Chaeridiona Baly

Shameem, K. M. & Prathapan, K. D., 2014, A new species of Chaeridiona Baly (Coleoptera: Chrysomelidae: Cassidinae: Oncocephalini) infesting ginger (Zingiber officinale Roscoe) and turmeric (Curcuma longa L.) in India and redescription of Chaeridiona pseudometallica Basu, Zootaxa 3815 (4), pp. 575-582 : 580

Key to species of Indian Chaeridiona Baly

1 Exterior apical angle of elytra angulate or denticulate (Figs 1 & 2)............................................... 2

- Exterior apical angle of elytra rounded (Figs 6 & 7)......................................................... 3

2 Dorsum dark brown with purplish tinge; elytral costae 1–4 interrupted................................. C. picea Baly

- Dorsum metallic emerald green to dull green except coppery brown laterally and preapically; elytral costa three interrupted.......................................................................................... C. mayuri n. sp.

3 Elytra distinctly tuberculate; costae not visible between tubercles; dorsum brown, without metallic sheen................................................................................................. C. tuberculata Uhmann

- Elytra not tuberculate; costae visible; dorsum with metallic sheen.............................................. 4

4 Anterolateral pronotal angle with single tooth (Fig. 8); length 3.2–3.5 mm ..................... C. pseudometallica Basu

- Anterolateral pronotal angle with two teeth (Fig. 3); length 4.3–5.0 mm.............................. C. metallica Baly