Homalodisca

Takiya, Daniela M., Cavichioli, Rodney R. & Mckamey, Stuart H., 2006, Brazilian sharpshooters of the genus Homalodisca Stål, 1869 (Hemiptera, Cicadellidae): notes, new records, key to species, first description of the male of H. ignota Melichar, 1924, and a new Northeastern species, Zootaxa 1249, pp. 23-36 : 26

Key to Brazilian Homalodisca species

Acronyms in parentheses refer to Brazilian states from which species are recorded.

1 Crown and pronotum tan to dark­brown not mottled ( Fig. 1 ); mesoscutellum concolorous with mesoscutum ( Fig. 1 ); female hind tibiae with anteroventral (AV) setal row with over 25 modified elongated and curved setae throughout apical 2/3 ( Rakitov 2004: Fig. 11 K); male pygofer processes long, almost attaining or extending posteriorly beyond apex of pygofer ( Fig. 5 ); aedeagus with single pair of atrial processes ( Figs 8, 9 : AP); female sternite VII posterior margin not broadly concave ( Fig. 10 ).. 2

­ Crown and pronotum dark­brown mottled with yellow ( Fig. 3 ); mesoscutellum bright yellow contrasting with darker mesoscutum ( Fig. 3 ); female hind tibiae with AV setal row with approximately 5 modified elongated and curved setae restricted to apex ( Rakitov 2004: Fig. 11 L); male pygofer processes very short modified into a dentiform projection ( Fig. 16 ); aedeagus with two pairs of atrial processes ( Figs 19, 20 ); female sternite VII with posterior margin broadly concave ( Fig. 21 )....................................... 3

2 Smaller, males 10.5–11.0 mm, females 12.0–13.0 mm; frons with large contrasting black macula ventrally ( Marucci et al. 2002: Fig. 2 B); clavus mostly sclerotized between outer vein and suture; aedeagus without pair of apical processes on shaft ( Young 1968: Figs 182f, g) (MG, PR, RJ, RS, SC, SP) .............................. H. ignorata

­ Larger, male 13.5 mm, females 14.0­16.0 mm; frons without large contrasting black macula ventrally (some specimens with frons becoming darker ventrally) ( Fig. 2 ); clavus membranous between outer vein and suture ( Fig. 1 ); aedeagus with pair of laterally directed apical processes on shaft ( Fig. 9 : SP) (RJ, SP) .......................... H. ignota

3 Aedeagus with atrium expanded dorsally, forming lobe between pair of dorsal atrial processes ( Young 1968: Figs 188f, g); ventral pair of atrial processes as long as dorsal pair (except on specimens from Trinidad) ( Young 1968: Fig. 188f) (PA, RR) .............. ................................................................................................................... H. lucernaria

­ Aedeagus with atrium not expanded dorsally ( Figs 19, 20 ); ventral pair of atrial processes shorter than dorsal pair ( Fig. 19 ) (BA, SE) ........................... H. spottii sp. nov.

Figures

FIGURES 1 – 4. Dorsal and lateral habitus. 1 – 2, Homalodisca ignota Melichar, female lectotype, MMBC. 3 – 4, Homalodisca spottii sp. nov., male holotype, DZUP. Scale bars in mm.

FIGURES 5 – 15. Homalodisca ignota Melichar, genital structures. 5 – 9, Male genitalia: (5) pygofer, valve, and subgenital plate, lateral view; (6) valve and subgenital plate, ventral view; (7) connective and style, dorsal view; (8) aedeagus and anal tube, lateral view; (9) aedeagus, caudal view. 10 – 15, Female genitalia: (10) sternite VII, ventral view; (11) base of first valvula of ovipositor, ventral view; (12) base of sternite VII and internal sternite VIII, dorsal view; (13) sternite VII, gonoplac, and pygofer, lateral view; (14) second valvula of ovipositor, lateral view; (15) tooth of median portion of second valvula of ovipositor, lateral view. Scale bars in mm. AP = aedeagal atrium process, PA = aedeagal preatrium, and SP = aedeagal shaft process.

FIGURES 16 – 27. Homalodisca spottii sp. nov., genital structures. 16 – 20, Male genitalia: (16) pygofer, valve, subgenital plate, style, and anal tube, lateral view; (17) valve and subgenital plate, ventral view; (18) connective and style, dorsal view; (19) aedeagus, lateral view; (20) aedeagus, caudal view. 21 – 27, Female genitalia: (21) sternite VII (setae not illustrated) and bases of first valvulae of ovipositor, ventral view; (22) first valvifer and base of first valvulae of ovipositor, lateral view; (23) sternite VII and internal sternite VIII, dorsal view; (24) sternite VII, pygofer, and gonoplac, lateral view; (25) second valvula of ovipositor, lateral view; (26) tooth of median portion of second valvula of ovipositor, lateral view; (27) apex of second valvula of ovipositor, lateral view. Scale bars in mm. AP = aedeagal atrium processes and PA = aedeagal preatrium.