Macromotettixoides Zheng, Wei & Jiang, 2005

Fan, Cheng-Mei, Li, Miao & Mao, Ben-Yong, 2023, Descriptions on two new species of the genus Macromotettixoides (Orthoptera Tetrigidae: Metrodorinae) from China, Zootaxa 5306 (1), pp. 127-134 : 127-129

Genus Macromotettixoides Zheng, Wei & Jiang, 2005

http://orthoptera.speciesfile.org/Common/basic/Taxa.aspx?TaxonNameID=1101427

Macromotettixoides Zheng, Wei & Jiang, 2005: 366 ; Zheng, 2005: 176; Zheng et al., 2006: 603, Deng, 2011: 543; Zheng et al., 2012: 329; Deng et al., 2014: 548; Deng, 2016: 155; Zha et al., 2017: 13 ; Han et al., 2020: 563 ; Zha et al., 2020:72; Deng et al., 2020: 42 ; Li et al., 2020: 111; Peng et al., 2021: 47.

Type species: Macromotettixoides jiuwanshanensis Zheng, Wei & Jiang, 2005

Diagnosis. The genus Macromotettixoides can be identified as a member of the subfamily Metrodorinae based on the posterior angles of pronotal lateral lobes turning outwards with apex truncated. In Metrodorinae , it is similar to Macromotettix Günther, 1939 , but differs in one concavity (namely ventral sinus) on the hind margin of lateral lobe of pronotum instead of two concavities (namely ventral sinus and tegminal sinus) in Macromotettix ; tegmina being always externally invisible (vestigial, covered by pronotum) but normal in Macromotettix .

Key to the species of Macromotettixoides Zheng, Wei & Jiang

(The following key is based upon the keys of Han, Li & Mao (2020) and Wei & Deng (2022). M. brachynota Zheng & Shi, 2009 , M. aelytra ( Zheng, Li & Shi, 2002) were described based on the larvae. So, them were eliminated from the key)

1. Width of vertex narrower than the width of an eye. China (Hainan)................... M. angustivertex Zha & Peng, 2021

- Width of vertex wider than the width of an eye.............................................................. 2

2. Anterior margin of pronotum obtusely angled forward........................................................ 3

- Anterior margin of pronotum truncated.................................................................... 6

3. Width of longitudinal furrow of frontal ridge equal to antennal groove diameter; pronotal disc smooth and interspersed with dense granules; lower margin of hind pronotal process and external lateral carina of metazona straigh.................. 4

Width of longitudinal furrow of frontal ridge wider than antennal groove diameter; pronotal disc with many net-like wrinkles and notchs; lower margin of hind pronotal process and external lateral carina of metazona curved...................... 5

4. Vertex 3.0 times as wide as one eye, anterior margin obtusely angled; vertex together with frontal costa obtuse rounded; paired interhumeral carinae present. China (Fujian)........................................... M. wuyishana Zheng, 2013

- Vertex 2.1 times as wide as one eye, anterior margin arcuate; vertex together with frontal costa right angled;interhumeral carina absent. China (Jiangxi)............................................. M. jiuwanshanensis Zheng, Wei & Jiang, 2005

5. Width of vertex between eyes 1.7–1.8 times width of compound eye; antennal grooves inserted between inferior margin of compound eyes; middle of pronotal disc flat and without concavity; interhumeral carina present. China (Guangxi)..................................................................................... M. lativertex Deng et al., 2014

- Width of vertex between eyes 2.5–2.6 times width of compound eye; antennal grooves inserted far below inferior margin of compound eyes; middle of pronotal disc with an obvious concavity on both sides of median carina; interhumeral carina absent. China (Yunnan).............................................................. M. rugodorsalis Li & Mao, 2020

6. Pronotum with shoulders inclined, humeral angle indistinct.................................................... 7

- Pronotum with shoulders relatively flat, humeral angle distinct................................................ 10

7. Antennal sockets situated below the level of ventral margins of eyes, or the upper margins of antennal base segments at level with the ventral margins of eyes at most................................................................... 8

- Antennal sockets distinctly situated between the level of ventral margins of eyes................................... 9

8. Prozonal carinae running parallel; hind process with netted keels, apex narrow and concave. China (Sichuan)............................................................................ M. undulatifemura Deng, Zheng & Yang, 2012

- Distance between prozonal carinae gradually narrowed backward; hind process with tubercula and paired thick keels, apex relatively broad and rounded. China (Yunnan).................................. M. tuberculata Mao, Li & Han, 2020

9. Hind process of pronotum with apex truncated; vertex narrower, 1.6–1.8 times as wide as one eye in female. China (Yunnan)......................................................................... M. truncata Mao, Li & Han, 2020

- Hind process of pronotum with apex concave; vertex broader, 2.0 times as wide as one eye in female. China (Yunnan)........................................................................... M. curvimarginus ( Zheng & Xu, 2010)

