Thoradonta spiculobaoides Zha and Kang

Zha, Ling-Sheng, Wen, Ting-Chi, Kang, Ji-Chuan & Hyde, Kevin D., 2015, The genus Thoradonta in Thailand (Orthoptera: Tetrigidae: Scelimeninae) with description of two new species, Journal of Natural History 50, pp. 833-845 : 840-843

publication ID	https://doi.org/ 10.1080/00222933.2015.1091101
publication LSID	lsid:zoobank.org:pub:6B7A2291-6963-4920-82BC-CFA47AE59C03
DOI	https://doi.org/10.5281/zenodo.4328154
persistent identifier	https://treatment.plazi.org/id/03C0BC4F-FFB7-FF96-FEF7-FF41FE3E1163
treatment provided by	Carolina
scientific name	Thoradonta spiculobaoides Zha and Kang
status	sp. nov.

Treatment

Thoradonta spiculobaoides Zha and Kang View in CoL sp. nov.

( Figures 3A–C View Figure 3 , 4A–F View Figure 4 , 5A–D View Figure 5 )

Male

Body size small, covered with numerous small granules and many nodules ( Figure 3A–B View Figure 3 ). Head not protruding over level of pronotal surface; vertex 1.5–1.6 times as wide as one eye, anterior margin straight, protruding but not surpassing anterior margins of eyes, lateral margins folded upwards but not surpassing top of eyes ( Figure 4A, C View Figure 4 ); median carina conspicuous and protruding in anterior half which is visible before eyes in profile, while obscure or absent in posterior half; vertex and frontal ridge roundly protruding, excessively concave between lateral ocelli, and then excessively archedly protruding between antennae, longitudinal furrow about as wide as first segment of antenna ( Figure 4B View Figure 4 ). Antenna filiform, 15-segmented, inserted slightly below lower margins of eyes ( Figure 4B View Figure 4 ), length of longest segment (segment IV) about six times its width. Eyes globose, protruding but not above level of pronotum; lateral ocellus situated slightly below middle of anterior margin of eye. Pronotum very coarse, covered with numerous small granules and many nodules; anterior margin straight, lateral keels erected, slightly contracted backward, sometimes interrupted in middle or distal part excessively contracted inward ( Figure 4A View Figure 4 ). Mid-keel not reaching anterior margin of pronotum, otherwise nearly complete, in profile upper margin distinctly undulate with wave peaks becoming lower backward and disappearing in distal area. These sinusoidal waves lamellate and erected, first highest, with intumesced base, both sides of intumescence with a pair of big nodules at margins of pronotum; second lamella longest and undulate, on both sides pronotal disc distinctly concave followed by a pair of long oblique nodules, and lateral margins of pronotum distinctly folded upwards; the latter mid-keel with about seven or eight lamellae, no less than four are visible and they connect with nodules of both their sides respectively ( Figure 3A, B View Figure 3 ). Humeral angle obtusely angled, with a pair of abbreviated carinae between shoulders, pronotum slightly uplifted between shoulders ( Figure 3A, B View Figure 3 ); hind process of pronotum long cone-shaped, surpassing slightly beyond top hind femora, distal part slightly upcurved and apex truncate ( Figure 3A, B View Figure 3 ); posterior angles of lateral lobes of pronotum extending outwards, distal part nearly transverse or slightly oblique backward, fore margin of posterior angle smooth while hind margin with small teeth, apex spine-like; posterior margin of each lateral lobe with two concavities. Tegmina ovate, 2.3 times as long as its width, apex rounded ( Figure 5C View Figure 5 ). Hindwing not reaching top of hind process of pronotum but slightly surpassing beyond top of hind femur ( Figure 3A View Figure 3 ). Upper and lower margins of fore and mid femora undulate, with fine teeth; mid femur wider than tegmen and fore femur, middle femur distinctly narrowed from basal to distal side, and basal part thicker than distal part ( Figure 5A, C View Figure 5 ). Hind femur about 2.5 times as long as wide, upper and lower margins dentate, outer side and upper side with a series of nodules; upper margin with a triangular protrusion before antegenicular, antegenicular isolated and long triangular, its apex nearly right angled, genicular denticle fingered extending backward and apex nearly quadrate ( Figure 5B View Figure 5 ). Hind tibia distally slightly wider than basally, outer side with five to seven spines, inner side with for or five spines; first segment of hind tarsus 1.3–1.4 times (variable in different specimens) longer than third, third pulvillus about as long as second and slightly longer than first pulvillus, apices of all pulvilli sharp ( Figure 5D View Figure 5 ). Subgenital plate short cone-shaped, apex bifurcate and bidentate ( Figure 4D View Figure 4 ).

Body dark brown. Antenna brown and colour of distal segments darker; hindwings black; fore and mid femora and tibiae with three yellowish brown bands, bands of femora obscure; lower outside of hind femur black, centre of inner side of hind femur dark brown; hind tibia with two long yellowish brown bands.

Female

Slightly larger than male. Upper margin of fore femur arched, distinctly narrowed from basal to distal side; width of mid femur slightly narrower than width of tegmen, not narrowed or thicker from basal to distal area ( Figure 3C View Figure 3 ). Ovipositor: length of upper valvulae about 4.0 times its width, outer margins of upper and lower valvulae with small saw-like teeth ( Figure 4E View Figure 4 ). Posterior margin of subgenital plate: middle triangularly protruding, sometimes this protrusion folded inward, forming a basal concavity and a protrusion on both sides, and even the triangular protrusion invisible in ventral view ( Figure 4F View Figure 4 ).

Measurements

Length of body (mm): ♂ 6.0–6.8, ♀ 6.8–7.8; length of pronotum: ♂ 6.0–6.9, ♀ 6.4–7.2; length of hind femur: ♂ 3.4–3.8, ♀ 3.7–4.5.

Type material

Holotype (No. 15-0644, MFLU): ♂, Thailand, Chiang Rai (20°19 ′ 43 ′′ N, 99°51 ′ 48 ′′ E, 402.3 m altitude), 25 November 2014, collected by ZHA Ling-Sheng GoogleMaps . Paratypes: 1♂ 2♀ (No. 15-0645, 15-0646, 15-0647, MFLU) 3♂ 4♀ ( HNU), same data as holotype GoogleMaps .

Diagnosis

Thoradonta spiculobaoides sp. nov. is similar to T. spiculoba Hancock, 1912 (Zheng 2005) and T. dianguiensis Deng, Zheng and Wei 2006 , It differs from the former by: (1) vertex only 1.5–1.6 times as wide as one eye ( Figure 4A View Figure 4 ); (2) antenna inserted decidedly below lower margins of eyes ( Figure 4B View Figure 4 ), length of longest segment six times its width; (3) upper margin of hind femur with a triangular protrusion before antegenicular, antegenicular isolated and long triangular ( Figure 5B View Figure 5 ); (4) first segment of hind tarsus only 1.3–1.4 times as long as third, apices of all pulvilli sharp ( Figure 5D View Figure 5 ); (5) female size distinctly smaller. It differs from the latter by: (1) body size decidedly smaller; (2) humeral angle obtusely angled ( Figure 3B View Figure 3 ); (3) hind process of pronotum only slightly surpassing beyond top hind femora, never reaching one-third of hind tibia ( Figure 3A–C View Figure 3 ); (4) upper margin of hind femur with a triangular protrusion before antegenicular, antegenicular isolated and long triangular ( Figure 5B View Figure 5 ).