Gehundra cristalinensis, Domahovski, 2021

Domahovski, Alexandre C., 2021, Two new species of Hyalojassini (Hemiptera: Cicadellidae: Iassinae) to the genera Comanopa Blocker and Gehundra Blocker, description of the male of G. sordida (Baker) and key to species, European Journal of Taxonomy 746 (1), pp. 112-129 : 118-122

Gehundra cristalinensis sp. nov.

urn:lsid:zoobank.org:act:25FBE065-ECF1-4D42-9AF4-A82F25D83058

Figs 13–31

Diagnosis

Male pygofer ( Figs 17–19 ) ventral margin with long thin setae on apical half. Subgenital plate ( Figs 17– 20 ) with external margin rounded, almost circular; apex deeply notched, pseudostyle acute, with few short setae. Style ( Fig. 21 ) approximately straight; apex slightly tapered and curved dorsally.

Etymology

The new species name refers to the locality (Parque Estadual do Cristalino) where the type series was collected.

Material examined

Holotype BRAZIL • ♂; “ Brasil, MT [Mato Grosso], Novo Mundo , Pq. [Parque]\ Est. [Estadual] do Cristalino , 09.4517ºS, \ 55.8396ºW, 240m, light trap, \ 21-25.vi.2017, RR Cavichioli \ & AC Domahovski ”; DZUP 215443 .

Paratypes BRAZIL • 5 ♂♂, 4 ♀♀; same collection data as for holotype; DZUP 215444 to 215452 • 1 ♂, 1 ♀; same collection data as for holotype; DZRJ • 1 ♀; “ Brasil , MT, Novo Mundo, \ Pq. Est. do Cristalino , \ 09.4517ºS 55.8396ºW,\ 240m, luminárias - aloja \mento AC Domahovski”; DZUP 215453 .

Description

Male

MEASUREMENTS (mm). Holotype (♂) total length 4.7. Paratypes (♂) 4.6–4.8; (♀) 4.8–5.0.

BODY. Small and ovate leafhoppers, not depressed dorsoventrally.

HEAD ( Figs 13–15 ). Dorsal view: very short, transocular width nine-tenths humeral width of pronotum; crown not developed, vertical, surface whit transverse striae; anterior and posterior margins parallel and broadly rounded; ocelli not visible dorsally; lateral view: crown-face transition broadly rounded with transverse striae; frons and clypeus slightly inflated; ventral view: face more than two times wider than high; ocelli small, on anterior margin, mesad of antennal pits and distant from eyes; frons with transverse striae, lateral margins strongly convergent ventrally; frontogenal suture surpassing antennal ledge, extending to anterior margin of crown; antennal ledge carinate and slightly oblique, not concealing antennal base; antenna length ca ⅓ width of head; gena broad, with small setae; ventrolateral margin broadly rounded, completely concealing proepisternum; maxillary plate produced ventrally as far as clypeus apex; lorum with few short setae, narrower than clypeus width, subgenal suture rounded, extended nearly to midlength of lateral margin of frons; clypeus slightly shorter than basal width, epistomal suture complete and rounded, lateral margins excavated medially, apex slightly broadened, rounded and carinated.

PRONOTUM ( Figs 13–14 ). Dorsal view: anterior margin broadly rounded, posterior margin slightly excavated; surface without setae, with transverse striae, except on anterior third; lateral margins convergent anterad, carinate, slightly shorter than eye length; lateral view: convex and declivous anterad.

MESONOTUM AND SCUTELLUM ( Fig. 13 ). Dorsal view: longer than pronotum length; surface with transverse striae, except lateral angles with texture shagreen; scutellum flat.

FOREWING ( Figs 13–14 ). With many small erect setae, venation obscure; clavus truncate apically; vein separating appendix and first apical cell complete (not evanescent apically), appendix and first apical cell broad, more membranous than adjacent cells, glabrous; 3 closed anteapical cells and 4 apical cells (2 nd, 3 rd and 4 th cells short; R1 vein absent).

HIND WING. Veins R4+5 and M1+2 fused apically.

LEGS. Profemur moderately elongated, 2.9 times longer than high; PD, AD and AM rows formed by undifferentiated setae, PD1 and AD1 setae short and AM1 absent; IC row formed by double row of fine setae, continuous with AV row; AV and PV rows formed by several fine setae. Protibia, in cross-section, almost circular, without defined longitudinal carina adjacent to PD row; AV row formed by short, thin setae in the basal half and slightly more robust setae distally; AD row consisting of only undifferentiated setae; PD row formed by with 3–4 long setae intercaled by undifferentiated setae; PV row with 6–7 short setae. Hind leg with femoral setal formula 2:2:1 or 2:2:1:1; PD2 seta reduced in size; metatibia PD, AD and AV rows with 14–19, 9–11 and 10–12 macrosetae respectively; AD row without intercalary setae between macrosetae; PV row with setae of apical half intercalating 1 longer and thicker seta and 3–4 shorter and thinner setae, ending with 3 thin setae; first tarsomere without enlarged dorsoapical seta; ventral surface with two longitudinal rows of simple (non-cucullate) thin setae; pecten with 4 platellae flanked by tapered lateral setae; second tarsomere pecten with 2 platellae flanked by tapered lateral setae.

