Oragua linnavuorii, Mejdalani, Gabriel, Da Silva, Cristiane M. F. & Takiya, Daniela M., 2016

Mejdalani, Gabriel, Da Silva, Cristiane M. F. & Takiya, Daniela M., 2016, Two new species of the sharpshooter genus Oragua Melichar, 1926 from Southeastern Brazil (Hemiptera: Cicadellidae: Cicadellini), Zootaxa 4132 (3), pp. 422-430 : 423-426

Oragua linnavuorii sp. nov.

( Figures 1–11 , 15 , 18 )

Total length: 10.3 mm (male holotype), 9.9–10.4 mm (male paratypes, n = 6), 9.2 mm (female paratypes, n = 2).

Male holotype. Head and thorax. Head ( Fig. 1 ), in dorsal view, triangular, moderately produced anteriorly; median length approximately 1/2 of interocular width and 1/3 of transocular width; anterior margin narrowly rounded at apex; surface of crown coarsely punctate; median portion distinctly and broadly concave; area between eye and ocellus slightly concave; coronal suture indistinct. Antennal ledges, in dorsal view, slightly protuberant; in lateral view, with anterior margin almost vertical and slightly concave. Ocelli located approximately on imaginary line between anterior eye angles. Frons and clypeus coarsely punctate. Epistomal suture complete, inconspicuous. Clypeus ( Fig. 9 ) with superior portion continuing profile of frons and inferior portion more nearly horizontal. Thorax ( Figs 1 , 15 ) with pronotal width approximately equal to transocular width; lateral margins slightly convergent anteriorly; dorsopleural carinae incomplete, not attaining posterior margin of eye; anterior portion of pronotal disc without pair of broad shallow depressions; pronotal surface coarsely punctate and with transverse rugae. Macropterous ( Fig. 9 ), fore and hind wings extending posteriorly distinctly beyond pygofer apex; forewings with membrane not abruptly delimited from remainder of surface, texture of portion before membrane coriaceous and punctate; base of fourth apical cell located more proximally than base of third; hind wings with vein R2+3 incomplete. Hind legs with femoral setal formula 2:1:1. First tarsomere of hind legs with length approximately equal to combined length of two more distal tarsomeres and with two irregular longitudinal rows of small setae on plantar surface.

Color ( Fig. 15 ). Head, thorax, forewings, and legs brown to dark brown. Crown and pronotum with sparse yellow dots; mesonotum with pair of yellow dots on scutum (paratypes may have additional marks) and pair of lateral yellow maculae on scutellum. Corium and clavus of forewings with some elongate, irregular yellow lines located mostly on longitudinal veins; small irregular yellow marks also present. Face with sparse yellow dots (very faint in holotype).

Male genitalia. Pygofer ( Fig. 2 ), in lateral view, moderately produced posteriorly; posterior margin broadly rounded; macrosetae distributed mostly on posterior 2/3 of disc, except dorsally; posteroventral margin ( Fig. 3 ) with well-developed dentiform process directed inwards. Valve ( Fig. 4 ), in ventral view, with posterior margin produced posteriorly, convex. Subgenital plates ( Figs 2, 4 ), in ventral view, subtriangular and elongate, extending as far posteriorly as location of dentiform pygofer processes; connected to each other basally by triangular membranous area ( Fig. 2 ); with irregular longitudinal row of macrosetae; inner margin of apical third with some smaller setae. Styles ( Fig. 5 ), in dorsal view, without outer preapical lobe; apex broad and truncate. Connective ( Fig. 5 ), in dorsal view, Y-shaped; stalk broad, with slight median keel and pair of lateral delicate flanges. Aedeagus ( Figs 7, 8 ) symmetrical; shaft, in lateral view, curved dorsally; basidorsal and basiventral apodemes well-developed; apex with pair of small curved processes directed ventrolaterally ( Fig. 8 ); gonopore located apically. Paraphyses ( Fig. 6 ) articulated with connective; in dorsal view, with stalk short and thick; rami asymmetrical in form and in position, elongate, very slender, divergent at base.

