Eucriotettix Hebard 1930

Li, Xiao-Dong, Deng, Wei-An, Zheng, Zhe-Min & Wei, Shi-Zhen, 2014, The tetrigid genus Eucriotettix Hebard (Orthoptera: Scelimeninae) from China with description of two new species, Journal of Natural History (J. Nat. Hist.) 48 (33 - 34), pp. 2083-2096 : 2084-2086

Eucriotettix Hebard 1930

Eucriotettix Hebard 1930 [1929], p. 573; Günther 1938; Shishodia 1991; Jiang and Zheng 1998; Liang and Zheng 1998; Zheng 2005; Deng et al. 2007; Deng et al. 2012, p. 486.

Type species: Eucriotettix tricarinatus ( Bolivar 1887) = Criotettix tricarinatus Bolívar, 1887 , Sri Lanka (= Ceylon), by original designation.

Body elongate and slender. Colour brown or dark brown.

Head conspicuously exerted; vertex with lateral margins divergent posteriorly, anterior width narrower than width of eye at same level, in lateral view, frontal costa arched upward antennae. Antennae filiform, inserted between the lower margins of eyes. Eyes elevated above vertex, globular in shape, lateral ocelli inserted between middle of anterior margins of eyes. Pronotum truncate anteriorly, mid-keel of pronotum conspicuous; abbreviated carinae present; hind process of pronotum extending beyond apices of hind femora. Posterior angles of lateral lobes of pronotum produced into sharp spines, straight or directed outwards. Visible part of tegmina elongated, rounded at apex. Hind wings reaching apex of hind process. Upper and lower margins of fore femora and mid femur entire, margins of hind femur finely serrulate ( Figures 3I , 5L ). First segment of posterior tarsi is longer than third.

Species of the genus Eucriotettix are usually associated with, but not limited to, moist environments, living along the moist stony area on the border of streams in tropical rainforests. Some have suggested that the often-flattened front and median limbs are used like paddles for swimming. Their diet consists mostly of algae growing on the moist stony surface, along with lichens and other forms of humus. They generally overwinter as adults.

Key to the species of Eucriotettix Hebard from China

1. Posterior angles of lateral lobes of pronotum without long spine ........... 2 Posterior angles of lateral lobes of pronotum with long spines ............... 9

2. Hind process longer, reaching or surpassing two-thirds of hind tibia ..... 3 Hind process reaching middle of hind tibia or shorter ............................ 4

3. Apex of posterior angles of lateral lobes of pronotum pointing sidewards ............................................................ Eucriotettix grandis ( Hancock 1912) Apex of posterior angle of lateral lobes of pronotum pointing backwards ................................................................. Eucriotettix ridleyi Günther 1938

4. Lower margins of fore and mid femora straight ..................................... 5 Lower margins of fore and mid femora undulated ................................. 7

5. Width of vertex about 1.2 times narrower than width of one eye, upper margin of pronotum straight in profile, ..... Eucriotettix tridentatus sp. nov. Width of vertex as wide as width of one eye, upper margin of pronotum undulated in profile ................................................................................. 6

6. Antennae inserted between lower margins of eyes, hind wing reaching apex of hind process of pronotum ............................................................... ........................................... Eucriotettix brachynotus Zheng and Jiang 1997 Antennae inserted above lower margins of eyes, hind wing surpassing apex of hind process of pronotum ...... Eucriotettix longipennis Deng et al. 2007

7. Width of vertex about 1.25 times narrower than width of one eye, hind process reaching middle of hind tibia. ................................................. ......................................................... Eucriotettix amplifemurus Zheng 1998 Width of vertex about 1.5–1.7 times narrower than width of one eye, hind process reaching apex of hind tibia ......................................................... 8 8. Mid keel of pronotum interrupted, upper margin of pronotum undulating in profile, apex of posterior angles of lateral lobes of pronotum spinous, width of mid femora equal to width of tegmina .................................................... ....................................................... Eucriotettix interrupta Deng et al. 2006 Mid keel of pronotum entire, upper margin of pronotum straight in profile, apex of posterior angles of lateral lobes of pronotum horned, width of mid femora wider than width of tegmina ........................................................... ............................................. Eucriotettix nigripennis Deng and Zheng 2012

9. Lateral spines of pronotum slightly curved forward .................................... .......................................................... Eucriotettix hainanensis Günther 1938 Lateral spines of pronotum pointing sideways or obliquely backwards .... 10

10. Lateral spines of pronotum shorter, pointing obliquely backwards ........ 11 Lateral spines of pronotum pointing sideways ...................................... 13

11. Disc of pronotum coarse, having numerous tubercles and short carinae; mid keel of pronotum not entire, interrupted ... Eucriotettix torulisinotus sp. nov. Disc of pronotum smooth, mid keel of pronotum entire ....................... 12

12. Width of frontal sulcus narrower than width of scapus of antenna; hind process of pronotum reaching two-thirds of hind tibia; hind wing surpassing top of hind process; lower margin of hind femur undulating ...................... ....................................... Eucriotettix wuliangshanensis Zheng and Ou 2003 Width of frontal sulcus equal to width of scapus of antenna; hind process of pronotum nearly reaching top of hind tibia; hind wing not reaching top of hind process; lower margin of mid femora straight ..................................... .............................................. Eucriotettix longidorsalis Zheng and Ou 2011

13. Width of vertex about 1.3 times narrower than width of one eye; lateral keels of prozona parallel ...................... Eucriotettix oculatus ( Bolivar 1898) Width of vertex about 1.6–2.0 times narrower than width of one eye; lateral keels of prozona of pronotum distinctly constricted backwards ............ 14

14. Antenna 13-segmented; disc of pronotum convex between shoulders; humeral angle arched; lower margins of mid femora straight; width of mid femora narrower than width of tegmina; length of pronotum ♂ 16.5 mm, ♀ 18.5 mm ...................................... Eucriotettix guipingensis Li et al. 2000 Antenna 15-segmented; disc of pronotum flat between shoulders; humeral angle obtuse; lower margins of mid femora undulating; width of mid femora equal to width of tegmina; length of pronotum ♂ 11.0– 11.5 mm, ♀ 14.0– 14.5 mm ............................. Eucriotettix strictivertex Deng and Zheng 2012

Figures

Figure 3. Eucriotettix tridentatus sp. nov. (A) Head and antennae, dorsal view; (B) head and lateral lobes of pronotum, lateral view; (C) head, frontal view; (D) head, prozona and humeral angle, dorsal view; (E) mid femur and tegmina, lateral view; (F) posterior angles of lateral lobes of pronotum, dorsal view; (G) fore femur, lateral view; (H) mid femur, lateral view; (I) hind femur, lateral view; (J) hind tibia, dorsal view; (K) posterior tarsi, lateral view; (L) subgenital plate of male, lateral view; (M) subgenital plate of male, ventral view; (N) ovipositor of female, lateral view; (O) subgenital plate of female, ventral view. Scale bar = 1 mm.

Figure 5. Eucriotettix torulisinotus sp. nov. (A) Female, lateral view of body; (B) female, dorsal view of body; (C) head, dorsal view; (D) head and lateral lobes of pronotum, lateral view; (E) head, prozona and humeral angle, dorsal view; (F) head, frontal view; (G) mid femur and tegmina, lateral view; (H) posterior angles of lateral lobes of pronotum, dorsal view; (I) Antennae, lateral view; (J) fore femur, lateral view; (K) mid femur, lateral view; (L) hind femur, lateral view; (M) hind tibia, dorsal view; (N) posterior tarsi, lateral view; (O) ovipositor of female, lateral view; (P) subgenital plate of female, ventral view.