Aalatettix

Zheng, Zhemin & Lin, Liliang, 2015, A review of the genus Aalatettix with the description of a new species from China (Orthoptera: Tetrigidae), Zootaxa 3986 (4), pp. 488-492 : 489

Key to species in the genus Aalatettix

1 Width of vertex 2.0–2.8 times of an eye; apex of hind process of pronotum with a triangular concave ..................... 2

- Width of vertex 1.6–1.7 times of the width of an eye; apex of hind process of pronotum narrow rounded ................ 4

2 Width of vertex 2.8 times of an eye; vertex and frontal ridge forming an obtuse rounded angle in profile; upper margin of pronotum arched before shoulders but undulated behind that; anterior margin of pronotum almost straight; hind process of pronotum reaching apex of hind femur; lower margin of mid femur undulated ... A. lativertex Zheng

- Width of vertex 2.0 times of an eye; vertex and frontal ridge forming a right or obtuse angle in profile; upper margin of pronotum straight or extremely arc-shape protuberant; anterior margin of pronotum obtuse protruded; hind process of pronotum reaching two-thirds or three-fourths of hind femur; lower margin of mid femur straight ............... 3

3 Vertex and frontal ridge forming a right angle in profile; upper margin of pronotum almost straight; lateral keels of prozona parallel; with a pair of short longitudinal keels between shoulders ................ A. longipulvillus Zheng & Mao

- Vertex and frontal ridge forming blunt circle in profile; upper margin of pronotum extremely arc-shape protuberant; lateral keels of prozona contracted backward; without a pair of short longitudinal keels between shoulders ............... ..................................................................................................................................... A. gibbosa Zheng, Cao & Chen

4 Upper margin of pronotum extremely arc-shape protuberant in profile; vertex and frontal ridge forming blunt circle or rounded in profile .....................................................................................................................................................5

- Upper margin of pronotum almost straight or arched before shoulders but straight behind that in profile; vertex and frontal ridge forming blunt circle or rectangle in profile ..............................................................................................6

5 Anterior margin of vertex arc-shape; frontal ridge slightly concave before lateral ocelli; antennae located between lower margin of eyes, 14 segmented, length of a segment in the middle 4 times as its width; hind process of pronotum reaching four-fifths of hind femur; three pulvilli of the first segment of hind tarsi gradually larger in turn; hind tibia black brown............................................................................................... A. cangshanensis Zheng, Lin & Zhang

- Anterior margin of vertex straight; frontal ridge distinctly concave before lateral ocelli; antennae located below lower margin of eyes, 16 segmented, length of a segment in the middle 2.5 times as its width; hind process of pronotum reaching almost apex of hind femur; 3rd pulvillus of the first segment of hind tarsi extremely large, 1st pulvillus smaller, 2nd pulvillus extremely small; hind tibia black, with two light rings in the middle ..... A. nyalamensis sp. nov.

6 Vertex and frontal ridge forming a right angle in profile; longitudinal furrow of frontal ridge as wide as the first segment of antennae; upper margin of pronotum arched before shoulders but straight behind that in profile; hind process of pronotum reaching two-thirds of hind femur ...................................................... A. leshanensis Zheng, Cao & Chen

- Vertex and frontal ridge forming rounded in profile; longitudinal furrow of frontal ridge wider than the first segment of antennae; upper margin of pronotum almost straight in profile; hind process of pronotum reaching four-fifths of hind femu ................................................................................................................................ A. hupinshanensis Zheng