Gonioctena (Gonioctena) norvegica (Strand, 1936)

Cho, Hee-Wook, Kippenberg, Horst & Borowiec, Lech, 2016, Revision of the Gonioctenanivosa species-group (Coleoptera, Chrysomelidae, Chrysomelinae) in the Holarctic region, with descriptions of two new species, ZooKeys 596, pp. 87-128 : 110-113

Taxon classification Animalia Coleoptera Chrysomelidae

Gonioctena (Gonioctena) norvegica (Strand, 1936) Figs 9-10, 55-61, 62

Phytodecta norvegicus Strand, 1936: 104 (type locality: Målselv, Rundhaugen, Nordmo); Palmén 1946: 230.

Gonioctena norvegicus : L. N. Medvedev and Korotyaev 1980: 81 (as synonym of Gonioctena affinis ).

Gonioctena norvegica : Silfverberg 1992: 69, 1994b: 32, 2004: 82.

Gonioctena (Gonioctena) norvegica : Bieńkowski 2004: 67; Kippenberg 2010: 434.

Phytodecta charitonowi Palmén, 1946: 231 (type locality: Siberia); Kippenberg 2010: 434 (as synonym of Gonioctena norvegica ).

Gonioctena janovskii L. N. Medvedev, 1976: 234 (type locality: Mongolia, Central Aimak, Tereldzhin gol forestry); L. N. Medvedev and Voronova 1976: 229; Zaytsev and L. N. Medvedev 1977: 368 (larva); L. N. Medvedev and Zaytsev 1980: 106 (larva); L. N. Medvedev and Roginskaya 1988: 101 (host plant); Dubeshko and L. N. Medvedev 1989: 133 (biology). syn. n.

Gonioctena (Gonioctena) janovskii : L. N. Medvedev and Zaytsev 1978: 119 (larva); L. N. Medvedev 1982: 91, 179, 252 (incl. larva); Lopatin et al. 2004: 122; Kippenberg 2010: 433; Warchałowski 2010: 558.

Type material.

Phytodecta norvegicus : Syntypes 2♂♂, 2♀♀ (NMPC), Rundhaug M. elv, A. Strand; 1♂ (NHRS), Rundhaug M. elv, A. Strand // Paratypus // Phytodecta norvegicus A. Strand // NHRS-JLKB 000023154.

Phytodecta charitonowi : Holotype probably in MZHF.

Gonioctena janovskii : Holotype ♂ (LMC), Holotypus // 29.VI.1971, Mongolian People’s Republic, Central Aimak, Tereldzhin gol forestry, on Salix leaves, V. Yanovsky leg. Paratypes: 1♂ (LMC), same data as holotype; 1♂, 1♀ (LMC), same data as holotype except 23.VI.1971.

Other material.

Finland: 2♂♂, 2♀♀ (ZMUC), Fennia, Ob Rovaniemi, Piaa, 21.6.1915, Hakan Lindberg; 2♂♂ (SDEI), Lapponia, Leonhard leg. Sweden: 1♂ (ZMUC), Nb. Storsien, 22.6.1981, G. Gillerfors // norvegicus // Ex coll. Viggo Mahler. Russia: 1♂, 1♀ (ABC), Altai Mts., environs of Bayas lake, 51°17'N, 87°56'E, 1700 m, 14.VIII.1993, M. Savitsky leg.; 1♂ (ABC), Komi Republic, Intinsky Distr., Paga-ty lake, 25.VI.2007, A.A. Kolesnikova leg.; 1♂ (AWC), RUSSIA, SE Tuva, Khorummnug-Taiga Mts., Ailyg-Kai River Valley, subalpine, on Salix , 15.VI.1999, Yu. Mikhailov leg. // Gonioctena janovskii L. Medvedev, M. Bergeal det. 2000; 1♂ (ZIN), Russia, Sverdlovsk Oblast or Tyumen Oblast, Manya River basin, forest Urals, 16-19.VI.1927, Lyapin and Flerov leg.; 1♂ (TLMF), Russia, E-Sayan, Sibir, 54 km w Mondy 1900m, 13.VII.2012, leg. S. Floßmann. Mongolia: 3♂♂, 2♀♀ (NMPC), Mong. bor. BOGDO-UL, 11.VIII.66, Dlabola, in litt. loc. 39.

Diagnosis.

Gonioctena norvegica differs in having antennae much shorter than half length of body in male, not reaching elytral humeri in female, aedeagus rather thick in dorsal view and strongly curved in lateral view.

Redescription.

