Euops piceus, 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 : 51-53

Euops piceus sp. n.

( Figs 17 , 40 , 54 , 66 , 91–92 , 133 , 168, 169 , 184 , 201 , 217 , 223 )

Diagnosis

Coloration uniformly piceous except scutellum, anterior surface of procoxa and a narrow band at base of pygidium golden. Pygidium microreticulate throughout, densely punctate. Male: TA as in Figs 91–92 ; transfer processes long and curved, subflagelliform, loosely attached to simplified frame of TA. Female: Tibial apex with uncus only, without premucro. Spermatheca without siphon­like extension ( Fig. 217 ).

Range ( Fig. 223 )

Manokwari Prov. (Wandammen Bay), Jayawijaya Prov. (Holuwon, Samboka), Western Prov. (Kiunga). Elevation: 14– 700 m.

Material examined

Holotype: WEST NEW GUINEA, Manokwari Prov. , 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 ( MZB) . Paratypes: WEST NEW GUINEA, Manokwari Prov. : 3 males, 2 females (1 marked as “ allotype ”), same data as holotype ( ARC, MZB) . Jayawijaya Prov. : 1 male, Yeimu, near Holuwon [at least 700 m], 28.VI.1994, leg. A.Riedel ( ARC) ; 1 male, 1 female, Samboka , Upper Kolff River, ca. 200 m, 10–14.X.1996, leg. A.Riedel ( ARC) . PAPUA NEW GUINEA, Western Prov. : 1 male, Kiunga, Fly Riv., [14 m], 8– 10.VIII.1957, leg. W.W.Brandt ( BPBM) .

Description

Holotype, male. Length, pronotum + elytron: 2.58 mm. Coloration ( Fig. 17 ) uniformly piceous except scutellum, anterior surface of procoxa and a narrow band at base of pygidium golden; antennal funicle ferruginous, antennal club black. Head. As in Fig. 40 . Gena 0.80 X as long as width of head immediately behind eyes. Contours of genae in dorsal view weakly converging anteriad. Vertex dorsally subglabrous; laterally behind eye sparsely punctate. Eyes in dorsal view weakly prominent from lateral contour of head. Profile of vertex with marked constriction immediately behind eye. Ventral surface of head in front of gular region moderately sculptured; with median furrow behind base of rostrum pit­like impressed, posteriorly shallow; with row of deep punctures bordering margin of eye, posteriorly with shallow transverse wrinkles. Rostrum 1.96 X as long as mouthparts; at widest point 1.38 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 subangulate with head (ca. 120°), weakly sinuate to apex; ventrally on submentum with numerous long, stiff, suberect setae. Mouthparts. Prementum at base 2.0 X wider than long, ca. 2.6 X wider than at apex; with straight lateral margins converging apicad; apical processes rounded, of equal length, on same level dorsoventrally. Antenna slender, as in Fig. 66 . Prothorax 0.98 X as long as wide; preapical constriction shallow; disc basally in front of subbasal constriction with pair of indistinct, submedian swellings; shining, impunctate; sides with dense, moderately deep punctures. Metanotum laterally roof­like extended and subangularly projecting, but without distinct lateral lobes. Elytron 2.25 X longer than wide; striae basally deeply impressed, towards apex becoming shallower. Thoracic venter. Height of pterothorax 0.81 X length of elytron. Procoxa in anterior aspect 1.17 X as long as wide. Legs. Profemur subsymmetrically clavate, moderately swollen, thickest at 0.33 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, evenly rounded to constriction between sternite VI and VII. Ventral surface of sternite III subglabrous, sternites IV–VI laterally with sparse subrecumbent setae, medially subglabrous; sternite VI without median knob or swelling in front of posterior margin. Pygidium 0.97 X wider than long; microreticulate throughout; densely, moderately deeply punctate; densely, deeply punctate. Genitalia. Apex of tergite VIII curved in evenly convex line. Sternite VIII as in Fig. 184 . Tegminal plate ( Fig. 133 ) with sides weakly converging apicad; apical edge subtruncate, densely setose with moderately long setae. Aedeagus. Apical scoop of pedon ( Fig. 168 ) ca. 1.38 X as long as wide, with lateral margins weakly convex, converging; apex subangulate. Tectum as in Fig. 169 ; lateral frame converging with sinuate sides to pointed apex; subapically without extensions. TA as in Fig. 91–92 ; transfer processes long, in lateral aspect markedly curved,

