Steirodontini

Cadena-Castañeda, Oscar J., 2016, New taxa and some clarification of the tribe Steirodontini (Orthoptera: Tettigoniidae; Phaneropterinae): Tenth contribution to the suprageneric organization of Neotropical phaneropterines, Zootaxa 4208 (3), pp. 237-248 : 239

Key to genera of the tribe Steirodontini

(Modified from Emsley, 1970)

1. Fastigium of the vertex not conical and not prolongated, shorter than scapus and pedicellus. Male subgenital plate with styles.....................................................................................................2

- Fastigium of vertex conical, longer than scapus and pedicellus together, being prolongated towards the front. Male subgenital plate without styles (only pseudo-styli prolongations).... Emsleyfolium Cadena-Castañeda, Mendes & Alves-Oliveira, 2016

2. Coxal spine of the fore leg inconspicuous, postero-lateral and posterior margins of pronotal disc black. Male cerci more or less straight............................................................................................. 3

- Coxal spine of the fore leg conspicuous, postero-lateral and posterior margins of pronotal disc not black (except Steirodon validum ). Male cerci regularly curved along their whole length................................................ 4

3. Pronotal disc no expanded laterally and without spines on lateral carine (only in Stilpnochlora incisa the lateral carina has tubercles). Tegmina elongated and lanceolate. Ventral spines of the hind femur and dorsal spines of the hind tibia serrulated and little developed. Male cerci with two apical teeth...................................... Stilpnochlora Stål, 1873

- Pronotal disc expanded laterally and with spines on lateral carinae. Tegmina elongated and rectangular. Ventral spines of the hind femur and dorsal spines of the hind tibia well developed. Male cerci with an apical tooth.............................................................................................. Nicklephyllum Cadena-Castañeda n. gen.

4. Tegmina with transverse and small spots of darker color; frontal fastigium unilobed (with exception of subgenus Eupeucestes ); male tenth tergite produced posteriorly; meso and metathoracic sternal lobes rounded posteriorly; male cerci strongly curved; female with very small median or paired processes between large pair of processes arising on ninth tergite............................................................................................. Cnemidophyllum Rehn, 1917

- Tegmina without transverse markings; frontal fastigium usually bilobed; male tenth tergite unspecialized and rounded; meso and meta-thoracic sternal lobes at right angles or acutely pointed posteriorly; male cerci moderately curved; female with only a single pair of processes on ninth tergite................................................. Steirodon Serville, 1831