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 : 756-757

Gonioctena (Asiphytodecta) flavoplagiata species-group

Diagnosis. Body length 6.2–7.6 mm. Dorsum brown to blackish brown with two pairs of yellowish brown spots on elytra. Anterior margin of labrum with tooth-like projection.Antennae reaching pronotal base, with last four antennomeres strongly widened and flattened. Elytral surface mostly covered with irregular, coarse and large punctures except humeri, elytral suture and lateral margins. Aedeagus variable in shape, very thin or thick with narrow or broad apical process, setose apicolaterally. Spermatheca C-shaped and very thin.

Key to the species of the Gonioctena flavoplagiata species-group

1 Venter largely black to dark brown. ............................................................................... 2

– Venter largely reddish-brown. .................. G. (A.) mausonensis Cho & Borowiec, 2016

2 Apical antennomere widely rounded at apex ( Figs 13, 19 , 25 ). ..................................... 3

– Apical antennomere rather truncate at apex ( Fig. 27 ). ... G. (A.) truncaticornis sp. nov.

3 Aedeagus strongly narrowed before short apical process ( Figs 20 , 23 ). ........................ 4

– Aedeagus moderately narrowed from apical 1/3 to apex ( Figs 14–17 ). ........................... ..................................................................................... G. (A.) eburoides ( Achard, 1924)

4 Apical process of aedeagus thin and elongate-oval ( Fig. 23 ). .... G. (A.) jindrai sp. nov.

– Apical process of aedeagus very thin and parallel-sided ( Fig. 20 ). .................................. ................................................................................ G. (A.) flavoplagiata ( Jacoby, 1890)

Figures

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).

Figs 22–28. 22–24 – Gonioctena (A.) jindrai sp. nov.: 22 – antenna; 23 – aedeagus, holotype (dorsal view, detail of apex in dorsal view and lateral view); 24 – spermatheca. 25–26 – G. (A.) mausonensis Cho & Borowiec, 2016 (after CHO & BOROWIEC 2016): 25 – antenna; 26 – aedeagus, holotype (dorsal view, detail of apex in dorsal view and lateral view). 27–28 – G. (A.) truncaticornis sp. nov.: 27 – antenna; 28 – aedeagus, holotype (dorsal and lateral views). Scale bars = 1.0 mm (except Fig 24 = 0.5 mm).