Euops bicolor, Riedel, 2001

Riedel, Alexander, 2001, The pygmaeus-group of Euops Schoenherr (Coleoptera, Curculionoidea, Attelabidae), weevils associated with Nothofagus in New Guinea, Journal of Natural History 35 (8), pp. 1173-1237 : 1223-1225

Euops bicolor sp. n.

(®gures 10, 42, 88, 89, 104, 120, 125, 139, 150, 169, 183, 195, 207, 218, 223)

Diagnosis. Colouration of disc of elytron and greater part of legs testaceous; colouration of head and pronotum deep greenish-bronze. Pronotum microporose, with punctures weakly transversely conūent, becoming denser and deeper from base to apex. Female: Abdominal sternite VI with simple row of sparse, nonmodi®ed setae. Male: Uncus of metatibia with accessory tooth. TA small, as in ®gure 150, endophallus with numerous conspicuous spicules.

Range. Figure 223. Paniai Prov. (Sinak). Altitude: c. 2000±2200 m.

Type material. HOLOTYPE: Irian Jaya : Paniai Prov., Sinak, 2000±2200 m, 14± 17 December 1995, leg. A. Riedel ( ARC) . PARATYPES: ten males, ten females (one marked as`allotype’), same data as holotype ( ARC) .

Description

Holotype, male. Length, pronotum 1 elytron: 2.11 mm. Colouration. Disc of elytron, coxae, basal parts of femora, tibiae testaceous; declivity and sutural interval of elytron, antenna, tarsi dark brown; head, thorax, abdomen, apical two thirds of profemur greenish-bronze; apical two thirds of mesofemur and metafemur testaceous with distinct greenish-bronze shine. Head. As in ®gure 88; short, with gena 0.88 Ö as long as width of head behind eyes; contours of genae in dorsal view subparallel, weakly converging anteriad; vertex dull (microporose at high magni®cation), sparsely shallowly punctate, along hind margin of eye with row of moderately deep punctures, further behind with two furrows parallel to posterior margin of each eye curving dorsad from very indistinctly striolate area posterolaterally; eyes evenly rounded, dorsally distant, separated by c. 0.29 Ö basal width of rostrum; frons smooth except row of punctures along mesal margin of eye, anteriorly with median longitudinal impression, centre without median costa; ventrally in front of gular region shining, deeply punctate, without median furrow, with long median submental carina extended to shortly before posterior tentorial pit. Rostrum 1.63 Ö as long as mouthparts, at widest point 1.54 Ö wider than at base; clypeus with median process apically deeply incised; antennal insertion at base, approximately within basal ®fth of rostrum; in lateral aspect with dorsal contour weakly bisinuate, above antennal insertion and at middle of rostral length weakly convex; ventral contour at base continuous with contour of head, weakly concave to apex; dorsal and ventral contour converging from base to apex; ventral surface with submentum before hind level of maxillary cavities slightly convex, posteriorly towards sides rising to postgenal recesses, margins of ¯at median area converging basad, continued by median submental carina. Antenna as in ®gure 104. Prothorax. Sides subparallel, straight, weakly converging from base to apex; with indistinct preapical constriction; disc dull (microporose at high magni®cation), punctate, punctures weakly transversely conūent, becoming denser and deeper from base to apex, basally with shallow punctures, apically with deep punctures. Elytron. At humerus simple; 2.68 Ö longer than wide; striae moderately deeply impressed. Thoracic venter. Prepectus approximately as long as postpectus. Height of pterothorax 0.67 Ö length of elytron. Legs. Procoxa anteriorly simple. Profemur with ventral surface smooth. Protibia (®gure 120) with dorsal contour weakly curved, ventral contour subparallel, weakly sinuate; ventral surface anteriorly weakly granulate, posteriorly with sparse denticles, densely setose. Mesotibia with dorsal edge subapically simple, without extension. Uncus of metatibia

.) _ ( pygmaeus . E;) + ( platyrostris . E and ibelensis . E;) E ( porulosus . E of Distribution

. 225. IG F curved ventrad, at base with posteriad directed accessory tooth. Abdomen. Ventral contour in lateral view weakly concave; venter sparsely setose; sternite VII with apex evenly concave; pygidium c. 1.29 Ö wider than long, dull, shallowly punctate, setose, base laterally overlapped by elytral apex. Genitalia. Sternite VIII (®gure 169) with apex concave, apically sparsely setose with short setae, subapically with pair of less sclerotized areas. Tegminal plate (®gure 195) with sides subparallel before apex, weakly diverging; apex subtruncate, weakly rounded, evenly setose. Aedeagus as in ®gure 139. Apical scoop of pedon (®gure 183) with lateral margins weakly concave and converging, with apex acute. TA as in ®gure 150.

Allotype, female. Same as holotype except: Length, pronotum1 elytron: 2.28 mm. Head. As in ®gure 89; eyes separated by c. 0.35 Ö basal width of rostrum. Rostrum. Apically more strongly compressed dorsoventrally; in lateral view with dorsal contour sinuate, in front of antennal insertion concave to apex. Elytron 2.66 Ö longer than wide. Thoracic venter. Prepectus c. 0.5 Ö as long as postpectus. Height of pterothorax 0.71 Ö length of elytron. Legs. Protibia (®gure 125) in anterior view with dorsal contour straight except before apex and base, ventral contour strongly sinuate, convex at base, concave at apex; apex of pro-, meso- and metatibia with uncus and small premucro; uncus of metatibia without accessory tooth. Abdomen. Patch of modi®ed setae c. 0.62 Ö as long as wide; sternite VI with simple row of nonmodi®ed setae. Genitalia. Sternite VIII as in ®gure 218. Spermatheca (®gure 207) slender; with membranous spermathecal gland.

Intraspeci W c variation. Length, pronotum1 elytron: 2.06±2.53 mm (n 5 20, xÅ 5 2.27 Ô 0.14). Colouration. Femora mostly testaceous and only profemur with slight greenish shine, or apical parts of all femora dark bronze. Depth of sculpture of head and protorax slightly variable, more or less deeply impressed. Elytron. 2.60± 2.74 Ö longer than wide (n 5 18, xÅ 5 2.66 Ô 0.05). Thoracic venter. Height of pterothora x in males 0.67± 0.70 Ö length of elytron (n 5 10, xÅ 5 0.69 Ô 0.01), in females 0.69± 0.72 Ö length of elytron (n 5 9, xÅ 5 0.71 Ô 0.01). Legs. Males of larger body size with tibiae stouter, femora more swollen. Abdomen. Female patch of modi®ed setae c.0.62± 0.80 Ö as long as wide (n 5 9, xÅ 5 0.69 Ô 0.05).

Etymological note

This epithet is based on the Latin adjective bicolor (two-coloured) which refers to the greenish-bronze colouration of its head and prothorax contrasting to the testaceous elytral colour.

Biological note

This species was collected along with E. nothofagi and E. porulosus on the extensive leaf ¯ush of a Nothofagus perryi seedling.