Segonalia steinbachi Young, 1977

Cavichioli, Rodney R. & Takiya, Daniela M., 2016, First record of Segonalia Young (Hemiptera: Cicadellidae: Cicadellinae) from Brazil including the description of S. machadoi sp. nov., Zootaxa 4078 (1), pp. 137-142 : 139-140

Segonalia steinbachi Young, 1977

( Figures 1–9 )

Material examined. 2♂, “ Paraguay \ 1985 \ R. Barragán” ( DZUP); 5♂, “ Brasil, Minas Gerais,\ PN [Parque Nacional] da Serra do Cipó 9–\ 13.XII.2011 (Malaise)\ Santana do Riacho,\ Córrego das Pedras”, “19˚22’17”S\ 43˚36’03”W 766m \ Monné, M.L.; Santos\ A.; Takiya, D.M. &\ Cavichioli, R.R.”, ( DZUP); 6♂, same data as preceding, ( DZRJ); 1♂, 2♀, “P.N. Serra do Cipó,\ MG, Brasil 19˚20’35”S\ 43˚37’08”W 09–\ 13.XII.2011 \ R.R. Cavichioli leg.”, ( DZUP); 1♀, “ Brazil:\ Minas Gerais\ Santa Vitoria”, “ II.1970 \ F.M. Oliveira\ B.M. 1971-165”, ( DZUP).

Measurements (length in mm). Males, 5.4–5.5 (5.2 in Young 1977). Females, 5.4–5.5 (5.3–5.5 in Young 1977).

Distribution. Santa Cruz (type locality), Bolivia; Brazil [new record]; Paraguay [new record].

Remarks. Young (1977, Figure 813c) illustrates the male pygofer of this species with a serrate ventral margin, but does not mention this characteristic in the description. Based on the study of our specimens, this serration is apparently due to the surface sculpturing of the pygofer, consisting of dentiform cuticular projections, which when observed on the pygofer margins give the impression of a serrate margin.

Furthermore, Young (1977) states that the characteristic unpaired paraphysis of Segonalia does not lie medially and is asymmetrical. Because the paraphysis connects to the aedeagus through a membrane, the position in relation to the aedeagus can vary and it may lie medially or laterally to the aedeagus (as originally illustrated). Nevertheless, its basal portion and ramus are structurally symmetrical. Therefore, specimens of Segonalia in Young’s (1977) key to genera of New World Cicadellini will not key out correctly given the Segonalia exit in couplet 87: “Paraphyses with a simple ramus that is not median”.

Figures

FIGURES 1 – 9. Segonalia steinbachi Young, 1977. 1. dorsal habitus; 2. male genital chamber, lateral view; 3. valve and subgenital plates, ventral view; 4. connective and styles, dorsal view; 5. aedeagus, paraphysis, and anal tube, lateral view ;; 6. female sternite VII, ventral view; 7. female genital chamber, lateral view; 8. base of right first valvula of ovipositor, ventral view; 9. second valvula of ovipositor, lateral view. BPP = basal portion of paraphysis; scale bars = 1.0 mm (Fig. 1) and 0.5 mm (Figs 2 – 9).