Gonioctena (Asiphytodecta) flavoplagiata ( Jacoby, 1890 )

Cho, Hee-Wook & Borowiec, Lech, 2016, Revision of theGonioctena flavoplagiata species-group (Coleoptera: Chrysomelidae: Chrysomelinae), with descriptions of two new species from China and Laos, Acta Entomologica Musei Nationalis Pragae 56 (2), pp. 755-768 : 759-761

Gonioctena (Asiphytodecta) flavoplagiata ( Jacoby, 1890)

( Figs 2 , 7 , 11 , 19–21 , 29 )

Phytodecta flavoplagiata Jacoby, 1890: 117 (original description).

Phytodecta (Phytodecta) flavoplagiatus: WEISE (1916) : 181 (catalogue); WINKLER (1930): 1296 (catalogue).

Phytodecta flavoplagiatus: CHEN (1934) : 71, 76 (monograph), CHEN (1938): 290, 295 (monograph).

Phytodecta (Asiphytodecta) flavoplagiatus: CHEN (1935) : 130 (catalogue), CHEN (1936): 87 (catalogue).

Asiphytodecta flavoplagiatus: CHEN & YOUNG (1941) : 207 (key).

Gonioctena (Asiphytodecta) flavoplagiata: GRESSITT & KIMOTO (1963) : 359, 365 (taxonomy); KIMOTO & GRESSITT (1981): 385 (taxonomy); KIPPENBERG (2010): 432 (catalogue); CHO & BOROWIEC (2016): 174 (male genitalia).

Gonioctena (Asiphytodecta) flavoplagiata (partim): YANG et al. (2014): 384 (taxonomy); YANG et al. (2015): 54 (catalogue).

Type locality. China, Hubei Province, Changyang.

Type material examined. LECTOTYPE (here designated): ♂, ‘ Chang Yang, near Ichang, 4–6000 ft., VI // Phytodecta flavoplagiata Jac. // LECTOTYPUS Phytodecta flavoplagiata Jacoby, 1890 des. H.W. Cho 2014 // Gonioctena flavoplagiata ( Jacoby, 1890) det. H.W. Cho 2014’ ( MCZ). PARALECTOTYPES: 1 ♂, ‘ P. flavoplagiata Jac // Type 17506 // 1st Jacoby Coll.’ ( MCZ) ; 1 ♂, ‘ Chang Yang , China // 1st Jacoby Coll.’ ( MCZ) ; 1 ♀, ‘ Chang Yang , near Ichang, 6000 ft., VII.’ ( MCZ) .

Additional material examined. CHINA: HUBEI: Changyang , 1 ♀ ( MCZ, 2 nd Jacoby Coll.) ; Lichuan District , Leong-ho-kow, 4.ix.1948, 1 ♀, Gressitt & Djou leg. ( BPBM) ; Lichuan District, Suisapa , 1000 m, 22.vii.1948, 1 ♀ ( BPBM). The two latter specimens were identified and published by GRESSITT & KIMOTO (1963) .

Diagnosis. See diagnosis of G. (A.) eburoides .

Description. Measurements in mm (n = 4): length of body: 6.20–7.30 (mean 6.73); width of body: 4.20–5.10 (mean 4.65); height of body: 2.90–3.70 (mean 3.30); width of head: 1.80– 2.10 (mean 1.93); interocular distance: 1.25–1.45 (mean 1.33); width of apex of pronotum: 2.12–2.45 (mean 2.27); width of base of pronotum: 3.75–4.27 (mean 3.99); length of pronotum along midline: 1.70–1.90 (mean 1.78); length of elytra along suture: 4.50–5.50 (mean 4.98).

Body oval and strongly convex ( Fig. 2 ). Head reddish brown, with apex of mandibles black. Antennomeres I–V yellowish-brown, VI–VII partially darkened, VIII–XI black. Pronotum brown to blackish-brown, margins black. Scutellum dark brown, basal margin black. Elytra brown to blackish-brown, with two pairs of yellowish brown spots. Venter dark brown to black, with hypomera and last abdominal ventrite partially brown. Legs reddish-brown, with basal half or more of femora darkened.

