Dilobopterus sakakibara, Quintas & Felix & Lima & Mejdalani, 2017

Quintas, Victor, Felix, Márcio, Lima, Douglas Felipe Dos Santos & Mejdalani, Gabriel, 2017, Two new species of Dilobopterus Signoret, 1850 and the male of D. segmentalis (Signoret, 1853) from Southeastern Brazil, with taxonomic notes on the genus (Hemiptera: Cicadellidae: Cicadellini), Zootaxa 4281 (1), pp. 127-134 : 130-131

Dilobopterus sakakibara sp. nov.

( Figures 9–16 , 27 )

Total length 6.9 mm (male holotype), 6.8 mm (male paratypes, n = 2).

Head ( Figs. 9 , 27 ) well produced anteriorly; frons with muscle impressions distinct. Hind legs with meron not exposed. Other features of head and thorax much as described above for D. nelsoni sp. nov.

Color ( Figs. 9–10 , 27 ). Ground color of anterior dorsum dark brown to black. Crown with yellow marks as follows: pair of strongly curved stripes on posterior half of disc, pair of elongate, anteriorly convergent marks near anterior margin, pair of spots just before anterior eye angles, pair of spots at posterior margin, and smaller marks on areas of muscle impressions of frons and behind eyes. Pronotum with two transverse rows of four yellow spots near anterior margin, spots of anterior row smaller than those of posterior row. Mesonotum with large yellow area on posterior portion of scutum and covering much of scutellum. Forewings dark brown; with large yellow mark on basal third of clavus, adjacent to that of mesonotum when wings are at rest, and much smaller yellow mark on wing base; with large subrectangular vitreous area on basal half extending from costal margin to apical portion of clavus, allowing observation of two large transverse yellow areas of abdominal tergum; apical cells hyaline. Ground color of face dark brown to black; superior half of frons yellow below antennal ledges and with yellow arcs at region of muscle impressions; genae yellow below eyes, this yellow area extending posteriorly over pro- and mesothorax. Ventral region of thorax, including basal portions of legs, mostly dark brown to black; pro- and mesofemora dark brown to black basally, most of hind femora dark brown, hind coxae with large yellow mark on outer lateral portion. Abdomen, in ventral view, with sternites dark brown, their posterior margins yellow; most of laterotergites yellow.

Male genitalia. Pygofer ( Fig. 11 ), in lateral view, strongly produced posteriorly; posterior margin narrowly rounded; without processes; with numerous dispersed macrosetae absent only on basal fourth. Subgenital plates ( Fig. 12 ), in ventral view, subtriangular; not extending as far posteriorly as pygofer apex; separated from each other throughout their length; with multiseriate macrosetae on ventral surface, microsetae also present. Connective ( Fig. 13 ), in dorsal view, T-shaped but with stalk directed dorsoanteriorly; without median keel. Style ( Fig. 13 ), in dorsal view, elongate, extending posteriorly distinctly farther than apex of connective; with preapical lobe bearing few setae; apex finger-shaped, directed outwards. Aedeagus ( Fig. 14 ) symmetrical; shaft, in lateral view, with well developed dorsal lobe; without processes; gonoduct distinct; gonopore located apically. Paraphyses ( Figs. 15–16 ) with rami slightly asymmetrical and bearing numerous conspicuous setae on apical portion.

Female unknown.

Known distribution. Atlantic Forest, Southeastern Brazil, Rio de Janeiro State.

Type material. Male holotype: “ BRASIL - RJ [Rio de Janeiro State] \ Parque Nac. [Nacional] do Itatiaia \ 06/ XI/2009 \ M.A. & M.L. Monné col.” ( MNRJ) . Paratypes: two males, “BR/RJ/ Parq. Nac. \ Itatiaia 750-1250m \ 0 6 - 08/II/2009 \ MONNÉ & MONNÉ col . ” and “BR/RJ – Parque Nacional do \ Itatiaia \ 03/X/2013 \ M.L. Monné, J.P. Botero, A. \ Carelli & M.A. Monné cols.” ( MNRJ, DZRJ) .

Etymology. It is a pleasure to name the new species in honor of Prof. Dr. Albino Morimasa Sakakibara (Departamento de Zoologia, Setor de Ciências Biológicas, Universidade Federal do Paraná) in recognition of his outstanding contribution to our knowledge of the Neotropical treehoppers. The species epithet is a noun in apposition.

Taxonomic notes. Dilobopterus sakakibara sp. nov. is most similar to D. trinotatus ( Signoret, 1853) and D. segmentalis ( Signoret, 1853) . These three species share the presence of conspicuous setae on the apical portion of the paraphyses rami ( Figs. 15 , 23 ). This is a peculiar feature that suggests that they form a group within Dilobopterus , which we herein call the trinotatus group. The new species ( Fig. 27 ) shares with D. segmentalis ( Fig.

28) the presence of a large subrectangular vitreous area on the basal half of the forewings, which allows the observation of large transverse yellow areas of the abdominal tergum. In the new species, the pronotum ( Figs. 9 , 27 ) is dark brown and has two transverse rows of four yellow spots near the anterior margin, whereas in D. segmentalis the pronotal disc ( Figs. 17 , 28 ) has a large greenish-yellow or green central area, dark brown lateral and posterior margins, and irregular dark brown to black marks near the anterior margin.

Figures

FIGURES 9 – 16. Dilobopterus sakakibara sp. nov. 9, head, pronotum, and mesonotum, dorsal view (male paratype). 10, forewing. 11 – 16, male genitalia. 11, pygofer, lateral view. 12, valve and subgenital plate, ventral view. 13, connective and style, dorsal view. 14, ejaculatory reservoir and aedeagus, lateral view. 15, paraphyses, laterodorsal view (setae of one ramus omitted). 16, paraphyses, dorsal view. Scale bars: 9 = 1 mm, 10 = 2 mm, 11 – 16 = 0.5 mm.

FIGURES 26 – 29. Body in dorsal view (antennae and legs not depicted). 26, Dilobopterus nelsoni sp. nov., male holotype (total length 6.7 mm). 27, D. sakakibara sp. nov., male holotype (t. l. 6.9 mm). 28, D. segmentalis (Signoret, 1853), male (t. l. 9.0 mm). 29, D. trinotatus (Signoret, 1853), female (t. l. 9.0 mm). The last three species belong to the trinotatus group (see text for details).

FIGURES 17 – 25. Dilobopterus segmentalis (Signoret, 1853). 17, head, pronotum, and mesonotum, dorsal view. 18 – 24, male genitalia. 18, pygofer, lateral view. 19, pygofer ventral margin (arrow indicates location of small dentiform process), ventral view. 20, valve and subgenital plate, ventral view. 21, connective and style, dorsal view. 22, ejaculatory reservoir, aedeagus, and basal segment of anal tube, lateral view. 23, paraphyses, laterodorsal view (setae of one ramus omitted). 24, paraphyses, dorsal view. 25, apical portion of female abdomen, ventral view. Scale bars = 1 mm.