Gorochovitettix khaosung Tan & Artchawakom,

Tan, Ming Kai & Artchawakom, Taksin, 2015, A new species from the genus Gorochovitettix (Tetrigidae: Metrodorinae) from Thailand, Zootaxa 3990 (3), pp. 444-450: 446-449

publication ID

http://dx.doi.org/10.11646/zootaxa.3990.3.9

publication LSID

lsid:zoobank.org:pub:E3045A70-F83A-4CAA-811D-B96214600E42

persistent identifier

http://treatment.plazi.org/id/4D437F22-1760-FF85-AEAB-FDB4F1E9EC6B

treatment provided by

Plazi

scientific name

Gorochovitettix khaosung Tan & Artchawakom
status

new species

Gorochovitettix khaosung Tan & Artchawakom  , new species

( Figs. 1View FIGURE 1 and 2View FIGURE 2)

http://lsid.speciesfile.org/urn:lsid: Orthoptera  .speciesfile.org:TaxonName: 470576

Material examined. Holotype (male): Thailand, Nakhon Ratchasima, Sakaerat Biosphere Reserve, “Khao Sung” Silvicultural Station, primary dry evergreen forest, on tree trunk, N 14.49460, E 101.87271, 662.8 ± 5.9 m, 26 June 2014, coll. M. K. Tan, H. Yeo & S. T. Toh ( SERS. 14.73) ( ZRC).

Paratypes: 1 male, 1 female. Same locality and environments as holotype: male ( SERS. 14.72), N 14.49460, E 101.87271, 662.8 ± 5.9 m, 26 June 2014, coll. M. K. Tan, H. Yeo & S. T. Toh; female ( SERS. 14.66), N 14.49489, E 101.87122, 624.7 ± 8.1 m, 26 June 2014, coll. M. K. Tan, H. Yeo & S. T. Toh (all in ZRC).

Diagnosis. This species differs from Gorochovitettix kannackiensis Storozhenko & Pushkar, 2015  by the set of unique charactrs: median carina of fastigium strongly produced in front of anterior margin of fastigium; male and female subgenital plate rather slender and elongated; female subgenital plate with posterior margin of plate truncated with a distinct median lobe. Male morphometric also differs by: MAL/MAW = 8.9 (instead of 5.5–6.1); SW/ 1 stAW = 2.0 (instead of 2.1–2.4); TL/TW = 2.9 (instead of 3.1–3.6); MFL/ MFW = 2.6 (instead of 2.7); SGPL / SGPW = 1.6 (instead of 1.2–1.3). Female morphometric also differs by: MAL/MAW = 7.0 (instead of 5–6); VW/EW = 2.0 (instead of 1.4); SW/ 1 stAW = 2.4 (instead of 2.5); MFW /TW = 2.1 (instead of 2.3–2.7); FFL/FFW = 2.9 (instead of 2.1–2.3); HFL/ HFW = 2.9 (instead of 3.1–3.2); OVDL / OVDW = 5.2 (instead of 3.6–3.7); OVVL / OVVW = 5.4 (instead of 6.5–7.8).

Description. Male. Body medium sized for Tetrigidae  in general ( Figs. 1View FIGURE 1 A, 1 C). Antennae filiform, 15 -segmented; antennal bases below the level of lower margin of eyes; mid antennal segments 8.9 times (n = 2) as long as wide. Eyes not protruding above vertex in lateral view. Lateral ocelli placed near the level of lower margins of eyes ( Fig. 2View FIGURE 2 A). Fastigium of vertex with deep concavities behind lateral carinae, not produced in front of eyes from dorsal aspect, 1.5 times (n = 2) wider than width of one eye from above ( Fig. 2View FIGURE 2 B); anterior margin of fastigium truncated, median carina of fastigium strongly produced in front of anterior margin of fastigium ( Fig. 2View FIGURE 2 B); lateral carinae elevated; subocular lobes distinct. Frontal ridge (or scutellum) in anterior view forms a shallow concavity; in lateral view distinctively produced to form two broadly rounded lobes with shallow excision between the lobes; the two lobes are of about equal height ( Fig. 2View FIGURE 2 C). Width of frontal ridge between eyes 2.0 times (n = 2) more than width of scapus. Pronotum finely nodulose near the anterior half and more punctuated towards the apical half, well surpassing apex of abdomen ( Figs. 1View FIGURE 1 A, 1 B); in dorsal view anterior margin of pronotum slightly concave; posterior process of pronotum reaching one thirds to half of hind tibiae, in dorsal view process with truncated apex ( Fig. 2View FIGURE 2 D). Median carina of pronotum substraight in profile ( Fig. 2View FIGURE 2 D). Lateral carinae of pronotum in prozona well defined, parallel to feebly converging posteriorly. Hind margin of lateral lobes of pronotum bisinuate, tegminal (dorsal) sinus less deep than lower sinus; lower part of lateral lobe directed laterally; posterior angles of lateral lobes in dorsal view obliquely truncated ( Fig. 2View FIGURE 2 C). Tegmina rudimentary, elongated oval with apical margin rounded; 2.9 times (n = 2) longer than wide; visible part of tegmen 2.3 times (n = 2) less wide than mid femur ( Fig. 2View FIGURE 2 C). Hind wings long, barely surpassing apex of pronotum. Fore and mid femora considerably compressed laterally to form leaf-like carinae; upper carinae broadly rounded and gently serrated, lower carinae feebly sinuate and serrated ( Figs. 2View FIGURE 2 E, 2 F). Fore femur 2.2 times (n = 2), mid femur 2.6 times (n = 2) as long as wide. Hind femur slender, 3.1 times (n = 2) as long as wide; upper and lower carinae on the external surface also finely serrated; lower carinae on the inner surface with a spine-like peg near the coxa. Upper side of hind tibia with 5 outer and 5 inner spines (n = 2); with minute denticles between spines. Length of first tarsal segment of hind legs 0.9 times (n = 2) the length of third segment (without claws) ( Fig. 2View FIGURE 2 G).

