Barolineocerus, 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 : 457

Key to males of Barolineocerus

1. Forewing claval maculae extended well beyond scutellum apex (Figs. 1I, P, 3A, D, 4A, G)........................... 2

1’ Forewing claval maculae extended to or slightly beyond scutellum apex (Figs. 1A, E, M, P, 2A, D, G, 3G, 4D, J)......... 5

2(1). Pygofer posterior median process with apex simple, not divided ( Figs. 10C–D , 11C–D , 13C–D )....................... 3

2’ Pygofer posterior median process with apex multifurcate ( Figs. 16C–E )....................... B. ornatus Freytag, 2008

3(2) Pygofer posterior median process long and sinuous ( Figs. 10C–D , 13C–D ), subgenital plate apex parallel ( Figs. 10F–G , 13F– G )................................................................................................. 4

3’ Pygofer posterior median process short and curved ( Figs. 11C–D ), subgenital plate apex strongly dorsally curved ( Figs. 11F– G ).............................................................................. B. chicomendesi sp. nov.

4(3) Pygofer posterior median process apex straight ( Figs. 10C–D ); valve posterior margin distinctly posteriorly projected ( Fig. 10E ); anal tube laterobasal process with base and apex angulate on anterior margin ( Figs. 10C–D )..................................................................................................... B. chiasmus Freytag, 2008

4’ Pygofer posterior median process apex hook-shaped ( Fig. 13D ); valve posterior margin convex ( Fig. 13E ); anal tube laterobasal process with base sinuous on anterior margin and apex distinctly pointed ( Figs. 13C–D ).............. B. digitatus sp. nov.

5(1) Pygofer posterior margin with distinct short median process ( Figs. 12C–E , Figs. 15C–E )............................. 6

5’ Pygofer posterior margin without median process ( Figs. 5C–D , 7C–D , 8C–D , 14C–D , 17C–D )........................ 8

6 (5) Abdominal sternite II apodeme surpassing posterior margin of sternite III ( Figs. 12B , 15B ); subgenital plate without a dorsal preapical spine-like process ( Figs. 12G , 15G ).............................................................. 7

6’ Abdominal sternite II apodeme not reaching posterior margin of sternite III ( Fig. 17B ); subgenital plate with a dorsal preapical spine-like process ( Figs. 17F–G )..................................................... B. spinosus Freytag, 2008

7(6) Pygofer median process bifurcate and pointed ( Figs. 15C–E ); subgenital plate with apex bluntly pointed ( Fig. 15G )........................................................................................ B. furcatus Freytag, 2008

7’ Pygofer median process expanded apically with single spine-like process apically ( Figs. 12C–E ); subgenital plate with apex rounded ( Fig. 12G )...................................................................... B. dercyae sp. nov.

8(5) Aedeagus without ventral transverse ridge, but with paired preapical processes ( Figs. 5L–N , 8K–M )................... 9

8’ Aedeagus with ventral ridge, but without paired preapical processes ( Figs. 7K–M , 14K–M , 17L–N ).................. 10

9(8) Pygofer posterior margin with short ventral process ( Fig. 5E ); aedeagus with dorsal median spine-like process ( Fig. 5L )....................................................................................... B. acius Freytag, 2008

9’ Pygofer posterior margin without short ventral process ( Fig. 8D ); aedeagus without dorsal median process ( Fig. 8K )....................................................................................... B. bispinus Freytag, 2008

10(8) Valve with anterior margin straight ( Fig. 7E ); pygofer anterodorsal apodeme shorter than half length of pygofer ( Fig. 7C ); aedeagus ventral transverse ridge at apical third of shaft ( Figs. 7K–M )........................ B. apiculus Freytag, 2008

10’ Valve with anterior margin sinuous ( Fig. 14E ); pygofer anterodorsal apodeme longer than half length of pygofer ( Fig. 14C ); aedeagus ventral transverse ridge at median third of shaft ( Figs. 14K–M )..................... B. elongatus Freytag, 2008

Figures

FIGURE 5. Barolineocerus acius Freytag, 2008, male from Brazil, Amazonas, DZRJ. A, forewing. B, hindwing. C, apodemes of sternite II, dorsal view. D, pygofer and anal tube, lateral 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. N, aedeagus shaft in detail, posterior view. ADS: aedeagal dorsal median spine; AP: apodeme; Pr: process; PVP: pygofer ventral process. Scale bars: A–B= 1.0 mm, C–M= 0.2 mm, N= 0.1 mm.

