Thoradonta subtruncata

Gupta, Sunil Kumar, Shi, Jian-Ping & Chandra, Kailash, 2018, A new species of genus Thoradonta Hancock, 1908 (Orthoptera: Tetrigoidea: Tetrigidae) from India, Zootaxa 4455 (3), pp. 585-588: 586-587

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Thoradonta subtruncata

sp. nov.

Thoradonta subtruncata  sp. nov. (Figs. A–F)

Material examined (6 specimens).

Holotype. 1♂, DC. INDIA, Chhattisgarh, Korba, Bijakhera Nala ,, 22°24 ' 50.1 '', N, 83° 0 0 ' 33.5 '' E, 324m. coll. S. K. Gupta & party, Registration no.21090/H5. 

Paratypes. 1♂, 4♀, same locality as holotype Registration no. 21091/H5 to 21095/H5. 

Description. Male: Body small, stout, granulated, brown to dark brown. In dorsal view, vertex is lower in level of the distal margin of the compound eyes, in frontal view slightly concave, Median carina of vertex present in the distal half of the length of the vertex, elevated. Lateral carinae of the vertex present, strongly elevated, punctured. Vertex narrower than a compound eye. Median ocellus situated for below the level of the lower margin of the compound eyes, in the place of where facial carinae end. Lateral ocelli situated in between of compound eyes. Frontal costa bifurcates into facial carinae between the lateral ocelli and facial carinae run parallel to the median ocelli forming broad scutellum. Antennal grooves situated inferior margin of compound eyes. Antennal groove as wide as scutellum, eyes in frontal view sub-globular, in lateral view sub-globular. Pronotum transverse anteriorly, surpass the apex of hind femora. 10th abdominal segment, acute at apex, dorsum flattened, granulated, with developed rugosity and tubercles. Prozonal carinae distinct and convergent behind; posterior angles of lateral lobes of pronotum slightly dilated and laminated, upper lobe produced into a small sharp spine. Tegmen elongate, narrow at both ends. Hind wings extended upto the apex of pronotum. Fore legs: Femora 3.2 times as long as wide, upper and lower margins of femora sub-straight; serration on external face distinct; tibia clothed with 5 spines and some small hairs; second tarsal segments 3 times longer than first. Mid legs: Femora 3.6 times as long as wide, serrated carina on external face distinct, upper and lower mid carinae with several black warts, tibiae clothed with 3 spines and some hairs; second tarsal segments 3.4 times longer than first. Width of mid femora subequal width of the visible part of tegmina. Hind legs: Femora robust 2.5 times as long as wide, upper margins serrated, tibiae with 6 outer and 5 inner spines. First tarsal segments 4.2 times longer than third; tip of pulvilli I and II spinulately produced and pulvilli III obtusely, pulvilli III distinctly longer than length of I and II pulvilli. Subgenital plate 2.3 times as long as wide, apex with v-shaped incision; cerci cylindrical with obtuse tip.

Female: Very similar to male but slightly larger in size. Dorsal ovipositor valvulae 2.3 times as long as wide, ventral ovipositor valvulae 1.9 times as long as wide, outer margins of dorsal and ventral valvulae with saw like teeth.

Coloration. Body color from brown to dark blackish. Pronotal tubercles usually dark black. Fore tibiae, mid tibiae and hind tibiae with two dark brown hues, genicular lobe of hind femora dark brown. Tip of spines dark blackish.

Measurements. Male. Body length (from the tip of the vertex to the end of the abdomen): 7.46; head length: 0.75. Vertex: 0.49. compound eye length: 0.74, width: 0.52. scutellum width: 0.16. Pronotum length: 9.90, shoulder width: 2.40. Fore leg: femur length: 1.68, width: 0.52; tibia length: 1.57, width: 0.18; tarsus length (by segments): I: 0.73, II: 0.22; claw length: 0.11. Mid leg: femur length: 1.86, width 0.52; tibial length 1.54, width 0.15; tarsus length: I: 0.16, II: 0.56; claw length 0.19. Hind leg: femur length: 4.15, width: 1.62; tibia length: 3.51, width: 0.25; tarsus length: I: 0.65, II: 0.16, III: 0.34; pulvilli length: I: 0.18, II: 0.19, III: 0.26; claw length 0.20. tegmen length: 1.28, width: 0.54; subgenital plate length: 0.78, width: 0.33. Cerci length: 0.11.

Measurements. Female. Body length (from the tip of the vertex to the end of the abdomen): 8.37; head length: 0.87; Pronotum length: 11.47, shoulder width: 2.63. Fore leg: femur length: 1.22, width: 0.52; tibia length: 1.56, width: 0.16; tarsus length (by segments): I: 0.21, II: 0.48; claw length: 0.33. Mid leg: femur length 1.59, width 0.48; tibial length 1.91, width 0.22; tarsus length: I: 0.42, II: 0.54; claw length 0.16. Hind leg: femur length: 4.34, width: 1.28; tibia length: 1.94, width: 0.30; tarsus length: I: 0.92, II: 0.13, III: 0.69; pulvilli length: I: 0.19, II: 0.30, III: 0.27; claw length 0.21. tegmen length: 1.31, width: 0.64; Dorsal ovipositor valves length: 1.27, ventral ovipositor valves length: 1.01, cerci length: 0.18.

The new species Thoradonta subtruncata  sp. nov. is similar to Thoradonta spiculoba Hancock, 1912  . The major differences are listed in Table 1.

Etymology. The name of the species given after the character of the tegmen apex subtruncated.

FIGURES. A–F Thoradonta subtruncata  sp. nov. A. Body male, dorsal view; B. Body male lateral view; C. Body female lateral view; D. Head frontal view; E. Subgenital plate male lateral view; F. Tegmen lateral view; G–H, Thoradonta spiculoba Hancock, 1912  . G. Tegmen lateral view; H. Head frontal view.