Delongiana, Domahovski & Gonçalves & Takiya & Cavichioli, 2020

Domahovski, Alexandre Cruz, Gonçalves, Clayton Corrêa, Takiya, Daniela Maeda & Cavichioli, Rodney Ramiro, 2020, Description of two new species of Regalana and a new genus of Gyponini (Hemiptera: Cicadellidade: Iassinae), Zootaxa 4731 (1), pp. 89-102 : 94-95

Delongiana gen. nov.

( Figs 27 −64, 67−69)

Type species: Delongiana ramosa sp. nov.

Diagnosis. Small and ovate; brownish yellow leafhoppers with brown and black marking (Figs 67−69). Head ( Figs 27 , 40 ) in dorsal view, slightly produced; median length of crown slightly less than half interocular width. Crown transversely parallel striated. Crown-face transition (Figs 29, 42) distinct, thick and striated. Pygofer (Figs 33, 46) with an oblique integument thickening near dorsal margin. Connective (Figs 35, 48) Y-shaped. Subgenital plate (Figs 34, 47) very narrow and elongated. Style (Figs 36, 49) in lateral view, elongated, apex foot-shaped. Aedeagus (Figs 37−39, 50−52) with dorsal apodemes strongly developed; shaft cylindrical and curved dorsally, with processes near mid-length, without apical processes. Female with second valvula (Fig. 61) with prominent teeth on apical third.

Coloration. Head and thorax (Figs 67−69) brownish yellow with brown and black maculae. Crown ( Figs 27 , 40 ) with median black longitudinal stripe. Face (Figs 28, 41, 54) brownish yellow. Frons (Figs 28, 41) with black bands over muscle impressions. Lorum (Figs 28, 41) with black spot near clypeus margin. Gena (Figs 28, 41) with maculae adjacent to antennal pit and eye margin and at middle portion, black. Clypeus (Figs 28, 41) with median spot and paired lateral small spots over epistomal suture, black. Pronotum ( Figs 27 , 53 ) with irregular black spots near anterior margin and small light-brown punctures on disk; lateral lobe (Figs 29, 55) with anterior half black. Scutellum ( Figs 27 , 53 ) with lateral corners dark brown; longitudinal median stripe reaching transverse carina with two adjacent rounded spots, black. Forewing (Figs 30, 43) with small light and dark brown mottling; larger and darker maculae on costal margin, cross veins of discal cell, and apices of anal veins; appendix with two fuscous maculae: one at base and one near mid-portion. Legs brownish yellow with black maculae. Metatibia (Figs 42, 55) with cucullate bases of setae blacks.

Description. Length (male) 6.8−7.6mm; (female) 8.4−8.6mm. Crown ( Figs 27 , 40 ) in dorsal view, slightly pro- duced; median length slightly less than half interocular width; anterior margin broadly rounded and parallel to anterior margin of pronotum; surface slightly concave; texture with fine parallel transverse striations; transocular width of head 4 / 5 humeral width of pronotum; ocelli equidistant between median line and eyes; slightly closer to anterior margin of crown. Face (Figs 28, 41, 54) wider than long. Frontogenal suture (Figs 28, 41) distant from eye margins by half width of clypeus and surpassing antennal ledge, extending to anterior margin of crown. Antennal ledge (Figs 28, 41) carinated, in frontal view, obliquely downwards in relation to frons and extending over frons. Frons (Figs 28, 41) approximately 1.2 times longer than wide; in lateral view, slightly swollen and concave below anterior margin of crown. Epistomal suture (Figs 28, 41) distinct. Clypeus (Figs 28, 41) approximately 1.3 times longer than wide; lateral margins parallel; apex emarginated; not inflated. Maxillary plate (Figs 28, 41) produced ventrally as far as clypeus apex. Gena (Figs 28, 41) with ventrolateral margins slightly convex at mid-length. Crown-face transition (Figs 29, 42) defined; with five or six distinct transverse striae. Pronotum ( Figs 27 , 40 ), in dorsal view, with conspicuous transverse striae on disc and posterior third; lateral margins convergent anterad; in lateral view (Figs 29, 42) rounded and moderately declivous; head and pronotum in continuous slope. Scutellum (Figs 29, 42) wider than long; portion posterior to transverse carina (Figs 29, 42), in lateral view, slightly rounded, not inflated. Forewing (Figs 30, 43) without extra crossveins; venation distinct; appendix well developed and involving first and second apical cells, as wide as maximum width of first apical cell. Profemur, in frontal view, 3.5 times longer than high; AV and PV rows formed by 3 or 4 setae. Protibia more or less cylindrical, with a longitudinal carinae adjacent to PD row; AV row formed by long setae, gradually increasing in thickness and length towards apex; AD formed by many small undifferentiated setae; PD row with 4 long setae; PV row developed, with very small setae near base and 4 long setae on apical two thirds. Hind leg femoral setal formula 2:2:1; tibial rows PD, AD, and AV with 22–24, 11–12, and 13–15 macrosetae, respectively; AD row with intercalary setae between macrosetae and PV row with setae of apical half formed by sequence of 1 thicker and 3 thinner setae; first tarsomere with inner row developed and median row absent on plantar surface, apex with 4 platellae; second tarsomere apex with 2 apical platellae.

