Barolineocerus ornatus Freytag, 2008

Praciano, Daniel Lucas, Dietrich, Christopher H. & Takiya, Daniela Maeda, 2025, Taxonomic revision of the Neotropical leafhopper genus Barolineocerus Freytag, 2008 (Hemiptera: Cicadellidae: Eurymelinae: Chiasmodolini), with descriptions of three new species and an updated key to species, Zootaxa 5653 (4), pp. 451-485 : 479

Barolineocerus ornatus Freytag, 2008

(Figs. 1T–W, 4G–I, 16A–M)

Barolineocerus ornatus Freytag, 2008: 58 , figures 29–31.

Type locality: Saül, French Guiana.

Diagnosis (based on material collected in Brazil). Pronotal macula almost extends to hind margin of pronotum (Fig. 1T, 4G). Claval macula extends distinctly beyond scutellum apex (Fig. 1T, 4G). Abdominal sternite II apodeme almost extending to posterior margin of sternite III ( Fig. 16B ). Pygofer posterior margin with ventral process; with long median process, mostly straight, apex multifurcate ( Figs. 16C–E ). Valve with anterior and posterior margins straight ( Fig. 16F ). Subgenital plate without dorsal process; apex rounded ( Figs. 16G–H ). Aedeagus with dorsal median process; without dorsal subapical ridge; with ventral transverse ridge at apical fourth ( Figs. 16L–M ). Anal tube, laterobasal process with base sinuous at anterior margin, apex distinctly pointed ( Figs. 16C, E ).

Measurements (mm). Males (n= 5), total length (to apex of forewing): 3.80–4.15; median length of crown: 0.26–0.31; length of crown close to eyes: 0.24–0.27; width of head: 1.54–1.56; width of crown between eyes: 0.86–0.88; length of pronotum: 0.39–0.50; length of scutellum: 0.75–0.84; width of pronotum: 1.33–1.39; width of scutellum: 0.97–1.03; length of face: 0.89–0.95; width of face between eyes: 0.84–0.91; distance between ocelli: 0.36–0.38; ocellocular distance: 0.21–0.23; length of clypeus: 0.33–0.35; basal width of clypeus: 0.22; apical width of clypeus: 0.36–0.38; length of forewing: 3.04–3.54.

Distribution. Brazil (Amazonas, Roraima); French Guiana (Camopi, Iracoubo, Maripasula, Saül).

Type examined. 1♂, holotype of Barolineocerus ornatus , “Saul, 28-X-1969 ”, “Piège lumineux”, “GUYANE- MISSION\ BALACHOWSKY-GRUNER\ OCT-NOV. 1969”, “Muséum Paris\ MNHN ( EH)\ 4098”, “ Holotype \ Barolineocerus \ ornatus \ P. H. Freytag 2006”, MNHN .

Additional material. Brazil: 1♂, “BRASIL, AM [Amazonas], Carreiro Castanho \ BR319 Km-181, Sítio S. [São] Paulo \ 4°12'48"S – 60°49'04"W \ 15–30.ix.2016, Malaise\ Grande, J.A. Rafael &\ F.F. Xavier Fº”, INPA ; 2♂, 1♀, “BRASIL, Roraima, Caracaraí, PARNA [Parque Nacional]\ Viruá , 1°29'37"N – 60°59'21"W \ 1–15.v.2017, Malaise grande,\ J.A. Rafael, R. Boldrini —Rede BIA”, DZRJ ; 1♂, 1♀, same data as preceding, except: “ 1°29'23"N – \ 61°0'12"W 1–15.v.2016 \ J.A. Rafael, R. Boldrini \ Arm. Malaise”, INPA ; 1♂, same data as preceding, except: “ 1°27'16"N – 60°59'3"W \ 1–15.v.2016, Malaise grande,\ J.A. Rafael, R. Boldrini —Rede BIA”, DZRJ ; 1♂, 1♀, same data as preceding, INPA . 1♂, “BRASIL, RR, Amajari \ Tepequém , SESC,\ 3º44'45"N –\ 61º43'40"W \ 1–15.iii.2016, R.\ Boldrini & J.Á. Rafael,\ arm. Malaise” .

Holotype condition. Body covered with sparse Lepidopteran scales.

Remarks. Freytag (2008) provided illustrations of the male genital capsule (lateral view), subgenital plate (ventral view), connective, style and aedeagus (ventral view) of B. ornatus . However, based on study of the holotype, his illustrations of the median process of the pygofer and anal tube are inaccurate. In the holotype, the pygofer process is long and somewhat straight, except at the apex, where it bends ventrally; also the apex is not bifurcate, but multifurcate, somewhat asymmetrically, with the right process ending in four tooth-like processes, while the left one has three (similar to what is illustrated in Figs. 16C–E ). Specimens vary in the hind tibia AD row with 5–6 cucullate setae and PD row with 12–15 cucullate setae.

Barolineocerus ornatus shares affinities with B. chiasmus , B. furcatus , B. ornatus , B. dercyae sp. nov., B. chicomendesi sp. nov., and B. digitatus sp. nov. as mentioned earlier. It is particularly similar to B. chiasmus , B. chicomendesi sp. nov., and B. digitatus sp. nov., differing in having the pygofer processes multifurcate ( Figs. 16C–E ).

Figures

FIGURE 16. Barolineocerus ornatus Freytag, 2008, male from Brazil, Amazonas, DZRJ. A, forewing. B, apodemes of sternite II, dorsal view. C, pygofer and anal tube, lateral view. D, pygofer process apex in detail, posterior view. E, pygofer and anal tube, posterior view. F, valve, ventral view. G, subgenital plate, lateral view. H, subgenital plate, ventral view. I, connective and style, dorsal view. J, connective, lateral view. K, style, lateral view. L, aedeagus, lateral view. M, aedeagus, posterior view. Scale bars: A= 1.0 mm, B–M= 0.2 mm.