Usanus igualaensis, Pinedo-Escatel & Dietrich, 2020

Pinedo-Escatel, J. Adilson & Dietrich, Christopher H., 2020, Nomenclatural changes and two new species in the leafhopper genus Usanus DeLong (Hemiptera: Cicadellidae) with notes on conservation status, Zootaxa 4822 (4), pp. 567-576 : 570

Usanus igualaensis sp. nov.

( Figs. 2, 4, 6, 8 , 11, 13–15, 18, 22–24 )

Type material. HOLOTYPE ♂: MEXICO: Guerrero, Iguala , X–25–1941 / D. M. DeLong Collection / D. M. DeLong Coll. / ( OSUC 356668 ).

Description. Overall color light brown with symmetrical black spots dorsally. Crown mostly brown-yellowish with pair of triangular black spots submedially on anterior margin ( Figs. 2 and 4 ) and pair of small black spots next to eyes, ecdysial line black and slender, width less than ocelli diameter. Ocellocular area black basad. Frontoclypeus mostly black with some arcuate transverse lines and midline yellowish. Anteclypeus upper half yellowish with lower half black. Gena light yellowish with small black spots below eyes. Lorum yellowish medially black laterally ( Fig. 6 ). Pronotum light–brown with some irregular gold spots on anterior margin and large pair of black spots centrally. Forewing translucent with brown veins ( Fig. 2 ). Exposed part of mesonotum orange ( Fig. 2 ). Venter and legs with black and brown patches ( Fig. 4 ).

Male genitalia. Pygofer lobe rounded with macrosetae scattered over distal third, 1.4x longer than wide ( Fig. 11 ). Segment X well–sclerotized laterad, conical, base wider than apex ( Fig. 13 ). Valve weakly projected posterad with rounded margin, 2x wider than long. Plate extended to pygofer apex, without macrosetae, digitate ( Fig. 14 ). Style very broad basally with preapical lobe weakly developed, apophysis short, straight, not expanded, apex rounded and blunt ( Fig. 18 ). Connective, stem apex truncate, arms only slightly separated anteriorly. Aedeagus slender, curved dorsad, with two pairs of apical processes, apical pair directed dorsad with apices curved anterad, preapical pair sinuous directed basad; lateral flanges directed anterodorsad with apices rounded ( Figs. 15, 22–24 ).

Female genitalia. Unknown.

Immature stages. Unknown.

Type locality. Iguala de la independencia, Guerrero ( Mexico), Figs. 1 and 8 .

Seasonality. Adults of this species are present in October.

Etymology. The species epithet refers to the type locality.

Measurements. Body length, male 5.69 mm and female unknown; head width 1.86 mm; crown length 0.16 mm; crown width 1.01 mm; eye length 0.21 mm; eye width 0.64 mm; width between ocelli 0.66 mm; ocellocular area length 0.31 mm; ocellocular area width 0.14 mm; frontoclypeus length 0.82 mm; frontoclypeus median width 0.84 mm; frontoclypeus apex width 0.32 mm; anteclypeus length 0.29 mm; anteclypeus width 0.24 mm; lorum length 0.32 mm; lorum width 0.2 mm; pronotum length 0.73 mm; pronotum width 1.66 mm; scutellum length 0.91 mm; scutellum width 1.16 mm; forewing length 3.89 mm.

Note. The holotype was labeled as a paratype of U. stonei by DeLong but was not dissected ( Fig. 8 ).

Remarks. This species is similar in external morphology to U. youajla , but U. igualaensis differs in having the aedeagus with slender distal processes arising at the base of a separate pair of rounded anterolateral flanges ( Figs. 22 and 24).

Figures

FIGURE 1. Distribution of the endemic Athysanini leafhopper genus Usanus DeLong in Mexico.

FIGURES 2–9. Leafhopper aspect. (2, 4, 6, 8) Usanus igualaensis sp. nov.; (3, 5, 7, 9) Usanus xochipalensis sp. nov.; 2–3 dorsal view; 4–5 lateral view; 6–7 anterior view; 8–9 labels.

FIGURES 10–22. Male genital capsule morphology. (10, 12, 16–17, 19–21) Usanus xochipalensis sp. nov.; (11, 13–15, 18, 22) Usanus igualaensis sp. nov.; 10–11 pygofer, lateral view; 12–13 pygofer, dorsal view; 14 valve and subgenital plates, ventral view; 15–16 anterior view; 17 apex of aedeagus, lateral view; 18–19, right style, ventral view; 20 connective, ventral view; 21–22 aedeagus, ventral view.

FIGURES 23–26. Aedeagal morphology. 23–24 Usanus igualaensis sp. nov.; 25–26 Usanus xochipalensis sp. nov.; 23, 25 lateral view; 24, 26 ventral view.