Platygonia, Melichar, 1925

Quintas, Victor, Pecly, Nathalia H., Carvalho, Stéphanie R. & Mejdalani, Gabriel, 2022, Platygonia Melichar, 1925 (Insecta: Hemiptera: Cicadellidae: Cicadellini): a new species from the Brazilian Amazon Rainforest, key to species of the genus, and notes on P. undecimmaculata (Fowler, 1899), European Journal of Taxonomy 806 (1), pp. 177-186 : 183

Key to species of Platygonia (modified from Young 1977)

1. Each forewing with four large yellow spots (two on clavus and two on corium) ( Figs 7–8 ) ............. ................................................................................................... P. undecimmaculata ( Fowler, 1899)

– Forewing without above color pattern .............................................................................................. 2

2. Each forewing with two broad white to pale yellow complete transverse stripes, one at basal third and another just behind claval apex ................................................................. P. zea (Distant, 1908)

– Forewing without above color pattern .............................................................................................. 3

3. Aedeagus, in lateral view, with a ventral process ............................................................................. 5

– Aedeagus, in lateral view, without a ventral process ........................................................................ 4

4. Aedeagus, in lateral view, gradually tapered apically .................................. P. infulata Young, 1977

– Aedeagus, in lateral view, obliquely truncate apically ............................. P. ignifera (Walker, 1851)

5. Crown-face transition without carina. Ventral process of aedeagus located apically (Southeastern Brazil) .......................................................................................................... P. angrana Young, 1977

– Crown-face transition with carina. Ventral process of aedeagus located on median third or more basally (Central America, Colombia, and Northern Brazil) ............................................................. 6

6. Pronotum with a large yellow spot; forewing with a large yellow spot extending from costal margin to median portion of clavus and a large orange spot at apical portion of corium, including anteapical cells .................................................................................................... P. praestantior ( Fowler, 1899)

– Without the above combination of color features ............................................................................. 7

7. Disk of crown convex before ocelli ............................................................... P. detecta Young, 1977

– Disk of crown concave or depressed before ocelli ........................................................................... 8

8. Crown dark brown to black only at lateral margins .............................. P. spatulata (Signoret, 1854)

– Crown almost entirely dark brown to black ( Figs 1–2 ) ............................................ P. nigra sp. nov.

Figures

Figs 7–8. Platygonia undecimmaculata (Fowler, 1899), holotype, ♀. 7. Original illustration provided by Fowler (1899: tab. xvi, fig. 21). 8. Body, in dorsal view, from Wilson et al. (2009).

Figs 1–2. Platygonia nigra sp. nov., holotype, ♂ (INPA). 1. Body, dorsal view. 2. Body, lateral view. Scale bars = 2 mm.