Coarctana occultata, 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

Coarctana occultata sp. nov.

Figs 22 , 31I, J

Diagnosis.

Pygofer (Fig. 22G ) with apex broad and rounded. Subgenital plate (Fig. 22H ) with few filiform setae near outer margin and a longer apical group on dorsal surface. Style (Fig. 22K ) apex tapered, curved dorsally and acute. Aedeagus (Fig. 22L, M ) apodemal process slender at base and enlarged subapically; shaft apex with pair of subapical processes short, about 1/5 length of shaft, curved ventrally.

Measurements.

Total length: holotype male 7.8 mm; paratype, male (n = 1) 8.1 mm.

Description.

Head, in frontal view (Fig. 22B ), frons 1.2 × wider than long; frontogenal suture distant from eye margin by approximately the width of scape; clypeus very wide, 1.1 × wider than long; lateral margins straight and parallel near base and distally strongly convergent toward apex; apex straight. Head, in lateral view (Fig. 22C ), crown-face transition thin, with 4 transverse carinae; clypeus slightly inflated. Profemur AV row with 4-5 setae; PV row with 1-2 setae. Protibia PD row with 4 setae and undifferentiated intercalary setae; PV row with 5 setae and undifferentiated intercalary setae. Metatibia PD, AD and AV rows with 23-24, 12 and 15-16 macrosetae respectively. Metatarsomere I 4 × longer than apical width; inner row of the ventral surface with 7-9 setae. Other characteristics as in generic description.

Coloration.

Head and thorax (Figs 22A-D , 31I, J ) reddish-brown. Face (Fig. 22B ) yellowish; frons reddish-brown below crown face transition; antenal pit black. Proepimeron (Fig. 22C ) black. Forewing (Fig. 22D ) with small black maculae on apex of anal veins, cross veins of discal and apical cells; costal and 5th apical cells dark brown. Metatibia (Fig. 22C ) with cucullate bases of setae blacks.

Male terminalia.

Sternite VIII (Fig. 22E ) 1.5 × wider than long; lateral margins parallel; posterior margin rounded. Valve (Fig. 22F ) 1.6 × wider than long; posterior margin slightly excavated. Pygofer, in lateral view (Fig. 22G ), 2 × longer than maximum height; basodorsal process thin and long, extending ventrally by 1/3 height of lateral lobe; anteroventral margin rounded; posterodorsal margin straight; posteroventral margin rounded; apex broad, rounded. Subgenital plate, in lateral view (Fig. 22G ), almost reaching pygofer apex; in ventral view (Fig. 22H ), elongated, 3.8 × longer than wide, maximum width near half length; dorsal surface with few filiform setae near outer margin and a longer apical group on dorsal surface; lateral margins slightly rounded; apex tapered, rounded. Connective (Fig. 22I ) wider than long; anterior margin moderately excavated; dorsal keel and stem reduced. Style, in dorsal view (Fig. 22J ), with outer lobe truncated; in lateral view (Fig. 22K ), blade slender, slightly tapered toward apex; dorsal and ventral margins almost straight; ventral margin with apical half serrated; apex curved dorsally, acute. Aedeagus (Fig. 22L, M ) preatrium weakly developed; dorsal apodeme bent posterad, dorsal margin rounded, lateral margins produced laterally; apodemal process slender at base and enlarged subapically, strongly curved dorsally near base; apex rounded; shaft approximately cylindrical, very long and thin, strongly curved dorsally near base, apical half slightly sinuate; apex with pair of subapical processes thin and short, curved ventrally. Other characteristics as in generic description.

Female.

Unknown.

Material examined.

Holotype male: Peru: " Peru, Cuzco, Estrada 30 C\ 26km W Quincemil, 23.viii.2012, (light)\ 13°21′18″S 70°53′22″W,\ 985m R.R. Cavichioli leg." (MUSM) . Paratype: " Peru, Dept. Amazonas, Distr.\ Águas Verdes, Bagua / Tarapoto Rd \ (5N) at Km 403, Malaise , 1-8.V.2009 \ ME Irwin, G Antón Maya\ 1125m 05°41′23″S, 77°38′13″W (DZRJ) .

Etymology.

The new species name comes from the Latin word “occultatum” and means hidden. This name was chosen because the studied specimens were miss identified as Curtara apena .

Remarks.

Our analysis recovered C. occultata sp. nov. as sister to C. apena comb. nov. with low branch support (SR <50) (Fig. 7 ). These species have a similar coloration (Fig. 31A, B, I, J ), and the subgenital plates (Fig. 22H ) with long filiform setae forming an apical group, and a similar aedeagus shape (Fig. 22L ). However, the new species is differentiated by having a shorter pygofer and the aedeagus with a single pair of subapical processes.

Figures

Figure 7. Phylogenetic relationships of Acuera found in the implied weighting analysis for the two equally most parsimonious trees, K = 3.700 and 4.284, length = 514, consistency index = 0.362, retention index = 0.771. Symmetric resampling values (<50) are marked next to branches; red stars represent the type species of the three subgenera of Acuera. Synapomorphies are marked with black circles, while homoplasies are marked with empty circles.

Figure 22. Coarctana occultata sp. 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 valve, ventral view. G pygofer, valve and subgenital plate, lateral view. H subgenital plate, ventral view. I connective, dorsal view. J style, dorsal view. K style, lateral view. L aedeagus, lateral view. M aedeagus, posterior view. Scale bars in mm.

Figure 31. Species of Coarctana gen. nov., dorsal (left) and lateral (right) views. A, B C. apena comb. nov., holotype male, AMNH. C, D C. asymmetrica sp. nov., holotype male, DZUP. E, F C. glabra sp. nov., holotype male, DZRJ. G, H C. nigromedia sp. nov., holotype male, DZUP. I, J C. occultata sp. nov., holotype male, DZUP. K, L C. oricula sp. nov., holotype male, DZUP. M, N C. parvula sp. nov., holotype male, DZUP.