Dikrella (Dikrella) aculeata, Coelho & Nessimian, 2009

Coelho, Luci Boa Nova & Nessimian, Jorge Luiz, 2009, Three new species of Dikrella Oman (Hemiptera: Cicadellidae: Typhlocybinae) from Minas Gerais State, Brazil, Zootaxa 2142 (1), pp. 20-28 : 22-23

Dikrella (Dikrella) aculeata , sp.nov.

( Figs 3–5 , 12–20 )

Total length 2.6–2.8 mm. General color pale-yellow; eyes brown. Crown with median length approximately equal to interocular width at base; median length of pronotum approximately equal to that of crown, margin of laterobasal angles distinctly exceeding width of head. Forewing translucent-yellow, apical third of costal margin and apical cells ochre-smoked, vein MP 1 with small brown spot on apical half; basal region of apical cell IV, including the vein ScP+RA, translucent; vein RP with round translucent subterminal area; external margin of apical cell IV with small brown spot near base; apical cells II and III much shorter than cell I; apex of apical cell IV not reaching wing apex. Hind wing with vein CuA 2 originating from point slightly more basal than MP 2.

Subgenital plate with three macrosetae near external margin and concentrated group of microsetae on median third; three short and robust setae on apical third. Pygofer long, posterior margin narrow, with short ventroposterior lobe bearing four setae distributed from ventral base to apex; thin process arising internally exceeding posterior margin of pygofer and turned upward; discal region, preapically, with many microsetae distributed from dorsal margin to near ventral margin, forming wide transverse band. Stylus with preapical lobe poorly developed, without setae; apical extension hook-like with acute apex. Connective T-shaped with main stem long and narrow and lateral arms short. Aedeagus with preatrium short, tubular, rectilinear, continuous with main stem; a pair of ventral processes, long, tubular, following ventrally the main stem, with bases fused next to base of aedeagus stem, with thin apices not reaching apex of aedeagus; gonopore apical. Female unknown.

Etymology. The species epithet, aculeata , refers to the form of the pygofer processes.

Type material. Male holotype: Mata do Paraíso, Viçosa, Minas Gerais, Brasil, 12/vi/1986, P.S.F. Ferreira leg. (DZRJ). Paratypes (males): same locality and collector as holotype , 1 specimen (22/x/1986) ( DZRJ) , 1 specimen (2/vi/1987) ( MEUV) , 3 specimens, (11/v/1988) ( DZRJ) , 1 specimen (20/v/1988) ( MEUV) , 1 specimen (1/vi/1988) ( MEUV) , 3 specimens (10/vi/1988) ( MEUV) , 1 specimen (31/iii/1993) ( MNRJ) .

Comments. The new species can be distinguished from the others of the subgenus Dikrella mainly by the form of the aedeagus ( Figs 19, 20 ) and pygofer process ( Figs 15, 16 ).

Figures

FIGURES 3–11. Dikrella (Dikrella) aculeata, sp.nov.: 3, habitus (laterodorsal view); 4, crown, pronotum and scutelum (dorsal view); 5, face (ventral view); Dikrella (Dikrella) reticulata, sp.nov.: 6, habitus (laterodorsal view); 7, crown, pronotum and scutelum (dorsal); 8, face (ventral); Dikrella (Readionia) spinifera, sp.nov.: 9, habitus (laterodorsal view); 10, crown, pronotum and scutelum (dorsal view); 11, face (ventral view).

FIGURES 12–20. Dikrella (Dikrella) aculeata, sp.nov.: 12, forewing; 13, hind wing; 14, subgenital plate (ventrolateral view); 15, pygofer (lateral view); 16, apical region of pygofer (lateral view); 17, stylus (ventral view); 18, stylus (lateral view); 19, aedeagus and connective (ventral view); 20, aedeagus (lateral view)