Atlanticus (Sinpacificus) interval He, 2018

Liu, Xiao-Tong, Chen, Guang-Yu, Sun, Bi-Xuan, Qiu, Xiao-Feng & He, Zhu-Qing, 2018, A systematic study of the genus Atlanticus Scudder, 1894 from Zhejiang, China (Orthoptera: Tettigoniidae: Tettigoniinae), Zootaxa 4399 (2), pp. 170-180 : 176-177

2.8 Atlanticus (Sinpacificus) interval He sp. nov.

Holotype: 1 male, CHINA, Zhejiang Prov., Suichang, Baimashan , 9-ix-2017, coll. He Zhu-Qing.

Paratypes: 1 female, CHINA, Zhejiang Prov., Suichang, Baimashan , 9-ix-2017, coll. He Zhu-Qing ; 1 male, CHINA, Zhejiang Prov., Shaoxing , 10-viii-2017, coll. He Zhu-Qing ; 1 male, CHINA, Zhejiang Prov., Ningbo, Tiantongshan , 30-v-2015, coll. He Zhu-Qing .

Description. Pronotum saddle-shaped, disc narrower from anterior margin in 1/5, and widened gradually with the posterior margin arc, lateral lobes of pronotum deepest in middle, posterior margin oblique with central concavity, tegmen slightly shorter than length of pronotum and extending to the 5th or 6th abdominal tergum. Leg spination, fore femora with 3 interior ventral spines, middle femur with 3 external ventral spines on left and 2 on right, hind femur with 6 interior spines on outer ventral margin, fore tibiae with 4 dorsal spines on exterior margin, 6 spines on both ventral margins, middle tibiae with 6 interior spines on both margins, 2 exterior and 5 interior spines on dorsal margins, hind tibiae with 24 exterior and 21 interior spines on dorsal margins, 9 and 13 spines on ventral margins. Tenth abdominal tergite with a flat U shaped notch in median portion, cerci curved with a small apical tooth ( Fig. 3E ).

Female similar to male, tegmina covered by pronotum, but visible from lateral, ovipositor nearly straight with dorsal margin curved in basal 1/2, and ventral margin curved in basal 1/3.

Coloration. Brown, upper side of lateral lobes of pronotum black with middle brown, Sc. vein white, left tegmen with a white spot on right ( Fig. 2E ), ovipositor yellow.

Variation. External ventral spines on middle femur ranging from 0–4, interior spines on outer ventral margin of hind femur ranging from 2–3, interior spines on dorsal margins of middle tibiae ranging from 4–5.

Etymology. The new species name interval refers to the pause in the male calling song.

Measurements (in mm) male: body length 29.0–30.8, pronotum length 10.8–11.0, tegmen length 9.0–10.5, hind femur length 33.3–33.9; female: body length 30.4, pronotum length 11.4, hind femur length 33.0, ovipositor length 21.7.

Distribution. China (Zhejiang)

Song. The trill is about 17.58s with 25.36s interval . In every trill, there are about 30 chirps. Every chirp is about 0.67s with 6 pulses (individual from Baimashan). The song of individual from Shaoxing is quit different in most parameter, but there is also a long interval between two trills as the feature of this species.

Note. The new species is similar to A. (S.) fengyangensis Liu, 2013 in the shape of the cerci, but the tegmen is short. A white spot on the right of tegmen is another unique feature of this species. Song is very special with long interval , which makes it very difficult to catch.

Figures

FIGURE 2. Atlanticus spp. in living condition: A—A. magnificus; B—A. pieli; C—A. fengyangensis; D—A. fallax; E—A. interval; F—A. huangshanensis.

FIGURE 3. Tenth abdominal tergum and cerci in dorsal view: A—A. magnificus; B—A.pieli; C—A. fengyangensis; D—A. fallax; E—A.interval.