Barbaropus, Xu & Qin & Dietrich, 2019

Xu, Ye, Qin, Dao-Zheng & Dietrich, Christopher H., 2019, A new genus and species, Barbaropus flatus, from Ecuador with notes on Empoascini (Hemiptera: Cicadellidae: Typhlocybinae), Zootaxa 4608 (2), pp. 396-400 : 397-398

Barbaropus gen. nov.

Type species: Barbaropus flatus sp. nov., here designated.

Description. Body slim ( Figs 1, 2 ). Head including eye in dorsal view broader than maximum width of pronotum ( Figs 1, 3 ). Crown angulately produced in dorsal view, transition to face rounded in profile ( Figs 1–3 ). Coronal suture short, not reaching anterior margin ( Figs 1, 3 ). Eye large, distance between bases of eyes equal to eye width ( Figs 1, 3 ). Ocelli absent ( Fig. 4 ). Face broad, longer than wide in anterior view, frontal sutures present but short, extended half way from antennal pits to dorsal margin of face; anteclypeus weakly convex, elliptical, not swollen; lorum obsolete; rosturm not extended to hind coxae ( Figs 2, 4 ). Pronotum large ( Figs 1, 3 ).

Forewing narrow, rounded apically, apical cells occupying nearly one-fourth of total length, c cell almost equal to m cell in width, both wider than r and cua cells; vein RP arising from r cell , MP' and MP''+CuA' dissociated at their bases, both arising from m cell ( Fig. 8 ). Hind wing with anal vein separating from vein AP' and vein AA near base; submarginal vein extending to wing apex and confluent with apex of vein R+MP'; vein CuA unbranched apically; vein CuP confluent with ambient vein near midlength of wing ( Fig. 9 ).

Front femur seta AM1 long and stout, situated on ventral margin; intercalary row with 3 large basal setae and 10–13 relatively short, fine setae more distad, extended nearly half length of femur; row PV with 5 long, fine setae in basal half. Middle femur with 2 dorsoapical macrosetae. Hind femur with macrosetal formula 2+1, tibia row AV with 4 preapical macrosetae; tarsus elongate, approximately one-half length of tibia, tarsomere I longer than tarsomeres II and III combined.

Male basal abdominal sternal apodemes (2S apodemes) weakly developed; 4S apodemes present but small in some specimens. Posterior margin of sternite VIII emarginate medially ( Fig. 7 ). Male pygofer large, base with dorsal membranous cleft V-shaped and extended to anterior margin; distal lobe separated from base by deep vertical cleft, without setae; ventral appendage present, arising from horizontal sclerotized ridge extended across middle of lobe, free in distal third, smooth, spinelike ( Figs 5, 6 , 10 ). Subgenital plates short, rectangular, not extending to pygofer apex; connected to each other at base; A-group setae slender, near base of plate, B-group setae small and rigid in small preapical patch; C-group reduced to two macrosetae in distal half; D-group setae absent ( Figs 5 , 10, 13 ). Paramere without preapical lobe or apical extension, with few microsetae arranged on narrowed curved subapex, without teeth or sculpture ( Figs 10, 14 ). Connective Y-shaped, caudal margin nearly straight ( Fig. 15 ). Aedeagus with preatrium not developed, atrium enlarged with pair of lateral processes and unpaired ventral process; dorsoatrium present, weakly sclerotized and articulated to base of anal tube ventrally; shaft tubular, denticulate; gonopore subapical on ventral surface ( Figs 5, 6 , 10–12 ). Anal tube large, broad, well sclerotized dorsally, tapered posteriorly; basolateral processes well developed, slender, extended posteroventrad ( Figs 5 , 10, 16 ). Ninth sternite broadly fused to pygofer, wider than long, caudal margin and anterior margin almost parallel in ventral view ( Figs 5, 6 , 10, 13 ).

Etymology. The generic name, a masculine noun, is derived from Latin word " barbar ", alluding to special shape of aedeagus.

Notes. This new genus superficially resembles Beamerana and Paulomanus in the absence of ocelli, the obsolete lorum, absence of setae on the pygofer lobe and presence of a ventral pygofer appendage. However, it differs from both in the structure of the subgenital plate, which is very short and broad, and the aedeagus, which has long basal processes.

These three genera form a distinctive group sharing the following characteristics: small to medium sized, usually with bright reddish symmetrical color pattern; head with crown slightly produced medially, ocelli absent, lorum not delimited, middle femur with 2 dorsoapical macrosetae, hind femur with macrosetal formula 2+1, tibia row AV with 4 preapical macrosetae, male basal abdominal sternal apodemes weakly developed, pygofer lobe without setae, and subgenital plate macrosetae reduced or absent. These traits distinguish this group from other Empoascini , which have the ocelli and lorum well developed and the subgenital plates with numerous macrosetae. The group may eventually be found to merit status as a separate tribe or subtribe but phylogenetic analyses are needed to elucidate the relationships of these and other Typhlocybinae. Some recently described genera from tropical Asia have hind wing venation similar to that of typical Empoascini but have been placed in Dikraneurini based on other characters ( Dietrich 2013b). Thus, the hind wing characters alone are not sufficient for diagnosing tribes of Typhlocybinae.

Distribution. Ecuador.

Figures

FIGURES 1–9. Barbaropus flatus sp. nov. 1. male adult (abdomen removed), dorsal view; 2. male adult (abdomen removed), left lateral view; 3. head and thorax, dorsal view; 4. face; 5. male genitalia, left lateral view; 6. male genitalia, dorsal view; 7, abdominal apodemes; 8. forewing; 9. hindwing.

FIGURES 10–16. Barbaropus flatus sp. nov. 10. male genitalia, left lateral view; 11. aedeagus, left lateral view; 12. aedeagus, ventral view; 13. subgenital plates and sternite IX; 14. paramere; 15. connective; 16. anal tube process, left lateral view.