Head. Vertex weakly convex, covered with sparse punctures, becoming coarser and denser toward sides. Frontal suture V-shaped, reaching anterior margin, coronal suture rather long. Frons flat, suddenly depressed at anterior margin, covered with dense punctures. Clypeus very narrow and trapezoidal.Anterior margin of labrum with tooth-like projection. Mandibles with two sharp apical teeth and deep excavation for apical maxillary palpomere on outer side. Maxillary palps 4-segmented, with apical palpomere slightly widened, truncate apically. Antennae reaching pronotal base; antennomere I robust, longest; II as long as III; III longer than IV; VIII–XI strongly widened and flattened, VIII–X each distinctly wider than long, XI about 1.1 times as long as wide ( Fig. 19 ).

Pronotum. Lateral sides rounded, widest at base, thence strongly narrowed anteriorly; anterior angles strongly produced ( Fig. 7 ). Anterior and lateral margins bordered, lateral margins well visible in dorsal view. Trichobothria absent on both anterior and posterior angles. Disc covered with sparse or moderately dense punctures; lateral sides covered with much larger and denser punctures; interspaces covered with fine and sparse punctures. Scutellum distinctly wider than long, narrowed posteriorly.

Elytra. Lateral sides slightly widened posteriorly, widest beyond middle, thence roundly narrowed posteriorly. Humeral calli well developed. Disc covered with irregular, coarse and large punctures except humeri, elytral suture and lateral margins; punctures partially arranged in double rows; interspaces covered with fine and sparse punctures. Epipleura visible in lateral view except near base. 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 sparse or dense punctures bearing short setae.

Legs. Moderately robust. Tibiae widened apically, with tooth-like projection. Fore legs with tarsomere I distinctly narrower than III in both sexes. Tarsal claws appendiculate.

Genitalia. Aedeagus rather thick, truncate before apex, setose apicolaterally, with apical process very thin in dorsal view; strongly curved, with apical process short in lateral view ( Fig. 20 ). Spermatheca C-shaped, thin and apex rounded ( Fig. 21 ).

Distribution. China: Hubei ( Fig. 29 ).

Remarks. A lectotype and paralectotype were designated by YANG et al. (2014). However, they designated a specimen from Tonkin as the lectotype, which does not belong to the type series of Phytodecta flavoplagiata , thus loses its status of lectotype ( ICZN 1999: Article 74.2), and refers to G. (A.) mausonensis . JACOBY (1890) gave ‘Chang Yang, China’ as the type locality and used four specimens for the description; however, there are five specimens in MCZC. Probably, some of them belong to the type series. A lectotype and paralectotypes are designated for G. (A.) flavoplagiata to avoid further misapplication. Several larvae were dissected from the female specimen, therefore this species is ovoviviparous ( Fig. 11 ).

Figures

Figs 1–5. Dorsal habitus: 1 – Go- nioctena (A.) eburoides (Achard, 1924); 2 – G. (A.) flavoplagiata (Jacoby, 1890), lectotype; 3 – G. (A.) jindrai sp. nov., holotype; 4 – G. (A.) mausonensis Cho & Borowiec, 2016, holotype; 5 – G. (A.) truncaticornis sp. nov., ho- lotype. Scale bars = 1.0 mm.

Figs 6–10. Head and pronotum: 6 – Gonioctena (A.) eburoides (Achard, 1924); 7 – G. (A.) flavoplagiata (Jacoby, 1890), lectotype; 8 – G. (A.) jindrai sp. nov., holotype; 9 – G. (A.) mausonensis Cho & Borowiec, 2016, holotype; 10 – G. (A.) truncaticornis sp. nov., holotype. Scale bars = 1.0 mm.

Figs 11–12. Larvae dissected from the female specimen: 11 – Gonioctena (A.) flavoplagiata (Jacoby, 1890); 12 – G. (A.) jindrai sp. nov.

Figs 13–21. 13–18 – Gonioctena (A.) eburoides (Achard, 1924): 13 – antenna; 14 – aedeagus (dorsal and lateral views); 15–17 – variation of apex of aedeagus (15–16 – Sa Pa; 17 – Tam Dao); 18 – spermatheca. 19–21 – G. (A.) flavoplagiata (Jacoby, 1890): 19 – antenna; 20 – aedeagus, paralectotype (dorsal view, detail of apex in dorsal view and lateral view); 21 – spermatheca. Scale bars = 1.0 mm (except Figs 18, 21 = 0.5 mm).

Fig. 29. Distribution of Gonioctena (A.) flavoplagiata species-group.