Ducetia japonica (Thunberg, 1815)

Nagar, Rajendra, Swaminathan, R. & Mal, Jhabar, 2015, Some common and less known Phaneropterinae (Orthoptera: Tettigoniidae; Phaneropterinae) with the description of a new species from India, Zootaxa 4027 (3), pp. 301-340 : 318

Ducetia japonica (Thunberg, 1815)

( Fig. 9 ; Plate XIII)

http://lsid.speciesfile.org/urn:lsid: Orthoptera .speciesfile.org:TaxonName:9936

Material examined. (47 Specimens, 30♂ & 17♀) India (Tamil Nadu; Kerala; Meghalaya): North Khasi Hills, Ribhoi; 2.vi.2013, Coll. Rajendra Nagar (Mawbri); 2.vi.2013, Coll. Rajendra Nagar (Mawflang); 3.vi.2013, Coll. Rajendra Nagar (Umiam) (2); 3.vi.2013, Coll. Rajendra Nagar ( RRTC) (2); 3.vi.2013, Coll. Jhabar Mal (Umiam) (3); 3.vi.2013, Coll. R. Swaminathan (Umiam, NEH) (2); 4.vi.2013, Coll. Jhabar Mal (Umiam); 4.vi.2013, Coll. Rajendra Nagar (Umiam) (5); 4.vi.2013, Coll. R. Swaminathan (Umiam) (3); 5.vi.2013, Coll. Rajendra Nagar (Umiam); 5.vi. 2013, Coll. Rajendra Nagar (Jowai); 5.vi.2013, Coll. (Dawki); 5.vi.2013, Coll. Jhabar Mal (Umiam); 6.vi.2013, Coll. Rajendra Nagar (Umiam) (2); 6.vi.2013, Coll. Rajendra Nagar (Dawki); 6.vi.2013, Coll. R. Swaminathan (Umiam); 6.vi.2013, Coll. Jhabar Mal (Umiam) (4); 7.vi.2013, Coll. Rajendra Nagar (East Khasi Hills) (4); 8.vi.2013, Coll. R. Swaminathan (Umiam) (2); 9.vi.2013, Coll. Rajendra Nagar (Boirymbong); 21.i.2014, Coll. Rajendra Nagar (Thiruvananthapuram); 19.i.2014, Coll. Rajendra Nagar ( TNAU, Coimbatore) (3); 21.i.2014, Coll. Jhabar Mal (Thiruvananthapuram) (3).

Male: Stridulatory file with about 150 teeth, which are rather small and almost equally spaced throughout. Tenth abdominal tergite with apical margin sub-truncate, cerci strongly curved with interno-ventral ridge at apex. Venation in forewings: radius almost always with 4–6 closed parallel posterior branches. Sub-genital plate deeply furrowed with narrow hind notch, bifurcate with contiguous lobes, without styli, split into two parallel lobes in the apical quarter to apical third; internal surface with spinules dorsad. Pro-femur with 3–5 external, 5–6 internal spines; meso-femur with 8–10 external, one internal spine; post-femur 8–11 external, 1–2 internal spines. Pro and meso-tibiae each with 4 apical, meta-tibiae with 6 apical spurs and with the following numbers of spines: pro-tibia with 3–4 external, 4–6 dorso-internal; 10–11ventro-external, 12–13 ventro-internal; meso-tibiae with 7–9 dorsoexternal, 9–11 dorso-internal; posterior tibia on dorsal margins with numerous large spines mixed with small spinules, usually space between 2 large spines filled with 2–4 spinules, spines on ventral margins scarce near base, spaced closely towards apex.

Female: Epiproct triangular, apex sub-acute, cerci strongly curved; sub-genital plate triangular not with a deep medial furrow; ovipositor relatively narrow bent almost semi-circularly upward; apical parts of lower and upper margin finely serrate.

Figures

FIGURE 9. Ducetia japonica (Thunberg, 1815) Male 1 – 4: 1. Tegmina; 2. Stridulatory file on left tegmina; 3. Lateral view of left cerci; 4. Ventral view of sub-genital plate; Female 5 – 6 5. Lateral view of ovipositor; 6. Ventral view of subgenital plate.