in dorsal aspect straight, their shape resembling a short flagellum, but in apical portion both processes clearly divided; this complex only loosely attached to structurally simplified frame of TA; the latter forming a relatively large sclerite of the shape of an inverted U; without distinct dorsal plate; internal support structures of ductus ejaculatorius moderately long. Endophallus somewhat twisted anti­clockwise from plane of aedeagus. Cuticle of endophallus in apical 0.38 (of total length of aedeagus) with dense, subtriangular denticles; in mid portion with pair of elongate sclerites; without any setae between these sclerites ( Fig. 93 ).

Allotype, female. Same as holotype except: length, pronotum + elytron: 2.56 mm. Head as in Fig. 54 . Gena 0.74 X as long as width of head immediately behind eyes. Profile of vertex with shallow constriction immediately behind eye. Rostrum 1.76 X as long as mouthparts; at widest point 1.50 X wider than at base. Prothorax 0.94 X as long as wide. Disk at middle with very shallow transverse impression. Elytron 2.21 X longer than wide. Thoracic venter. Height of pterothorax 0.85 X length of elytron. Procoxa in anterior aspect 1.09 X as long as wide. Legs. Dorsal contour of profemur sinuate, in basal third straight, continuing in markedly convex line to apex. Protibia straight [right tibia broken and missing]; ventral contour basally straight, at middle convex, apically concave; ventral surface crenulate, with subrecumbent to suberect setae; tibial apex with uncus only, without premucro. Abdomen. Setose patch of venter 1.63 X as long as wide, consisting of 3 double rows of modified setae. Pygidium 1.14 X wider than long. Genitalia. Sternite VIII as in Fig. 201 . Tergite VIII with sides apicad converging; apex rounded. Spermatheca as in Fig. 217 ; without siphon­like extension at junction with ductus; shape robust; somewhat tapering towards apex. Length of ductus spermathecae plus spermatheca 1.7 X as long as tergite VIII.

Intraspecific variation

Length, pronotum + elytron: 2.34–2.91 mm (n=10, =2.59 ± 0.17). Prothorax 0.95– 0.99 X as long as wide in males (n=7, =0.97 ± 0.02), 0.94–0.97 X as long as wide in females (n=3, =0.95 ± 0.02). Elytron 2.16–2.26 X longer than wide in males (n=7, =2.23 ± 0.03), 2.20–2.24 X longer than wide in females (n=3, =2.21 ± 0.02). Thoracic venter. Height of pterothorax 0.81–0.84 X length of elytron in males (n=7, =0.82 ± 0.01), 0.85–0.87 X length of elytron in females (n=3, =0.86 ± 0.01). Abdomen. Pygidium 0.93–1.10 X wider than long in males (n=7, =1.00 ± 0.06), 1.09–1.14 X wider than long in females (n=3, =1.11 ± 0.03). Female patch of modified setae 1.19–1.63 X as long as wide (n=3, =1.49 ± 0.26). Genitalia. Aedeagus slightly variable in length; in some specimens 0.8 the length of others.

Etymological note

This epithet is based on the Latin adjective piceus (pitch­black). It refers to the predominantly dark coloration of the species.

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 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 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 91–93. Male genitalia of Euops (Metaeuops) spp.; transfer apparatus of aedeagus in dorsal aspect (left) and lateral aspect (right); (91) E. dintelmanni, holotype; (92) E. piceus, holotype; scale lines 100 µm; (93) aedeagus of Euops piceus, holotype, in dorsal aspect. Scale line 200 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 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.