COLORATION. Head and thorax ( Figs 13–15 ) brownish-yellow. Face ( Fig. 15 ) with muscle impressions of frons brown; lorum with ventral half brown. Pronotum ( Fig. 13 ) with irregular brown markings near anterior margin. Mesonotum ( Fig. 13 ) with lateral angles dark brown. Forewing ( Figs 13–14 ) with brown setae and groups of black setae at midlength of anal margin, apex of clavus and apex of inner discal cell (variable in intensity between the specimens).

TERMINALIA. Sternite VIII ( Fig. 16 ) convex, strongly produced posterad, two times longer than wide, longer than sternites VII and VI combined; ventral surface with many small setae, except basal portion and along median line; lateral margins tapered toward apex, with small rounded lobe at basal third; apex subacute. Valve ( Figs 17–18 ) longer than wide, broadly fused laterally to pygofer; lateral margins convergent toward ventral margin, with strong integument thickening; ventral margin rounded. In lateral view, pygofer ( Figs 17–18 ) without processes, higher near base; dorsal margin deeply notched after half its length; dorsoposterior margin fused to pygofer lobes, straight and oblique; ventral margin approximately straight, with short setae near base and long thin setae on apical half; lateral surface with longitudinal carina near ventral margin of basal ⅔; apex very wide and truncated; without macrosetae, but with few short setae near apex. In ventral view, pygofer ( Fig. 19 ) with ventral margin folded inward, from base to apex, with short setae on inner surface. Anal tube ( Fig. 17 ) membranous, without processes. Subgenital plate ( Figs 17–20 ) short, with well developed pseudostyle; inner margin nearly straight; external margin rounded, almost circular, overlapping pygofer laterally; apex deeply notched, pseudostyle acute, with few short setae. Connective amorphous. Style ( Figs 17, 21 ) long, approximately straight, apodeme and apophysis long, subequal in length; apex slightly tapered and curved dorsally. Aedeagus ( Figs 22–23 ), with preatrium not developed; dorsal apodeme developed, with lateral margins extended laterad and posterior margin extending to almost apex of shaft; shaft slightly curved dorsally; dorsal margin rounded near base and straight distally; ventral margin broadly rounded. In ventral view, aedeagus ( Fig. 23 ) with shaft apex bifid; gonopore subapical.

Female TERMINALIA. Sternite VII ( Figs 24–25 ) ca two times wider than long; ventral surface with short setae; posterior margin deeply excavated, V-shaped. Internal sternite VIII membranous. Pygofer ( Figs 24, 26 ) with many thin setae; ventral margin broadly rounded with group of thick setae at base; apex obliquely truncated. Ovipositor slender, evenly curved dorsad, not surpassing pygofer apex. First valvifer ( Fig. 27 ) trapezoid, approximately as long as wide; anterior margins of both valvifers connected by sclerotized membrane. First valvula ( Fig. 27 ) with dorsal and ventral margins almost parallel, slightly convergent apically, ca 7 times longer than high at base; ventral interlocking device long, extending over basal ⅔; dorsal sculptured area areolate starting before the midlength; apical portion ( Fig. 28 ) with ventral sculpture present only near apex, continuous with the dorsal sculpture, apex moderately tapered and acute. Second valvifer ( Fig. 31 ) ca three times higher than long. Second valvula ( Fig. 29 ) ca 10 times longer than high; dorsal and ventral margins parallel; dorsal margin with three distinct subapical teeth widely spaced; apical portion ( Fig. 30 ) of dorsal margin with two rounded subapical notches forming one rounded tooth between apex and first subapical tooth; ventral margin without denticles and with one subapical tooth. Gonoplac ( Fig. 31 ) four times longer than high; dorsoapical margin long, half length of gonoplac; external surface without dentiform cuticular projections; ventral margin broadly rounded, with few spaced macrosetae near ventral margin; apex rounded.

Remarks

Gehundra cristalinensis sp. nov. is most similar to G. avulsa in having the male pygofer with ventral margin bearing long setae on apical half and the subgenital plate deeply notched apically. However, the new species can easily by separated by the subgenital plate ( Fig. 20 ) with external margin rounded, almost circular (less expanded laterally and not circular in G. avulsa ) and the style ( Fig. 21 ) approximately straight, with apex slightly tapered (style with apophysis more curved, with apex footshaped in G. avulsa ).

Figures

Figs 13–23. Gehundra cristalinensis sp. nov., holotype, ♂ (DZUP 215443). 13. Habitus, dorsal view. 14. Habitus, lateral view. 15. Head, ventral view. 16. Sternite VIII, ventral view. 17. Genital capsule, lateral view. 18. Pygofer, valve and subgenital plate, lateral view. 19. Pygofer, valve and subgenital plate, ventral view. 20. Subgenital plate, ventral view. 21. Style, lateral view. 22. Aedeagus, lateral view. 23. Aedeagus, ventral view. Scale bars in mm.

Figs 24–31. Gehundra cristalinensis sp. nov., paratype, ♀ (DZUP 215451). 24. Apical portion of abdomen, ventral view. 25. Apical portion of abdomen, lateral view. 26. Enlarged view of basal portion of pygofer. 27. First valvifer and first valvula, lateral view. 28. Apical portion of first valvula. 29. Second valvula, lateral view. 30. Apical portion of second valvula. 31. Second valvifer and gonoplac, lateral view. Scale bars in mm.