Barolineocerus spinosus 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 : 482

Barolineocerus spinosus Freytag, 2008

( Figs. 4J–L , 17A–N )

Barolineocerus spinosus Freytag, 2008: 55 , figures 23–25.

Type locality: Amacayacu National Park , Matamata Station, Amazonas, Colombia .

Diagnosis (based on material collected in Brazil). Pronotal macula almost extends to hind margin of pronotum ( Fig. 4J ). Claval macula extends to scutellum apex ( Fig. 4J ). Abdominal sternite II apodeme extending almost to posterior margin of sternite III ( Fig. 17B ). Pygofer posterior margin with short ventral process; with short median process, not forming elongate process ( Figs. 17C–D ). Valve anterior and posterior margins sinuous ( Fig. 17E ). Subgenital plate with dorsal spine-like preapical process posteriorly projected; apex pointed ( Figs. 17F–H ). Aedeagus without dorsal median process; without dorsal subapical ridge; with ventral transverse ridge at apical fifth ( Figs. 17L–N ). Anal tube, laterobasal process with base sinuous at anterior margin, apex distinctly pointed ( Figs. 17C, E ).

Measurements (mm). Males (n= 3), total length (to apex of forewing): 4.94–5.17; median length of crown: 0.22–0.29; length of crown close to eyes: 0.18–0.26; width of head: 1.78–1.88; width of crown between eyes: 1.06–1.18; length of pronotum: 0.48–0.54; length of scutellum: 0.96–1.19; width of pronotum: 1.68–1.81; width of scutellum: 1.21–1.42; length of face: 1.12–1.17; width of face between eyes: 1.01–1.11; distance between ocelli: 0.33–0.36; ocellocular distance: 0.28–0.35; length of clypeus: 0.39–0.42; basal width of clypeus: 0.25–0.27; apical width of clypeus: 0.33–0.37; length of forewing: 4.42–4.44.

Distribution. Brazil (Acre, Amazonas); Colombia (Amazonas).

Additional material. Brazil: 2♂, “BRASIL, Acre, Bujari, FES [Floresta Estadual] Antimary\ 9°20'01"S – 68°19'17"W, 21.x–04.xi.\ 2016, Malaise grande, E.F. Morato \ & J.A. Rafael cols—Rede BIA”, INPA ; 1♂, “BRASIL, AM [Amazonas], Careiro Castanho \ BR-319 km-181, Sítio S. [São] Paulo \ 4°12'48"S –60°49'04'W\ 13–17.vii.2016, Malaise gde [grande]\ J.A. Rafael & F.F. Xavier Fº”, DZRJ ; same data as preceding, except: “ 15– 30.ix.2016, Malaise\ Grande, J.A. Rafael &\ F.F. Xavier Fº”. MATERIAL DO PARÁ

Remarks. Freytag (2008) provided illustrations of the male genital capsule (lateral view), subgenital plate (ventral view), connective, style and aedeagus (ventral view) of B. spinosus While Freytag (2008) states that ventral spines are present near the apex of the aedeagal shaft, in the studied Brazilian material, this projection is a transverse ridge rather than a spine-like process ( Figs. 17L–N ). In some specimens, the apical yellow portion of the scutellum is discontinuous from the remaining portions of the posterolateral macula (as in Fig. 4J ). Specimens vary in the hind tibia AD row with 6–7 cucullate setae and PD row with 16–19 cucullate setae.

Barolineocerus spinosus is most similar to B. apiculus and B. elongatus as noted in the Remarks on B. apiculus . However, it can be distinguished from these species by the apodeme of abdominal sternite II not reaching the posterior margin of sternite III ( Fig. 17B ), pygofer posterior margin with median process projected as far as ventral one ( Fig. 17D ), and a preapical spine-like process on the dorsal margin of the subgenital plate ( Figs. 17F–G ).

Figures

FIGURE 4. Barolineocerus habitus. A, D, G, dorsal habitus. B, E, H, lateral habitus. C, F, I, face, ventral view. A–C, Barolineocerus digitatus sp. nov. specimen from Brazil, Amapá. D–F, Barolineocerus elongatus Freytag, 2008 specimen from Brazil, Amazonas. G–I, Barolineocerus ornatus Freytag, 2008 specimen from Brazil, Roraima. J–L, Barolineocerus spinosus Freytag, 2008 specimen from Brazil, Acre. Scale bars: A–B, D–E, G–H, J–K= 1.0 mm; C, F, I, L: 0.5 mm.

FIGURE 17. Barolineocerus spinosus Freytag, 2008, male from Brazil, Acre, INPA. A, forewing. B, apodemes of sternite II, dorsal view. C, pygofer and anal tube, lateral view. D, pygofer and anal tube, posterior view. E, valve, ventral view. F, subgenital plate, lateral view. G, subgenital plate apex in detail, lateral view. H, subgenital plate, ventral view. I, connective and style, dorsal view. J, connective, lateral view. K, style, lateral view. L, aedeagus, posterior view. M, aedeagus, lateral view. N, aedeagus apex in detail, posterior view. PMP: pygofer median process. PVP: pygofer ventral process. Scale bars: A= 1.0 mm, B–M= 0.2 mm, N= 0.1 mm.