FIGURE 7. Barolineocerus apiculus 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 and anal tube, posterior view. E, valve, ventral view. F, subgenital plate, lateral view. G, subgenital plate, ventral view. H, connective and style, dorsal view. I, connective, lateral view. J, style, lateral view. K, aedeagus, lateral view. L, aedeagus, posterior view. M, aedeagus shaft in detail, posterior view. ADS: aedeagal dorsal median spine. Scale bars: A= 1.0 mm, B–L= 0.2 mm, M= 0.1 mm.

FIGURE 8. Barolineocerus bispinus 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 and anal tube, posterior view. E, valve, ventral view. F, subgenital plate, lateral view. G, subgenital plate, ventral view. H, connective and style, dorsal view. I, connective, lateral view. J, style, lateral view. K, aedeagus, lateral view. L, aedeagus, posterior view. M, aedeagus shaft in detail, posterior view. Scale bars: A= 1.0 mm, B–L= 0.2 mm, M= 0.1 mm.

FIGURE 10. Barolineocerus chiasmus Freytag, 2008, male from French Guiana, Régina, MNHN.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, ventral view. H, connective and style, dorsal view. I, connective, lateral view. J, style, lateral view. K, aedeagus, lateral view. L, aedeagus, posterior view. ADS: aedeagal dorsal median spine. Scale bars: A= 1.0 mm, B–L= 0.2 mm.

FIGURE 11. Barolineocerus chicomendesi sp. nov., male from Brazil, Amazonas, 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, ventral view. H, connective and style, dorsal view. I, connective, lateral view. J, style, lateral view. K, aedeagus, lateral view. L, aedeagus, posterior view. ADS: aedeagal dorsal median spine. Scale bars: A= 1.0 mm, B–L= 0.2 mm.

FIGURE 12. Barolineocerus dercyae sp. nov., male from Brazil, Amazonas, 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, pygofer process apex in detail, 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. N, aedeagus apex in detail, posterior view. ADS: aedeagal dorsal median spine. Scale bars: A= 1.0 mm, B–M= 0.2 mm, N= 0.1 mm.

FIGURE 13. Barolineocerus digitatus sp. nov., male from Brazil, Amapá, 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, ventral view. H, connective and style, dorsal view. I, connective, lateral view. J, style, lateral view. K, aedeagus, lateral view. L, aedeagus, posterior view. M, aedeagus shaft in detail, posterior view. ADS: aedeagal dorsal median spine. Scale bars: A= 1.0 mm, B–G= 0.2 mm, H–M= 0.1 mm.

FIGURE 14. Barolineocerus elongatus Freytag, 2008, male from Brazil, Amazonas, 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, ventral view. H, connective and style, dorsal view. I, connective, lateral view. J, style, lateral view. K, aedeagus, lateral view. L, aedeagus, posterior view. M, aedeagus shaft in detail, posterior view. ADS: aedeagal dorsal median spine. Scale bars: A= 1.0 mm, B–L= 0.2 mm, M= 0.1 mm.

FIGURE 15. Barolineocerus furcatus Freytag, 2008, male from Brazil, Rondônia, FSCA. A, forewing. B, apodemes of sternite II, dorsal view. C, pygofer and anal tube, lateral view. D, pygofer and anal tube, posterior view. E, pygofer process apex in detail, 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. N, aedeagus apex in detail, posterior view. ADS: aedeagal dorsal median spine. Scale bars: A= 1.0 mm, B–D= 0.5 mm, E–N= 0.2mm.

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.

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.