Subgenital plate in ventral view rather slender and elongated, about 1.6 times (n = 2) longer than wide, with apex of plate excised ( Fig. 2View FIGURE 2 H); in lateral view broad and elongated ( Fig. 2View FIGURE 2 I). Cerci stout basally with pointed apex ( Fig. 2View FIGURE 2 I).

Colouration. Body yellow brown, with few blackish and light brown patterns on pronotum and legs. Head brown with a tint of green ( Fig. 2View FIGURE 2 A). Antennae light brown basally, darken to brown or dark brown apically. Dorsal plate of pronotum yellow brown with black and light brown patterns. Lateral lobes of pronotum, darker brown dorso-anteriorly and light brown ventrally ( Fig. 2View FIGURE 2 C). Fore and mid legs pale yellow brown, with very faint darken oblique rings. First segment of fore and mid tarsi brown, third segment with whitish base and black apex; claws brown. Hind femora pale yellow brown with some black patterns; ventrally black ( Fig. 1View FIGURE 1 A). Hind tibiae dark brown, with blackish rings near base and the middle. First and second segment of hind tarsus brown, third segment with light brown base and blackish apex; claws brown. Abdomen from above blackish with two light brown longitudinal stripes.

Female. Similar to male, but larger. Mid antennal segments 7.0 times (n = 1) as long as wide. Fastigium of vertex 2.0 times (n = 1) wider than width of one eye from above. Width of frontal ridge between eyes 2.4 times (n = 1) more than width of first antennal segment. Tegmen 3.2 times (n = 1) longer than wide. Visible part of tegmen 2.1 times (n = 1) less wide than mid femur. Fore femur 2.9 times (n = 1), mid femur 2.9 times (n = 1) as long as wide. Hind femur slender, 2.9 times (n = 1) as long as wide. Upper side of hind tibia with 5 outer and 5 inner spines (n = 1). Length of first tarsal segment of hind legs 0.9 times (n = 1) as long as that of third segment (without claws).

Subgenital plate 1.7 times (n = 1) longer than broad; posterior margin of plate truncated with a distinct median lobe ( Fig. 2View FIGURE 2 J). Cerci same as male. Valves of ovipositor narrow, dentate. Upper valve of ovipositor 5.2 times (n = 1) longer than its maximum width. Lower valve of ovipositor 5.4 times (n = 1) longer than its maximum width; apical tooth curved downward ( Fig. 2View FIGURE 2 K).

Colouration. Body, head and legs generally similar coloured, but darker than males ( Figs. 1View FIGURE 1 B, 1 D). Ovipositor dark brown, with apices of denticles red brown ( Fig. 2View FIGURE 2 K).

Measurements. See Table 1.

Etymology. This species is named after the type locality “Khao Sung” Silvicultural Station; noun in apposition. Life history. This species was found to inhabit tree trunks in primary dry evergreen forest.

TABLE 1. Measurements (in mm) and counts of Gorochovitettix khaosung sp. n.

  SERS.14.72     SERS.14.73   SERS.14.66
      OVDW      
      OVVW      
ZRC

Zoological Reference Collection, National University of Singapore

MFW

Museum Freriks

HFW

Herbarium Filicium