Dikrella (Dikrella) reticulata, 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 : 24-26

Dikrella (Dikrella) reticulata , sp.nov.

( Figs 6–8 , 21–28 )

Total length 3.0–3.2 mm. General color varying from light-yellow to ochraceus, eyes brown. Median length of crown longer than interocular width on base; crown with spots on basal half, contiguous to those of pronotum, forming bands; one median white band on coronal suture, and a red band on each side; front little long than wide; pronotum approximately three times longer than crown length, margin of laterobasal angles not exceeding width of head; anterior margin with white spots, irregular, immediately behind each eye. Forewing with smoked areas on apex of cell cup and apical cells; vein ScP+RA marked along half of its extension by brown spot and vein MP 2 +CuA 1 with small brown spot near base; apical cell I distinctly wider than apical cells II and III, these wider on apex than on base; apical cell II thinner than others; apical cell IV quadrangular. Hind wing with vein CuA 2 originating from point slightly more basal than MP 2; vein CuP confluent with submarginal vein more basally than bifurcation of CuA.

Subgenital plate with margins convergent from basal third to twisted apex; external margin with scattered small and delicate setae; central region of basal half bearing longitudinal series of four macrosetae; apical half with surface irregularly rugose. Pygofer long, with posterior margin sharpened into lobe tapered on apex bearing concentrated group of small robust setae; dorsal margin with external process gradually tapering to apex, not reaching apex of pygofer. Stylus long, with long filiform biseriate setae on preapical lobe and, uniseriate on apical region; apex thin, slightly curved upward. Connective T-shaped, with subterminal articulation with stem of aedeagus; main stem shorter than lateral arms. Aedeagus with well developed atrial complex, with pair of long and robust processes, arising on preatrial anterior region, with fused bases; apical half of processes with ridges forming irregular reticulum; aedeagal stem proportionally short, apical region abruptly compressed laterally, forming ventroapical keel; gonopore apical. Female unknown.

Etymology. The species epithet, reticulata , refers to the texture of the aedeagal processes.

Type material. Male holotype: Mata do Paraíso, Viçosa, Minas Gerais, Brasil, 14/ix/1986, P.S.F. Ferreira leg. ( DZRJ) . Paratypes (males): same locality and collector as holotype, 1 specimen (23/ix/1986) ( DZRJ) , 1 specimen (22/x/1986) ( MEUV) .

Comments. The pygofer form and the form and position of the pygofer process in the new species (fig. 24) are similar to D. venella Ruppel and DeLong , although the latter belongs to the subgenus Readionia . Dikrella (Dikrella) reticulata sp. nov. can be distinguished from the other species of the genus mainly by the aedeagus form ( Figs 27, 28 ), with the preatrial region well developed, the pair of preatrial processes positioned away from the aedeagus stem, and by the T-shaped connective ( Fig. 27 ), with subterminal articulation with the aedeagal stem.

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 21–28. Dikrella (Dikrella) reticulata, sp.nov.: 21, forewing; 22, hind wing; 23, subgenital plate (ventrolateral view); 24, pygofer (lateral view); 25, stylus (ventral view); 26, stylus (lateral view); 27, aedeagus and connective (ventral view); 28, aedeagus (lateral view).