Guaricicana, Domahovski & Cavichioli, 2019

Domahovski, Alexandre C. & Cavichioli, Rodney R., 2019, Guaricicana, a new genus of Hyalojassini (Hemiptera: Cicadellidae: Iassinae) from the Brazilian Atlantic Forest, European Journal of Taxonomy 547, pp. 1-12 : 3-8

Genus Guaricicana gen. nov.

urn:lsid:zoobank.org:act:6788EF71-4E7F-4915-ADA3-A2A5AF335714

Figs 1–29

Type species

Guaricicana borgesi gen. et sp. nov.

Diagnosis

Head ( Figs 1–3 ) wider than pronotum; head surface with transverse parallel striae on crown, anterior margin and frons; crown-face transition rounded. Forewing ( Fig. 4 ) with vein separating appendix and first apical cell complete; appendix and first apical cell having the same texture as rest of forewing. First hind tarsomere ( Fig. 9 ) with inner row formed by cucullate setae. Pygofer ( Fig. 12 ) with basal process on ventral margin. Subgenital plate ( Figs 12, 15 ) long, reaching pygofer apical third, but fully covered by sternite VIII. Connective ( Fig. 16 ) present, T-shaped. In dorsal view, style ( Fig. 17 ) elongated, without lateral lobes. Aedeagus ( Figs 19–20 ) shaft very long. Female first valvula ( Figs 23–24 ) with dorsal sculpturing imbricate; ventral margin near apex and apex with sculpturing areolate. Second valvula ( Figs 25–26 ) lacking prominent widely spaced teeth; apical fifth with irregular rounded teeth on dorsal margin and some small teeth on ventral margin near apex.

Etymology

The generic name Guaricicana (feminine noum), refers to the Reserva Particular do Patrimônio Natural da Guaricica, of the Sociedade em Pesquisa da Vida Selvagem e Educação Ambiental (SPVS), municipality of Antonina, state of Paraná, where the majority of the type-material was collected. The suffix -ana is common for other generic names of Iassinae .

Description

MEASUREMENTS. Body length: male 5.8–6.1 mm; female 6.4–6.6 mm.

BODY. Small to medium-sized leafhoppers, slightly depressed dorsoventraly and moderately elongated.

HEAD ( Figs 1–3 ). Dorsal view: wider than pronotum; not produced anteriorly, median length of crown onetenth interocular width; anterior and posterior margins parallel, broadly rounded; surface with transverse parallel striae; ocelli not visible dorsally; ventral view: face ca twice as wide as high; ocelli small, on anterior margin, mesad antennal pits; antennal ledge closer to anterodorsal than to anteroventral corner of eye, carinate and slightly oblique, not concealing antennal base; frons strongly broader dorsally, with transverse striae, distance between lateral margin of frons and eye internal margin subequal to maximum clypeus width; frontogenal suture not surpassing antennal ledges; gena broader than high, ventral margin excavate below eye internal margin and not completely concealing proepisternum; epistomal suture distinct and complete; clypeus as long as wide, lateral margins approximately straight and convergent apically, apical margin rounded; lateral view: crown slightly concave; crown-face transition rounded, with transverse striae; frons slightly convex; clypeus slightly inflated.

PRONOTUM ( Fig. 1 ). Surface transversely striated except near anterior margin, anterior margin broadly rounded and produced anterad of eyes medially, lateral margins carinate and shorter than eye length, almost parallel; posterior margin slightly excavated; laterally ( Fig. 3 ) slightly declivous; head and pronotum in continuous slope.

MESONOTUM ( FIG. 1 ). Slightly wider than long; mesonotum rugulose; scutellum with inconspicuous transverse striae.

FOREWING ( Fig. 4 ). Venation distinct; small setae present laterally to the veins; three closed anteapical and five apical cells present; vein separating appendix and first apical cell complete; appendix and first apical cell having the same texture as rest of forewing; appendix developed, bordering first and second apical cells. Hind wing ( Fig. 5 ) with R4+5 and M1+2 veins fused apically.

LEGS. Profemur ( Fig. 6 ) three times longer than high; AD, AM and PD rows reduced with exception of apical setae AD1, AM1 and PD1, respectively; intercalary group formed by short and irregular double row of setae continuous with AV row; AV row formed by six thicker and longer setae; PV row composed by thin, long setae; protibia ( Fig. 6 ) circular-shaped in cross section; AV row formed by very short setae in basal half, apical half with five longer and thicker setae toward apex; AD row undifferentiated; PD row formed by three longer and thicker setae and short, thin intercalary setae; PV row formed by approximately ten short setae; metafemur ( Fig. 7 ) with setal formula 2:2:1; metatibia ( Fig. 8 ) rows PD, AD, and AV with 15–16, 10–11, and 12–13 macrosetae, respectively; PV row beginning on median third, setae of median third homogeneous in length, setae of apical third alternating short and long setae and ending in two short setae; first tarsomere ( Fig. 9 ) with inner row formed by five-six thick cucullate setae, pecten with four platellae flanked by tapered lateral setae; second tarsomere ( Fig. 9 ) shorter than half of first tarsomere length, pecten with two apical platellae, flanked by tapered lateral setae.

