Polyodontotrochus, González-Mozo & Mckamey, 2024

González-Mozo, Laura & Mckamey, Stuart H., 2024, A new genus and four new species of Darnini (Hemiptera: Membracidae) from South America, Zootaxa 5415 (1), pp. 169-180 : 172

Key to species of Polyodontotrochus

1. Pronotum with suprahumeral horns distinctly curved upward ( Fig. 1 )..................................... P. elevatus

- Pronotum with suprahumeral horns slightly curved upward ( Figs.11, 14 ) or straight ( Fig. 13 )......................... 2

2. Suprahumeral horns in dorsal view curved upward, apex of the horns extends beyond the most anterior part of the metopidium ( Figs. 11, 14 ); aedeagus without longitudinal subdivision at apex ( Figs. 31, 32 ).................................... 3

- Suprahumeral horns in dorsal view straight, apex of the horns does not extend beyond the most anterior part of the metopidium ( Fig. 13 ); aedeagus with longitudinal subdivision at apex ( Fig. 37 ).......................................... P. inpa

3. Forewing s crossvein absent, R2+3 and R4+5 fused at apex; aedeagus in lateral view compressed ( Fig. 23 )... P. auriculatus

- Forewing s crossvein present, R2+3 and R4+5 not fused at apex; aedeagus in lateral view sinuate ( Fig. 34 ).................................................................................................. P. extentapalaestrus

Figures

FIGURES 1–6. (1) Polyodontotrochus auriculatus forewing; (2) P. inpa Metathoracic leg; (3) P. elevatus metathoracic tibia; (4–6) P. auriculatus; (4) metathoracic trochanter studs; (5–6) SEM of metathoracic leg: (5) metathoracic trochanter ventral view showing studs; (6) metathoracic femur ventral view showing cucullate setae and studs. Abbreviation: C: Costal vein; CS: cucullate setae; Cu: Cubital vein; M: Medial vein; R: Radial vein.

FIGURES 11–14. Dorsal views. (11) P. auriculatus; (12) P. elevatus: (13) P. inpa; (14) P. extentapalaestrus.

FIGURES 29–37. Male genitalia of P. extentapalaestrus and P. inpa. (29–34) P. extentapalaestrus; (29) Abdominal tergum VIII and pygofer, dorsal view; (30) subgenital plate, ventral view; (31) dissected pygofer, lateral view (anal segments pushed ventrally after dissection); (32) aedeagus and styles, anterior view; (33) Detail, aedeagus scalelike ridges; (34) aedeagus and styles, lateral view. (35–37) P. inpa; (35) aedeagus, anterior view; (36) aedeagus, lateral view; (37) Detail, aedeagus scalelike ridges.

FIGURES 19–24. Male genitalia P. auriculatus. (19) Pygofer, lateral plate and subgenital plate lateral view; (20) Subgenital plate; (21) Aedeagus anterior view; (22) Style posterior view; (23) Aedeagus lateral view; (24) Detail, aedeagus scalelike ridges.