Euops nothofagi, 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 : 1217-1222

Euops nothofagi sp. n.

(®gures 9, 14, 18, 32, 43, 46, 48, 50, 51, 53, 55, 60, 68, 86, 87, 103, 119, 138, 149, 168, 182, 194, 208, 219, 223)

Diagnosis. Colouration reddish-brown except dorsal part of head and prothorax and sides of abdomen with greenish shine not completely covering the underlying testaceous colour. Pronotum microporose, with dense deep punctures. Female: Abdominal sternite VI with simple row of sparse, nonmodi®ed setae. Male: Uncus of metatibia without accessory tooth. TA as in ®gure 149.

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: eight males, four females (one marked as`allotype’), same data as holotype ( ARC) .

Description

Holotype, male. Length, pronotum1 elytron: 2.14 mm. Colouration. Reddishbrown except dorsal part of head and prothorax and sides of abdomen with greenish shine not completely concealing the underlying testaceous colour; antenna, tarsal article 3 and sutural interval of elytron dark brown to black. Head. As in ®gure 86; short, with gena 0.80 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); vertex with moderately deep, dorsally transversely conūent punctures; eyes evenly rounded, dorsally distant, separated by c. 0.32 Ö basal width of rostrum; frons as in ®gures 21±22, smooth except row of punctures along mesal margin of eye, anteriorly with median longitudinal impression, centre with smooth median costa extending posteriad; ventrally in front of gular region dull, except medially shallowly punctate, without median furrow, with long median submental carina extended to shortly before posterior tentorial pit (®gure 18). Rostrum 1.58 Ö as long as mouthparts, at widest point 1.41 Ö wider than at base; clypeus with median process apically deeply incised; antennal insertion at base, c.within basal ®fth of rostrum; in lateral aspect with dorsal contour sinuate, convex above antennal insertion, concave to apex; 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 ¯at, posteriorly towards sides steeply rising to postgenal recesses, margins of ¯at median area converging basad, continued by median submental carina. Antenna as in ®gure 103. Prothorax. Sides subparallel, straight, rounded towards apex; without preapical constriction; disc dull (microporose at high magni®cation), with dense deep punctures. Elytron. At humerus simple; 2.69 Ö longer than wide; striae moderately deeply impressed. Thoracic venter. Prepectus c. 0.5 Ö as long as postpectus. Height of pterothorax 0.62 Ö length of elytron. Legs. Procoxa anteriorly simple. Profemur with ventral surface smooth. Protibia (®gure 119) 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 curved ventrad, at base without accessory tooth (®gure 55). Abdomen. Ventral contour in lateral view weakly concave; venter sparsely setose; sternite VII with apex evenly concave; pygidium c. 1.50 Ö wider than long, dull, shallowly punctate, setose, base laterally overlapped by elytral apex. Genitalia. Sternite VIII (®gure 168) with apex bilobed, apically sparsely setose with short setae, subapically with pair of less sclerotized areas. Tegminal plate (®gure 194) with sides subparallel before apex, weakly converging; apex subtruncate, evenly setose. Aedeagus as in ®gure 138. Apical scoop of pedon (®gure 182) with lateral margins sinuate and converging, with apex subacute. TA as in ®gure 68, 149.

Allotype, female. Same as holotype except: Length, pronotum1 elytron: 2.36 mm. Head. As in ®gure 87; eyes separated by c. 0.37 Ö basal width of rostrum. Rostrum. Apically more strongly compressed dorsoventrally. Elytron 2.63 Ö longer than wide. Thoracic venter. Height of pterothorax 0.68 Ö length of elytron. Legs. Protibia 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 premucro. Abdomen. Patch of modi®ed setae c. 0.67 Ö as long as wide; sternite VI with simple row of nonmodi®ed setae (®gure 60). Genitalia. Sternite VIII as in ®gure 219. Spermatheca (®gure 208) slender; with membranous spermathecal gland.

Intraspeci W c variation. Length, pronotum1 elytron: 1.94±2.36 mm (n 5 12, xÅ 5 2.17 Ô 0.14). Colouration from reddish-brown to lighter yellowish; greenish shine of head and prothorax more or less extensive, but at least laterally underlying colouration visible. Elytron. 2.61± 2.72 Ö longer than wide (n 5 11, xÅ 5 2.65 Ô 0.04). Thoracic venter. Height of pterothorax in males 0.62± 0.66 Ö length of elytron (n 5 6, xÅ 5 0.63 Ô 0.02), in females 0.63± 0.70 Ö length of elytron (n 5 4, xÅ 5 0.66 Ô 0.03). Abdomen. Female patch of modi®ed setae c.0.60± 0.79 Ö as long as wide (n 5 3, xÅ 5 0.69 Ô 0.10).

Etymological note

This epithet is based on the generic name of the species’ host, Nothofagus (Southern beech).

Biological note

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

.

E

and

convexus

.

E

,

anggiensis

.

E

;

)

_

(

Sinak

at.

) nothofagi ¨ Anggi (

.

E of and vicinity

bicolor the

.

E in

;

)

+

(

parvus

.

E

;

)

E

(

singularis

.

E

of

Distribution

.

223

.

IG

F

.) + ( kurulu . E;)? records doubtful, E ( sedlaceki . E of Distribution

. 224. IG F