Male terminalia. Sternite VIII not covering subgenital plates. Valve (Figs 32, 45) slightly wider than long; integument thickening on anterior margin. Pygofer (Figs 33, 46) about two times longer than maximum height; with an oblique integument thickening near dorsal margin; macrosetae dispersed on apical half. Subgenital plate (Figs 34, 47) in ventral view, very narrow and elongated; five to six times longer than wide; wider at basal third and with fine setae near outer margin and apex. Connective (Figs 35, 48) Y-shaped. Style (Figs 35, 48) in dorsal view, with outer lobe developed; in lateral view (Figs 36, 49), elongated and enlarged towards apex; microsetae present on basal half of external surface; apex foot-shaped. Aedeagus (Figs 37−39, 50−52) without apodemal processes; preatrium reduced; dorsal apodemes strongly developed and divergent; shaft cylindrical and curved dorsally, with lateral elongate processes (may be branched) arising from near mid-length; without apical processes.

Female terminalia. Second valvula (Fig. 61) higher near mid-length than near base; apical third with prominent teeth.

Distribution. Brazil (Bahia, Minas Gerais, and Paraná).

Etymology. The generic name is feminine and a tribute to Dr. Dwight Moore DeLong in recognition of his remarkable contribution to our knowledge of the leafhoppers. The suffix -ana is common in names of other Gyponini genera.

Notes. Delongiana gen. nov. is similar to Regalana DeLong & Freytag, 1975 in size, shape and color. However, Delongiana gen. nov. differs from the latter by the following characteristics: (1) number and size of mottled maculae on forewing, which are small and numerous in Delongiana gen. nov. but less numerous and larger in Regalana ( Figs 65 −69); (2) scutellum with portion posterior to transverse carina flat in Delongiana gen. nov. (Figs 42, 45) but distinctly swollen in Regalana (Figs 3, 16); (3) pygofer in Delongiana gen. nov. with an oblique integument thickening near dorsal margin (Figs 33, 46) that is absent in Regalana species; (4) subgenital plate in Delongiana gen. nov. long and narrow, laterally expanded in the basal third (Figs 34, 47), but shorter and ligulate in Regalana (Figs 8, 21); (5) style in Delongiana gen. nov. is expanded apically (Figs 36, 49) but uniformly wide or expanded at the middle third of the blade in Regalana (Figs 10, 23); and (6) aedeagus in Delongiana gen. nov. with processes at middle third of shaft but not at apex (Figs 38, 51) but the apex is expanded with numerous processes or spines in Regalana (Figs 12, 25). In addition, the distribution of the two genera is somewhat distinct, Delongiana gen. nov. species occur from Northeastern to Southern Brazil, while Regalana species occur from the south of Central America to the Central-western Region of Brazil.

Figures

FIGURES 27─39. Delongiana baiana sp. nov., holotype male. 27, head and thorax, dorsal view. 28, head, frontal view. 29, head and thorax, lateral view. 30, forewing. 31–39, male terminalia: 31, sternite VIII, ventral view. 32, valve, ventral view. 33, pygofer, valve, and subgenital plate, lateral view. 34, subgenital plate, ventral view. 35, style and connective, dorsal view. 36, style, lateral view. 37, aedeagus, lateral view. 38, aedeagus posterior view. 39, aedeagus, dorsal view. Scale bars: 27–29 = 1.0 mm, 30 = 2.0 mm, 31–36 = 0.5 mm, 37–39 = 0.25 mm.

FIGURES 40─52. Delongiana ramosa sp. nov., holotype male. 40, head and thorax, dorsal view. 41, head, frontal view. 42, head and thorax, lateral view. 43, forewing. 44–52, male terminalia: 44, sternite VIII, ventral view. 45, valve, ventral view. 46, pygofer, valve, and subgenital plate, lateral view. 47, subgenital plate, ventral view. 48, style and connective, dorsal view. 49, style, lateral view. 50, aedeagus, lateral view. 51, aedeagus posterior view. 52, aedeagus dorsal view. Scale bars: 40–42 = 1.0 mm, 43 = 2.0 mm, 44–49 = 0.5 mm, 50–52 = 0.25 mm.

FIGURES 53─64. Delongiana ramosa sp. nov., female paratype. 53, head and thorax, dorsal view. 54, head, frontal view. 55, head and thorax, lateral view. 56, forewing, dorsal view. 57─64, female terminalia: 57, sternite VII, ventral view. 58, pygofer, lateral view. 59, first valvifer and first valvula, lateral view. 60, first valvula, apical portion. 61, second valvula, lateral view. 62, second valvula, apical portion. 63, second valvifer and third valvula, lateral view. 64, third valvula, apical portion. Scale bars: 53–55 = 1.0 mm, 56 = 2.0 mm, 57–59, 61, 63= 0.5 mm.

FIGURES 65─69. Dorsal habitus of the species. 65, Regalana jamari sp. nov. holotype. 66, Regalana madeira sp. nov. holotype. 67, Delongiana baiana sp. nov. holotype. 68, Delongiana ramosa sp. nov. holotype. 69, Delongiana ramosa sp. nov. female paratype. Scale bars = 2.0 mm.