Measurements in mm (n = 5): length of body: 4.30-5.50 (mean 4.98); width of body: 2.35-3.40 (mean 3.00); height of body: 1.60-2.30 (mean 1.98); width of head: 1.30-1.50 (mean 1.42); interocular distance: 0.95-1.10 (mean 1.03); width of apex of pronotum: 1.47-1.72 (mean 1.62); width of base of pronotum: 2.07-2.78 (mean 2.46); maximum width of pronotum: 2.10-2.80 (mean 2.48); length of pronotum along midline: 1.15-1.35 (mean 1.24); length of elytra along suture: 2.95-4.20 (mean 3.65).

Body oblong oval and moderately convex (Fig. 9). Head black. Mandibles black, with dark reddish brown band near apex. Maxillary palps blackish brown, with apical palpomere black. Antennae yellowish brown or reddish brown, generally with last 4-6 antennomeres darkened. Pronotum reddish brown, with small or large black markings (Fig. 61). Scutellum black. Elytra reddish brown, with 4-5 pairs of black spots. Venter black, with hypomera and apical margin of last abdominal ventrite reddish brown. Legs black, with tibiae reddish brown except base and inner margin and tarsi dark brown or reddish brown.

Head. Vertex weakly convex, covered with moderately dense punctures. Frontal suture V-shaped, coronal suture weak or absent. Frons flat, strongly depressed at anterior margin, covered with dense punctures. Clypeus narrow and trapezoidal. Anterior margin of labrum distinctly concave. Mandibles with 2 sharp apical teeth and a deep excavation for apical maxillary palpomere at outer side. Maxillary palps 4-segmented, with apical palpomere distinctly widened, truncate apically in male; slightly widened in female. Antennae in male reaching elytral humeri; antennomere 1 robust; antennomere 2 shorter than 3; antennomere 3 longer than 4; antennomeres 7-11 each distinctly longer than wide; antennomere 11 longest, about 2.26 times as long as wide (Fig. 55). Antennae in female reaching pronotal base; antennomere 11 about 2.05 times as long as wide.

Pronotum. Lateral sides widest at or near base, roundly moderately narrowed anteriorly, anterior angles strongly produced (Fig. 10). Anterior and lateral margins bordered, lateral margins invisible in dorsal view. Trichobothria present on posterior angles. Disc covered with moderately dense punctures; lateral sides covered with much coarser punctures, becoming larger toward base, partially confluent near basal margin; interspaces covered with fine and sparse punctures. Scutellum slightly wider than long, narrowed posteriorly.

Elytra. Lateral sides moderately widened posteriorly, widest beyond middle, thence roundly narrowed posteriorly. Humeral calli well developed. Disc covered with 11 regular rows of large punctures, including a short scutellar row; sometimes punctures rather irregular between 6th and 8th striae in apical half; interspaces shagreened, covered with fine and sparse punctures. Epipleura wholly visible in lateral view. Hind wings well developed.

Venter. Hypomera weakly rugose, with a few punctures near anterolateral corners of prosternum. Prosternum covered with coarse and dense punctures bearing long setae; prosternal process enlarged apically, bordered laterally, with sparse punctures. Metasternum covered with small and sparse punctures in median region, large and dense punctures in lateral region. Abdominal ventrites covered with dense punctures bearing short setae.

Legs. Moderately robust. Tibiae widened apically, with a tooth-like projection. Fore legs with tarsomere 1 strongly enlarged, distinctly wider than 3 in male; very slightly narrower than 3 in female. Tarsal claws appendiculate.

Genitalia. Aedeagus rather thick, with short apical process in dorsal view; strongly curved, with apical process pointed and slightly bent downward at apex in lateral view (Figs 56-60). Spermatheca absent.

Distribution.

Finland, Norway, Sweden, Russia (North European Territory, West Siberia), Mongolia (Fig. 62).

Host plant.

Salicaceae : Salix spp. (L. N. Medvedev and Voronova 1976, L. N. Medvedev and Zaytsev 1978, L. N. Medvedev and Roginskaya 1988).

Remarks.

The shape of aedeagus slightly varies geographically (Fig. 62). After examining the type and other specimens from the Palaearctic region, we conclude that Gonioctena janovskii from Mongolia should be synonymized with Gonioctena norvegica . Medvedev and Korotyaev (1980) synonymized Gonioctena norvegica with Gonioctena affinis (= Gonioctena nivosa ), however Gonioctena norvegica differs in having shorter antennae and thicker aedeagus compared with those of Gonioctena nivosa , as previously mentioned by Silfverberg (1994b). Kippenberg (2010) treated Gonioctena charitonowi as a synonym of Gonioctena norvegica , however the illustration of the aedeagus of Gonioctena charitonowi looks quite different from that of Gonioctena norvegica . It should be re-examined to confirm its taxonomic status.