Geitogonalia tetracorni Cavichioli & Rendón-Mera & Domahovski & Mejdalani 2018, sp. nov.
Creators: name: Cavichioli, Rodney R.
name: Rendón-Mera, Diana I.
name: Domahovski, Alexandre C.
name: Mejdalani, Gabriel
Publisher: name: Zenodo
Year: 2018
Subjects: Biodiversity
Taxonomy
Animalia
Arthropoda
Insecta
Hemiptera
Cicadellidae
Geitogonalia
Geitogonalia tetracorni

description: Geitogonalia tetracorni sp. nov.
(Figs 22–35)
Diagnosis. Aedeagus (Figs 29, 30) shaft short and stout, slightly narrower apically, apex dorsally with pair of strong horn-shaped processes directed anterodorsally, ventrally with pair of horn-shaped processes directed anteroventrally. Female abdominal sternite VII (Fig. 31) posterior margin concave on each side of dentiform projection.
Measurements (in mm; 2 ♂, 2 ♀). Length of body ♂ 6.3–6.7, ♀ 6.7–7.1.
Male. Coloration. Anterior dorsum (crown, pronotum, and mesonotum) yellow (Figs 22, 23). Crown with black transverse stripe posteriorly, strongly broadening on each side of midline between ocellus and eye; sometimes with medial black spot anteriorly. Pronotum with black transverse stripe at posterior margin. Mesonotum with small black spot laterally on mesoscutum anterior margin. Forewing (Figs 22, 23) orange in its basal fourth; corium and clavus greenish; apex black; veins yellow, but R faded. Face (Fig. 24) yellow; gena black posteriorly to eye only; clypeus slightly lighter along its lateral and ventral margins; rostrum black. Thorax lateral and ventral portions yellow. Legs yellowish-orange, protibia brown basally, almost black towards apex, mesofemur black. Abdomen black.
Structure. Head (Figs 22–24) moderately produced anteriorly, median length of crown approximately 6/10 of interocular width and 4/10 of transocular width; each ocellus slightly closer to midline of crown than to adjacent anterior eye angle. Other features as in G. piei sp. nov.
Male genitalia. Pygofer (Fig. 25), in lateral view, well produced posteriorly; posterior margin broadly rounded; without processes; macrosetae distributed on posterior third of disk and extending anteriorly along ventral and dorsal margins; thin setae present ventrally on medial third. Valve (Fig. 26), in ventral view, with lateral margins rounded, constricted medially. Subgenital plate (Fig. 26), in ventral view, triangular, not fused to its counterpart basally, outer lateral margin slightly sinuous, narrowing gradually towards apex, with uniseriate row of macrosetae intercalated with thin setae; in lateral view, not extending posteriorly as far as pygofer apex. Connective (Fig. 27), in dorsal view, T-shaped, stalk long and narrow, distinctly longer than arms, keeled dorsally, transition from arms to stalk gradual. Style (Fig. 27), in dorsal view, with apophysis elongate, distinctly longer than apodeme, not extending as far posteriorly as connective; with lobe on outer median portion bearing single elongate seta, apex narrow, obliquely truncate. Paraphyses (Fig. 28) present but very small, consisting of well sclerotized basal transverse plate and pair of weakly sclerotized rami with sclerotized apices, curved inwards and upwards. Aedeagus (Figs 29, 30) symmetrical; without preatrial process; dorsal apodeme longer and narrower than shaft, apex slightly curved anterolaterally; shaft short and stout, slightly narrower apically, apex dorsally with pair of strong horn-shaped processes directed anterodorsally, about 1/4 as long as shaft, ventrally with pair of horn-shaped processes directed ventrally and outwards, shorter than dorsal processes.
Female. Coloration. As in male, except larger black spot extending to base of frons, visible from dorsal and anterior view.
Structure. As in male.
Female genitalia. Abdominal sternite VII (Figs 31, 32), in ventral view, slightly longer than wide, posterior margin concave on each side of dentiform projection. “Internal” sternite VIII, in dorsal view, without distinct sclerotized areas. Pygofer (Fig. 32), in lateral view, strongly produced posteriorly, posterior margin narrowly rounded, macrosetae located mostly on posterior portion and extending anteriorly along ventral margin. First valvifer (Fig. 33) about as long as wide. First valvula (Fig. 33) slightly curved dorsally, with apex acute; dorsal sculptured area strigate, extending from basal portion of blade to apex; ventral sculptured area scale-like, restricted to apical portion of blade; ventral interlocking device restricted to basal half of blade, located along ventral margin with distal portion directed dorsally. Second valvula (Fig. 34) moderately expanded beyond basal curvature; dorsal margin moderately convex; ventral margin with slight preapical prominence; apex subacute; blade with about 27 subtriangular continuous teeth; denticles distributed on teeth and on dorsal and ventral apical portions of blade; ducts extending to apical portion of blade and to teeth or terminating below them (about five basal-most teeth do not receive ducts). Gonoplac (Fig. 35) with basal half narrow and apical half distinctly expanded; apex obtuse; blade with many tiny spiniform processes on apical portion and extending anteriorly along ventral margin.