10. Median carina of pronotum strongly elevated and distinctly arch-like in profile or arch-like before shoulders............ 11

- Median carina of pronotum low and straight or undulated in profile............................................. 15

11. Median carina of pronotum distinctly arch-like in profile..................................................... 12

- Median carina of pronotum arch-like before shoulders and straight or undulated behind shoulders in profile............. 13

12. Antennal grooves inserted below inferior margins of compound eyes; caudal pronotum with apex narrowly rounded; pronotum without a pair of interhumeral carinae between shoulders. China (Zhejiang).................. M. curvicarina Deng, 2020

- Antennal grooves inserted between inferior margins of compound eyes; caudal pronotum with apex broadly rounded; pronotum with a pair of interhumeral carinae between shoulders. China (Yunnan)......................... M. amplifronta sp. nov.

13. Pronotal surface no tuberculiform convex between shoulders; middle femora with straight ventral margins. China (Hubei)........................................................................ M. wufengensi s Zheng, Wei & Li, 2009

- Pronotal surface distinctly tuberculiform convex between shoulders; middle femora with undulated ventral margins...... 14

14. Width of vertex 2.0 times the width of an eye; pronotal disc interspersed with dense granules, median carina of pronotum straight behind shoulders; lower outer carina of hind femora without projection. China (Hubei)...................................................................................................... M. cliva Zheng et al., 2006

- Width of vertex 1.4–1.5 times the width of an eye; pronotal disc interspersed with dense protuberances of variable sizes and short carinae and notchs, median carina of pronotum undulated behind shoulders; postmedian of lower outer carina of hind femora with two projections. China (Fujian).............................................. M. convexa Deng, 2020

15. Antennal sockets situated below the level of ventral margins of eyes, or the upper margins of antennal base segments level with the ventral margins of eyes at most...................................................................... 16

- Antennal sockets distinctly situated between the level of ventral margins of eyes.................................. 19

16. Lower carinae of fore and middle femur with two to three teeth and distinctly wavy; width of longitudinal furrow of frontal ridge narrower than or equal to antennal groove diameter..................................................... 17

- Lower carinae of fore and middle femur straight; width of longitudinal furrow of frontal ridge wider than antennal groove diameter. China (Hainan)......................................................... M. hainanensis ( Liang 2002)

17. Width of vertex 1.2 times the width of an eye; lower outer carina of hind femur smooth and without projection. China (Yunnan)................................................................. M. daweishana Wei & Deng, 2022

- Width of vertex is 1.4 times or more than width of an eye; postmedian of lower outer carinae of hind femur with two or three projections......................................................................................... 18

18. Width of vertex 2.0 times the width of an eye; pronotal surface interspersed with dense protuberances; lower margin of hind pronotal process straight; interhumeral carina absent. China (Sichuan)............... M. orthomargina Wei & Deng, 2022

- Width of vertex 1.4–1.5 times the width of an eye in female; posterior half of pronotal disc interspersed with net-like carinae; lower margin of hind pronotal process curved; interhumeral carina present. China (Guangxi).................................................................................................. M. shengtangshanensis Deng, 2020

19. Pronotum without interhumeral carinae between shoulders................................................... 20

- Pronotum with a pair of interhumeral carinae between shoulders............................................... 21

20. Pronotum coarse, disc with many net-like wrinkles and notches; width of vertex 2.1 times the width of an eye. China (Taiwan) ...................................................................... M. taiwanensis ( Liang, 2000)

- Pronotum smooth, disc covered with granules; width of vertex 1.4 times the width of an eye. China (Hunan).................................................................................... M. badagongshanensis (Zheng, 2013)

21. Width of longitudinal furrow of frontal ridge narrower than antennal groove diameter; ventral margins of middle femur undulate........................................................................................... 22

- Width of longitudinal furrow of frontal ridge equal to or wider than antennal groove diameter; ventral margins of middle femur straight............................................................................................ 23

22. Upper margin of pronotum elevated before shoulder and slightly undulate behind shoulder; hind process of pronotum short and broad, apex narrowly rounded; lateral carinae of prozona parallel. China (Yunnan).............. M. yingjiangensis sp. nov.

- Upper margin of pronotum nearly straight, only slightly elevated with swollen base before shoulders; caudal pronotum suddenly fined with apex truncated; lateral carinae of prozona constricted backwards. China (Fujian)..................................................................................................... M. daiyunshanensis Deng, 2020

23. Vertex 1.3 times as wide as an eye; anterior margin of vertex truncate; three pulvilli of first segment of posterior tarsi equal in length. China (Fujian)................................................................. M. zhengi Deng, 2011

- Vertex 1.6–1.7 times as wide as an eye; anterior margin of vertex arcuate; three pulvilli of first segment of posterior tarsi increasing in length. China (Yunnan).................................................... M. longling Deng, 2016