Astatometopon, Campodonico, 2017

Campodonico, Juan F., 2017, Astatometopon sakakibarai gen. & sp. nov., a montane planthopper from Chile (Hemiptera: Fulgoroidea: Delphacidae), Acta Entomologica Musei Nationalis Pragae 57 (1), pp. 1-10 : 3

Astatometopon gen. nov.

( Figs 1–32 )

Type species. Astatometopon sakakibarai sp. nov., here designated.

Description. General body shape ( Figs 1–5 ) oblong, slightly more than twice longer than wide.

Head ( Figs 1–11 ) wider than or subequal in width to pronotum. Macrocoryphe ( Figs 1–2, 4–5 ) quadrangular, wider than long; apex rounded; anterior side and posterior margin almost equal in width; posterior margin, in dorsal view, medially positioned at anterior half of eyes; coryphe composed by two pentagonal cells enclosed by carinae. Fastigium ( Fig. 3 ) smoothly curved. Superior side of eumetope ( Figs 6–11 ) wider than its inferior margin; carinae of metope fading on fastigium, then subparallel and converging on lower margin of eumetope; carinae sometimes weak, absent, or reduced to a single carina. Clypeus ( Figs 6–11 ) tricarinate. Rostrum reaching mesocoxae. Antennae ( Figs 6–11 ) with scape shorter than pedicel.

Thorax ( Figs 1–5 ). Pronotum ( Figs 1–2, 4–5 ) subtrapezoidal, wider posteriorly; posterior margin bisinuate; median carina distinct; lateral carinae curved laterally behind eyes, not reaching posterior margin. Mesonotum ( Figs 1–2, 4–5 ) with median and lateral carinae distinct; median carinae fading at scutellum; scutellum transversely striated.

Legs. Metatibiae ( Figs 14–15 ) with one lateral tooth near tibiofemoral articulation and another one near middle of its length. Calcar ( Fig. 14 ) without teeth on its hind margin.

Male abdomen. Sternum I ( Fig. 16 ) with apodemes short and directed dorsocaudad. Pygofer ( Figs 17–18 ), in lateral view, higher than long; opening with no ventral processes; diaphragm strong, with armature. Segment X ( Figs 19–21 ) wider than long, with pair of posteroventral processes. Segment XI ( Figs 19–21 ) longer than segment X. Phallus ( Figs 21–24 ) asymmetrical, with conspicuous porrect process arising from base. Suspensorium ( Figs 21–24 ) ring-like, projected caudally over phallus. Styles ( Figs 25–26 ) short, not surpassing height of diaphragm, narrowed at apex.

Differential diagnosis. See discussion.

Etymology. Combination of the Greek words αστατος (= astatos, inconstant) and μέτωπον (= metopon, forehead) in reference to the inconstant carination of the metope in the eumetope. Gender neuter.

Figures

Figs 1–11. Astatometopon sakakibarai sp. nov. 1–2 – brachypterous male, habitus, dorsal view; 3 – brachypterous male, habitus, lateral view; 4 – brachypterous female, habitus, dorsal view; 5 – macropterous male, habitus, dorsal view; 6–11 – anterior part of body, ventrocranial view (6, 10 – male; 7–9, 11 – female).

Figs 12–15. Astatometopon sakakibarai sp. nov. 12 – forewing of a macropterous specimen; 13 – forewing of a brachypterous specimen; 14 – hind leg, outer view; 15 – hind leg, inner view.

Figs 16–26. Astatometopon sakakibarai sp. nov., male. 16 – sternum I, cranial view; 17 – pygofer, caudal view; 18 – pygofer, lateral view; 19 – segment X, caudal view; 20 – segment X, dorsal view; 21 – phallic complex, lateral view; 22 – phallus, lateral view; 23 – phallus, dorsal view; 24 – phallus, ventral view; 25 – style, lateral view; 26 – style, caudal view.

Figs 27–32. Astatometopon sakakibarai sp. nov., female. 27 – abdomen, ventral view; 28 – gonoplac; 29 – gonapophysis IX; 30 – gonapophysis VIII; 31 – detail of gonapophysis VIII; 32 – gonocoxa VIII.