Etymology. The specific epithet refers to the four horn-shaped apical processes of the aedeagus (Figs 29, 30).
Material examined. Holotype Ƌ: Southern Brazil, state of Paraná: “Brasil, PR [Paraná], S. [São] J. [José] dos Pinhais \ Rep. [Represa] Guaricana, Malaise, \ 25.7272°S 48.9498°W, 760m \ 23.XI–12.XII.2017, Muniz, \ Melo,Cavichioli&Domahovski” (DZUP). Paratypes: 1 ♂: “ Brasil, PR, S.J. dos Pinhais \ Rep. Guaricana, Malaise, \ 25.7176°S 48.9640°W, 760m \ 09.I–01.II.2018, Muniz, Melo, \ Cavichioli & Domahovski” (DZUP); 1 ♂: same data as preceding except “ 01–20.II.2018 ” (DZUP); 1 ♂ and 10 ♀: “ Brasil, PR, S.J. dos Pinhais \ Rep. Guaricana, Sweep \ 25.7150°S 48.9711°W \ 750a 400m 12–14.XII.2017 \ Cavichioli & Domahovski” (DZUP; 1 ♀ MNRJ); 1 ♂: “ 25°50’S 790m \ 48°56’W X/2003 \ Paraná—Brasil \ G.R.A Melo col.” (DZUP); 2 ♂: same data as preceding except “ XI/2003 ” (DZUP); 1 ♂ and 2 ♀: same data as preceding except “ XII/2003 ” (DZUP); 1 ♀: “ BRASIL, Paraná, Tijucas \ do Sul, Parque Ecológico \ VIVAT Floresta, (F100) \ 25°57’32.5”S 49°15’10.5”W \ Malaise 24.IX.2004 \ PROVIVAT” (DZUP); 1 ♂: “ BRASIL, Paraná, Tijucas \ do Sul, Parque Ecológico \ VIVAT Floresta, (P100) \ 25°57’31.5”S 49°15’2.5”W \ Malaise 25.II.2005 \ PROVIVAT” (DZUP); 1 ♂ and 1 ♀: same data as preceding except “ 15.IV.2005 ” (MNRJ); 2 ♀: same data as preceding except “ 13.V.2005 ” (DZUP); 1 ♀: same data as preceding except “ 01.VII.2005 ” (DZUP); 1 ♀: same data as preceding except “ 08.VII.2005 ” (DZUP); 1 ♀: “DPT° ZOOL \ UF-PARANÁ; BR 277 KM 54 \ T. TELEPAR \ 26-XI-22-XII-84 \ CIIF—MALAISE” (DZUP); 1 ♂: same data as preceding except “ 5–11-XII-1984 ” (DZUP); 1 ♀: “ Piraquara, Paraná, \ Mananciais da Serra \ 18/ X/2011 25°29’S \ 48°58’W 1060m \ A. C. Domahovski leg” (DZUP); 1 ♂: “ Parque Estadual do \ Marumbi, Piraquara—PR \ 25°29’13”S 48°58’30”W \ 24.I.2012 LUZ Grossi, \ Cavichioli & Silva legs.” (DZUP); 1 ♀: “ Brasil, Paraná, São José \ dos Pinhais, Br 277 Km 54 \ (Torre—Telepar) 1060m \ 25°33’18”S 48°58’22”W \ Malaise 15–22.IX.2015 \ ACD & RRC leg.” (DZUP); 1 ♀ same data as preceding except “ 01–15.X.2015 ” (DZUP); 2 ♀: “S. JOSE PINHAIS—PR \ Ser. Mar Br 277 Km 54 \ Brasil 02.XI.1987 \ Lev. Ent. PROFAUPAR \ MALAISE” (DZUP); 1 ♂: same data as preceding except “ 23.XI.1987 ” (DZUP).
Remarks. As mentioned above, this new species and G. buccina sp. nov. are very similar in coloration, but the aedeagus of the former has two pairs of apical processes, one dorsally and another ventrally (Figs 29, 30).
description: Published as part of Cavichioli, Rodney R., Rendón-Mera, Diana I., Domahovski, Alexandre C. & Mejdalani, Gabriel, 2018, Three new Brazilian species of the sharpshooter genus Geitogonalia Young (Hemiptera: Cicadellidae: Cicadellini), pp. 578-588 in Zootaxa 4531 (4) on pages 584-587, DOI: 10.11646/zootaxa.4531.4.8, http://zenodo.org/record/2614943