Female. Similar in color and external form to male but submacropterous ( Figs 10 , 18 ) and thus of a smaller total length than the latter; fore and hind wings extending just slightly beyond apex of pygofer and gonoplacs ( Fig. 11 ) or apical portion of these structures exposed ( Fig. 18 ); forewings with apical cells distinctly smaller than those of male. Sternite VII ( Fig. 11 ), in ventral view, with strong, posteromedian triangular projection (spiniform in lateral view; Fig. 10 ).

Known distribution. Atlantic Forest, Southeastern Brazil (Mantiqueira mountain range), Rio de Janeiro State.

Type material. Male holotype: “RJ: Itatiaia 1442m \ P.N. do Itatiaia \ 20/12/2013 \ 22°25'42.6"S \ 44°37'42.2"W \ R. Monteiro et al. col.” ( DZRJ). Paratypes: four males, same data as holotype (two at DZRJ, one at DZUP, one at MNRJ); two males, one female: “ BRASIL, RJ, Itatiaia, PN do \ Itatiaia, Trilha 3 Picos \ S 22°26'01.4" W 44°36'49.5" \ 1070m 05.xii.2015 \ Takiya, \ Paladini, Freitas & Ferreira” ( DZRJ); one male, one female, “ BRASIL, RJ, Itatiaia, PN do \ Itatiaia, Travessia Rui Braga \ S 22°25'50.4" W 40°37'12.6" \ 1100m 06.xii.2015 \ Takiya, \ Santos, Freitas & Ferreira” ( MNRJ); one male, “ BRASIL \ Itatiaia \ (1.100 Mtr.) \ Est[ado] do Rio [de Janeiro] \ Dirings”; “ NOV · 1962 ” ( MZSP); one male, “Campo Bello [probably Itatiaia] \ Brazil \ X. ‘36”; “A. Maller, Coll. \ Frank Johnson \ Donor” ( NCSU). The holotype is in excellent condition; the tarsus of the right middle leg fell apart and was glued to the supporting triangle; genitalia were dissected.

Etymology. This interesting new species is described in honor of Dr. Rauno Linnavuori in recognition of his remarkable contribution to our knowledge of the diversity, taxonomy, and morphology of leafhoppers and other hemipterans of the world.

Taxonomic notes. See discussion below.

Figures

FIGURE 18. Submacropterous female of Oragua linnavuorii sp. nov. photographed at the type locality by Camilo Flórez-V. Note the exposed apical portion of the abdomen.

FIGURES 1 – 8. Oragua linnavuorii sp. nov. (male). 1, crown, pronotum, and mesonotum (location of pin indicated), dorsal view. 2, pygofer and subgenital plate, lateral view. 3, apex of pygofer, caudal view. 4, valve and subgenital plate, ventral view. 5, connective and style, dorsal view. 6, paraphyses, dorsal view. 7, aedeagus and anal tube, lateral view. 8, apical portion of aedeagus, caudal view. DPR = dentiform process of pygofer. Scale bars: 1 = 2 mm, 2 – 4 = 1 mm, 5 – 7 = 0.5 mm.

FIGURES 9 – 11. Oragua linnavuorii sp. nov. 9 - 10, body in lateral view of macropterous male (length 10.4 mm) and submacropterous female (length 9.2 mm), respectively. 11, apical portion of female body showing sternite VII, ventral view. SVII = sternite VII.

FIGURES 15 – 17. Body in dorsal view (antennae and legs not depicted). 15, male paratype of Oragua linnavuorii sp. nov. (total length 9.9 mm), yellow color of body marks altered due to previous preservation in alcohol. 16, male holotype of O. flavolineata sp. nov. (total length 9.8 mm), slightly laterodorsal. 17, male of Aguana sp. (total length 15.3 mm). The anterior margin of the crown is obtusely rounded in Oragua, whereas it is broadly rounded and truncate medially in Aguana. See discussion for additional differences between the two genera.