MALE TERMINALIA. Sternite VIII ( Fig. 10 ) triangular, strongly produced posterad and fully hiding subgenital plates. Pygofer ( Fig. 12 ) with basal process on ventral margin. Subgenital plate ( Figs 12, 15 ) long, reaching pygofer apical third. Connective ( Fig. 16 ) present, T-shaped. In dorsal view, style ( Fig. 17 ) elongated, without lateral lobes. Aedeagus ( Figs 19–20 ) shaft long.

FEMALE TERMINALIA. Pygofer ( Fig. 22 ) with numerous macrosetae except on anterodorsal portion. Valvulae ( Figs 23, 25 ) slender, not surpassing pygofer apex, curved dorsally. First valvula ( Figs 23–24 ) with dorsal sculpturing imbricate, starting at midlength to near apex; apical portion ( Fig. 24 ) with ventral margin near apex and apex with sculpturing areolate, apex gradually tapered. Second valvula ( Figs 25–26 ) apical fifth with irregular rounded teeth on dorsal margin and some small teeth on ventral margin near apex. Gonoplac ( Fig. 27 ) higher at midlength; dorsal margin straight; ventral margin slightly rounded with few and sparse setae except on apical portion; apex rounded.

Distribution

Brazil (Paraná and Rio de Janeiro).

Remarks

The new genus is placed within Hyalojassini in having the head with the transition crown to face rounded in profile; the ocelli on anterior margin not visible in dorsal view; the hind wing with R4+5 and M1+2 veins fused apically; and the sternite VIII of male fully hiding the subgenital plates. Guaricicana gen. nov. is very similar to Daveyoungana Blocker & Webb, 1992 in the body shape, slightly depressed dorsoventrally and moderately elongated; the position of the black spots of the head and the pronotum; the head wider than pronotum; the fore wing with a vein separating the appendix and the first apical cell complete, and the appendix and the first apical cell with the same texture as the remainder of the fore wing; the chaetotaxy of the legs, except for the first hind tarsomere; the pygofer with a well sclerotized basal portion, forming a ring dorsally, the presence of a basal process on the ventral margin and the lateral lobes with many macrosetae, articulated with the base by flexible membranous clefts; the large T-shaped connective; the style with an elongated apophysis; the aedeagus shaft elongated; and the female first valvula with an imbricate dorsal sculpturing and a ventral margin and apex with sculpturing areolate.

However, Daveyoungana can easily be separated from Guaricicana gen nov. by the coloration of the forewing with a yellow costal margin; the first hind tarsomere with a row of simple (non-cucullate) setae on the ventral surface; a short subgenital plate, approximately as long as wide; the connective with a longer stalk; the style with lateral lobes; and the female second valvula with three prominent widely spaced teeth in the distal half.

Figures

Figs 1–9. Guaricicana borgesi gen. et sp. nov., holotype, ♂ (DZUP 215374). External morphology. 1. Head and thorax, dorsal view. 2. Head and thorax, ventral view. 3. Head and thorax, lateral view. 4. Fore wing. 5. Hind wing. 6. Fore leg, anterior view. 7. Hind femur, anterior view. 8. Hind tibia, anterior view. 9. Hind tarsus, ventral view. Scale bars: 1–7 = 1.0 mm; 8–9 = 0.5 mm.

Figs 10–20. Guaricicana borgesi gen. et sp. nov., holotype, ♂ (DZUP 215374), terminalia. 10. Sternite VIII, ventral view. 11. Pygofer, dorsal view. 12. Pygofer and subgenital plate, lateral view. 13. Ventral process of pygofer, lateral view. 14. Ventral process of pygofer, ventral view. 15. Subgenital plate, ventral view. 16. Connective, dorsal view. 17. Style, dorsal view. 18. Style, lateral view. 19. Aedeagus, lateral view. 20. Aedeagus, ventral view. Scale bars: 10–12, 15, 17–18 = 0.5 mm; 13–14, 16, 19–20 = 0.25 mm.

Figs 21–27. Guaricicana borgesi gen. et sp. nov., paratype, ♀ (DZUP 215378), terminalia. 21. Sternite VII, ventral view. 22. Pygofer, lateral view. 23. First valvifer and first valvula, lateral view. 24. Apex of first valvula, lateral view. 25. Second valvula, lateral view. 26. Apex of second valvula, lateral view. 27. Gonoplac, lateral view. Scale bars = 0.5 mm; 24, 26 = not to scale.

Figs 28–29. Guaricicana borgesi gen. et sp. nov., holotype, ♂ (DZUP 215374). 28. Dorsal habitus. 29. Lateral habitus. Scale bars = 1 mm.