsomere 1 of protarsus subequal to tarsomeres 2+3 together. Abdomen. Ventral contour straight or weakly concave in lateral view, with marked constriction between sternite VI and VII ( E. curvipes : without marked constriction between sternite VI and VII). Pygidium 0.87–1.16 X wider than long; densely and deeply punctate, or almost impunctate; sparsely setose with inconspicuous recumbent setae, at apex usually with denser suberect setae; not overlapped or weakly overlapped by elytral apex (character intraspecifically variable). Genitalia. Sternite VIII ( Figs 170–186 ) subtrapezoid, sides converging to subtruncate apex, base usually subtruncate or bisinuate; subapically with short to moderately long setae, especially towards sides. Tegminal plate ( Figs 119–135 ) narrow to wide, apex subtruncate or rounded, evenly setose with short to moderately long setae (in E. tibialis and E. paratibialis subapically on ventral surface with 2 patches of long, dense setae). Aedeagus. Apical scoop of pedon ( Figs 148–160, 162, 164, 166, 168 ) usually spoon­shaped, in some species apex subangulate or truncate. Tectum ( Figs 136–147 , 161, 163, 165, 167, 169 ) with well­sclerotized lateral frame, medially weakly sclerotized (in E. curvipes hyaline). Complex TA present at true gonopore; composed of several complexly articulated components housing ejaculatory duct; in E. tibialis and E. paratibialis these articulating structures missing, with flagellum instead. Endophallus with pair of elongate sclerites between body of aedeagus and TA.

Females. Same as males except: Length, pronotum + elytron: 2.28–3.95 mm. Head shorter; constriction of vertex behind eye less distinct or absent. Rostrum shorter, 1.54– 1.92 X as long as mouthparts. Prothorax slightly shorter than wide (0.86–0.98 X as long as wide; in E. tibialis and E. paratibialis 0.84–0.88 X as long as wide). Disk at middle with very shallow transverse impression (absent or almost absent in E. paratibialis , E. tibialis and E. ratcliffei , but quite distinct in E. coelestinus and E. oops ). Elytron 2.04– 2.72 X longer than wide. Thoracic venter. Height of pterothorax 0.78–0.89 X length of elytron (in E. curvipes 0.68–0.76 X length of elytron). Procoxae shorter, in anterior aspect 1.03–1.30 X as long as wide ( E. tibialis and E. paratibialis : 0.86–0.87 X as long as wide). Legs. Profemur ( Fig. 80 ) clavate, moderately swollen; dorsal contour sinuate, in basal third straight, continuing in markedly convex line to apex (in E. tibialis and E. paratibialis in evenly convex line to apex); ventral contour in straight line from base to 1/3 from apex, subangulate to weakly rounded, continuing apicad in straight line. Protibia straight, or weakly curved ventrad (in E. curvipes apical third markedly curved ventrad); dorsal contour evenly weakly convex; ventral surface crenulate or denticulate, setose (in E. curvipes crenulation weak and setae inconspicuous). Tibial apex with uncus and premucro (in E. piceus premucro missing); uncus in dorsal position; anterior distal comb ventrally shortened, not reaching ventral base of uncus. Mesotibia ( Fig. 79 ) subapically without subangulate lobe, its general shape same as metatibia. Protarsi somewhat shorter; tarsomere 1 of protarsus shorter or subequal to tarsomeres 2+3 together. Abdomen. Setose patch of venter subquadrate to elongate, 0.93–1.65 X as long as wide (in E. tibialis and E. paratibialis more transverse, 0.78–1.10 X as long as wide), consisting of 3 double rows of modified setae on sternites III–V with each sternite bearing 1 double row (in E. tibialis and E. paratibialis rows of each pair approximated and appearing as a single row); simple row of sparse, nonmodified setae on sternite VI inconspicuous. Ventral contour of abdomen weakly convex in lateral view, with shallow constriction between sternite VI and VII; at setose patch somewhat sinuate, convex at setose row, slightly concave between 2 double rows. Pygidium 1.00–1.28 X wider than long. Genitalia. Ovipositor without styli. Sternite VIII as in Figs 189 –203; much smaller than tergite VIII; apex more or less welldefined; base with short apodeme. Spermatheca as in Figs 204–219 , basally at junction with ductus extended siphon­like, thus insertion of gland shifted more or less apicad. In E. dintelmanni and E. curvipes this siphon­like extension short, in E. piceus absent.

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 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.

FIGURES 24–25. Proventriculus of Euops paratibialis (Cyclops Mts.).

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 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 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 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 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 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 76–80. Mesotibia of Euops (Metaeuops) spp.: (76) E. coelestinus, male (Wasior); (77) E. curvipes, paratype, male (Angguruk); (78) E. paratibialis, holotype; (79) E. coelestinus, female (Wasior); (80) Foreleg of female Euops coelestinus (Wasior). Scale lines 200 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.