Balala, Distant, 1907

Tang, Jiu & Zhang, Yalin, 2020, Review of the Oriental leafhopper genus Balala Distant, with new species and new records (Hemiptera: Cicadellidae: Hylicinae), Zootaxa 4731 (1), pp. 23-42 : 25

publication ID	https://doi.org/ 10.11646/zootaxa.4731.1.2
publication LSID	lsid:zoobank.org:pub:FC77AA02-EE32-4BDE-8A8A-6AE9B8A8D3AA
persistent identifier	https://treatment.plazi.org/id/8F4E87BD-FFBC-FFEA-D0BC-FB1A7D94F811
treatment provided by	Plazi
scientific name	Balala
status

Treatment

Key to species of genus Balala View in CoL (males)

1 Scutellum apex not extended to apex of clavus, centre compressed vertically into keel, subapex truncate in lateral view ( Figs. 4B, D View FIGURE 4 , 8A, C View FIGURE 8 )........................................................................................ 2

- Scutellum apex reaching apex of clavus, centre moderately swollen, gradually declined toward apex in lateral view ( Figs. 1A, B View FIGURE 1 , 2C, D View FIGURE 2 , 5A, D View FIGURE 5 , 6A, B View FIGURE 6 , 9A, B, H, I View FIGURE 9 )...................................................................... 3

2 Crown anterior margin slightly angulate, three tubercles at apex ( Fig. 4C View FIGURE 4 ), pygofer ventral appendage with apical 2/5 strongly recurved, hook-like ( Fig. 4F View FIGURE 4 )..................................................................... B. curvata View in CoL

- Crown anterior margin round, without tubercle at apex ( Fig. 8A View FIGURE 8 ), pygofer ventral appendage gradually curved dorsad, not hooklike ( Fig. 8G View FIGURE 8 )......................................................................... B. hainana View in CoL sp. nov.

3 Aedeagus shaft without process, pygofer ventral appendage with apex curved backward ( Figs. 1D, H View FIGURE 1 )........ B. fulviventris View in CoL

- Aedeagus shaft with one or more processes, pygofer ventral appendage with apex curved dorsad ( Figs. 3C, E View FIGURE 3 , 5H, J View FIGURE 5 , 7I, L View FIGURE 7 , 10C, G View FIGURE 10 , 11F, H View FIGURE 11 )........................................................................................... 4

4 Aedeagus shaft with pair of slender furculae at apex ( Figs. 10F View FIGURE 10 , 11I View FIGURE 11 ), pygofer ventral appendage with one small preapical tooth ( Figs. 10C View FIGURE 10 , 11E View FIGURE 11 )...................................................................................... 5

- Aedeagus shaft without furculae at apex ( Figs. 3A View FIGURE 3 , 5H View FIGURE 5 , 7I View FIGURE 7 ), pygofer ventral appendage tapering to tip, without small preapical tooth ( Figs. 3F View FIGURE 3 , 5J View FIGURE 5 , 7B View FIGURE 7 )................................................................................. 6

5 Aedeagus shaft with pair of small horn-like processes present on basal part of dorsal surface submedially ( Fig. 10I View FIGURE 10 )............................................................................................. B. karenia View in CoL sp. nov.

- Aedeagus shaft without any process on dorsal surface ( Fig. 11J View FIGURE 11 )................................ B. mekongia View in CoL sp. nov.

6 Frontoclypeus and anteclypeus dark or not ( Figs. 5F View FIGURE 5 , 6D View FIGURE 6 ), aedeagus shaft wide and flat, with pair of lateral subapical processes, lateral margin serrate in front of lateral process ( Figs. 5H View FIGURE 5 , 7 View FIGURE 7 G–I)................................................ 7

- Frontoclypeus and anteclypeus dark ( Fig. 2B View FIGURE 2 ), aedeagus shaft tubular without lateral subapical process, lateral margin not serrate ( Figs. 3A, C View FIGURE 3 )............................................................................ B. nigrifrons View in CoL

7 Aedeagus with median longitudinal ridge very strong through entire shaft, lateral process keen-edged, gonopore truncate and subapical on ventral surface ( Figs. 5G, H View FIGURE 5 )............................................................... B. lui View in CoL

- Aedeagus shaft without median longitudinal ridge, lateral process short and blunt, gonopore round on apex ( Figs. 7G, I View FIGURE 7 )......................................................................................... B. fujiana View in CoL sp. nov.