Euops arfakensis, 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 : 38-39

Euops arfakensis sp. n.

( Figs 15 , 27 , 58 , 106 , 127 , 147 , 148 , 178 , 222 )

Diagnosis

Male: Coloration black with slight bronzy to bluish lustre. TA as in Fig. 106 ; transfer processes apically markedly projecting beyond frame´s apex; internal support structures of ductus ejaculatorius not reaching level of basal sclerites.

Range ( Fig. 222 ) Manokwari Prov. (Arfak Mts.). Elevation: 700–800 m.

Material examined

Holotype: WEST NEW GUINEA, Manokwari Prov. , Ransiki, Membey, 800–1200 m, 31.VIII.1991, leg. A.Riedel ( MZB) . Paratypes: WEST NEW GUINEA, Manokwari Prov. : 1 male, Manokwari, Warmare, 200–700 m, 22.VIII.1991, leg. A.Riedel ( ARC) .

Description

Holotype, male. Length, pronotum + elytron: 2.44 mm. Coloration ( Fig. 15 ) black with slight bronzy lustre; head, sides of pronotum, scutellum, fore­coxae and metafemur with bluish lustre; metasternum and abdominal venter with greenish lustre; antenna black. Head. As in Fig. 27 . Gena 0.78 X as long as width of head immediately behind eyes. Contours of genae in dorsal view moderately converging anteriad. Vertex subglabrous, without punctures. Eyes in dorsal view weakly prominent from lateral contour of head. Profile of vertex with shallow impression immediately behind eye. Ventral surface of head in front of gular region weakly sculptured; with median furrow behind base of rostrum pitlike impressed, posteriorly shallow; with sparse minute punctures, posteriorly with shallow transverse wrinkles. Rostrum 1.77 X as long as mouthparts; at widest point 1.53 X wider than at base; in profile dorsal contour above antennal insertion with very subtle rounded prominence, anteriorly in weakly sinuate line to apex; ventral contour subangulate with head (ca. 135°), in almost straight line to apex; ventrally on submentum with numerous long, stiff, suberect setae. Mouthparts. Prementum at base 1.5 X wider than long, ca. 2.5 X wider than at apex; with weakly sinuate lateral margins converging apicad, at base of lateral apical process with shallow constriction; apical processes angulate, of equal length, on same level dorsoventrally. Antenna slender, as in Fig. 58 . Prothorax 0.95 X as long as wide; preapical constriction very shallow, almost absent; disc evenly convex, shining, impunctate; sides with sparse, moderately deep punctures. Metanotum laterally roof­like extended and subangularly projecting, but without distinct lateral lobes. Elytron 2.43 X longer than wide; striae moderately impressed. Thoracic venter. Height of pterothorax 0.75 X length of elytron. Procoxa in anterior aspect 1.23 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 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, 2.8 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. Venter subglabrous, with sparse suberect setae; sternite VI with swelling in front of posterior margin. Pygidium as long as wide (1.00 X); at extreme base microreticulate, remainder shining; sparsely punctate with shallow punctures. Genitalia. Apex of tergite VIII curved in evenly convex line. Sternite VIII as in Fig. 178 . Tegminal plate ( Fig. 127 ) with sides moderately converging apicad; apical edge subtruncate, densely setose with short setae. Aedeagus. Apical scoop of pedon ( Fig. 148 ) ca. 1.18 X as long as wide, evenly rounded to apex, spoon­shaped. Tectum as in Fig. 147 ; lateral frame weakly converging to narrow apex; subapically without extensions. TA as in Fig. 106 ; transfer processes basally articulated inside of frame of TA, apically markedly projecting beyond frame´s apex; base of transfer processes at about middle of frame; with dorsal plate of about the same width as frame; internal support structures of ductus ejaculatorius short, not reaching level of basal sclerites; basal sclerites ca. 0.20 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 elongate sclerites; between these sclerites without setae.

Intraspecific variation

Coloration of teneral specimen (from Warmare) rather ferruginous with bluish lustre. Length, pronotum + elytron: 2.44–2.97 mm. Prothorax 0.95–0.97 X as long as wide. Elytron 2.29–2.43 X longer than wide. Thoracic venter. Height of pterothorax 0.75–0.80 X length of elytron. Abdomen. Pygidium 0.95–1.00 X wider than long.

Etymological note This epithet is based on the type locality, the Arfak mountains of West New Guinea .

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 106–109. Male genitalia of Euops (Metaeuops) spp.; transfer apparatus of aedeagus in dorsal aspect (left) and lateral aspect (right); (106) E. arfakensis, holotype; (107) E. ratcliffei, holotype; (108) E. judithae, holotype; (109) E. tenuiflagellaris, holotype. Scale lines 100 µm. b.s. = basal scerite, f = frame of TA, tr.pr. = transfer processes.

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 220–222. Distribution of Euops (Metaeuops) spp. Areas above 1000 m are shaded.