Parcana ultima (DeLong & Freytag) Domahovski & Cavichioli, 2023

Domahovski, Alexandre Cruz & Cavichioli, Rodney Ramiro, 2023, Phylogenetic analysis and revision of the leafhopper genus Acuera DeLong & Freytag (Hemiptera: Cicadellidae: Gyponini) based on morphological data, Arthropod Systematics & amp; Phylogeny 81, pp. 79-164 : 79

Parcana ultima (DeLong & Freytag) comb. nov.

Figs 47 , 49E, F

Acuera (Parcana) ultima DeLong & Freytag, 1974: 197.

Diagnosis.

Pygofer (Fig. 47F ) with apical process long, curved dorsally. Style (Fig. 47J ) not expanded apically. Subgenital plate (Fig. 47G ) without filiform setae. Aedeagus (Fig. 47K, L ) with pair of subapical processes not branched, directed dorsally.

Measurements.

Total length: male 12.0 mm, female 13.0 mm.

Description.

External morphology as in generic description.

Coloration.

Head and thorax (Fig. 49E, F ) background yellowish-brown. Crown (Fig. 47A ) without black punctures; apex with small black spot; small elongate black macula adjacent to anterior margin of ocellus; posterior margin of crown with pair of rounded black spots behind ocelli. Face (Fig. 47B ) with transverse black bands over muscular impressions. Pronotum (Fig. 47A ) with black punctures and rounded black macula behind eye at one-third length of pronotum. Proepimeron (Fig. 47C ) with wide black band below pronotal carina. Forewing (Fig. 47D ) with scattered black mottling; larger black macula at apex of second anal vein and over cross veins of discal cells. Metatibia with cucullate bases of setae blacks.

Male terminalia.

Sternite VIII (Fig. 47E ) 1.4 × wider than long; lateral margins almost parallel; posterior margin straight, with small notch at middle. Pygofer, in lateral view (Fig. 47F ), 1.5 × longer than maximum height; without basodorsal processes; dorsal and ventral margins straight; dorsal margin declivous toward apex; macrosetae present on posterodorsal quadrant; apex forming long hook-shaped process, curved dorsally. Subgenital plate, in lateral view (Fig. 47F ), long, surpassing the pygofer apex; in ventral view (Fig. 47G ), 3.5 × longer than wide; outer margin with microsetae; lateral margins approximately parallel; apex obliquely truncated. Connective (Fig. 47H ) D-shaped, dorsal keel and stem reduced. Style, in dorsal view (Fig. 47I ), with outer lobe developed and rounded; in lateral view (Fig. 47J ), blade long and straight, slightly tapered toward apex; ventral margin serrated subapically; apex weakly bent dorsally, bearing dorsally a small subapical process. Aedeagus (Fig. 47K, L ) preatrium reduced; dorsal apodeme not developed, dorsal margin straight, lateral margins not produced laterally; apodemal process almost reaching the aedeagus apex, slightly expanded subapically, apex acute and curved dorsally; shaft cylindrical, thin and long, strongly curved dorsally on basal third, apex weakly sclerotized with long pair of subapical processes, one-fourth length of shaft, straight, arising laterally and directed dorsally.

Female terminalia.

Sternite VII with posterolateral corners rounded; posterior margin deeply excavated laterad of broad median lobe, which occupies half width of segment and is produced posteriorly as far as lateral angles. Ovipositor unknown.

Remarks.

Among the species of Parcana stat. nov., P. ultima comb. nov. is the species that most differs from all other species of this genus, due to the pygofer (Fig. 47F ) having a robust apical process curved dorsally, the subgenital plate (Fig. 47G ) without filiform setae, and the style (Fig. 47J ) not broadened at apex. Parcana ultima comb. nov. apparently is more closely related to P. spreta comb. nov. due its similarity in the coloration, mainly the proepimeron (Fig. 49D, F ) with a wide black band below pronotal carina and the forewings (Fig. 49C, E ) with scattered black mottling and the presence of large black maculae at apex of second anal vein and over cross veins of discal cells. According to the original descriptions and illustrations of the female sternite VII of both species, they are similar, with posterolateral angles rounded and the posterior margin excavated each side of a broad and rounded median lobe, however, in P. ultima comb. nov. the excavations are more rounded while in P. spreta comb. nov. are more acute. Based on these similarities, it is possible that P. ultima comb. nov. is a junior synonym of P. spreta comb. nov., however, as the female sternite VII of both species is a little different, we consider that males of P. spreta comb. nov. need to be studied to confirm this hypothesis.

Figures

Figure 47. Parcana ultima comb. nov. holotype male. A head and thorax, dorsal view. B head, ventral view. C head and thorax, lateral view. D forewing. E sternite VIII, ventral view. F pygofer, valve and subgenital plate, lateral view. G subgenital plate, ventral view. H connective, dorsal view. I style, dorsal view. J style, lateral view. K aedeagus, lateral view. L aedeagus, posterior view. Scale bars in mm.

Figure 49. Species of Parcana stat. nov., dorsal (left) and lateral (right) views. A, B P. mimica comb. nov., holotype male, CAS. C, D P. spreta comb. nov., holotype female, BMNH. E, F P. ultima comb. nov., holotype male, OSU. G, H P. ventusa comb. nov., holotype male, USNM.