Atlanticus (Sinpacificus) jiangyei, Cheng, Kun, Wang, Xue-Song, Liu, Chun-Xiang & Wu, Chao, 2016

Cheng, Kun, Wang, Xue-Song, Liu, Chun-Xiang & Wu, Chao, 2016, Description of two new species of the genus Atlanticus from Southern China and their songs (Orthoptera: Tettigoniidae; Tettigoniinae), Zootaxa 4103 (5), pp. 473-480: 474-478

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Atlanticus (Sinpacificus) jiangyei

sp. nov.

Atlanticus (Sinpacificus) jiangyei  sp. nov. Liu, Wang & Cheng

(Figs. 1 A, C, E; 2 A, C, E, F; 3 A –C, G) Orthoptera 476677

Holotype. Male (No. JF 332), China: Jiangsu Prov.: Park of Chanzhou City, 2014. VII. 7, Coll. Jiangye.

Paratype. 4 males (No. JF 333), 1 female (No. JF 334, 336, 342, 371), same data as in holotype.

Diagnosis. Large-size compared to the congeners in the pieli  group of the subgenus Sinpacificus. Proximal three quarters of stridulatory file on underside of left tegmen with 73 distinct stridulatory teeth which gradually becoming larger towards basal quarter (Fig. 1 A). Mirror length and width (2.2mm, 2.0mm) (Fig. 1 C). Greatest length of secondary mirror (3.8mm), smallest length of secondary mirror (2.0 mm) (Fig. 1 C).

Description. Holotype. Male. Disc of prozona slightly convex, and metazona approximately flat caudad. Narrowest in first transverse sulcus or at basal one sixth, and then gradually amplified caudad. Lateral lobes of pronotum deepest in middle; anterior margin very slightly concave, posterior margin oblique with a very indistinct central concavity, ventral margin slanting caudad to posterior angle. Tegmen amplified, extending to the seventh abdominal tergum. Tegmen with clear longitudinal and cross veins; radial vein giving out two branches in apical one third part, median vein flat dorsal and lateral planes at right angles to each other; lateral plane deepest in apical quarter (Fig. 1 E).

Leg spination. Fore femora with 2 interior ventral spines. Middle femur with 3 external ventral spines. Hind femur with 5 interior spines on ventral margin. Fore tibiae with 4 dorsal spines on exterior margin and 6 ventral spines on both margins; middle tibiae with 6 ventral spines on both margins, 5 exterior and 3 interior spines on dorsal margins; hind tibiae with 19 exterior and 22 interior spines on dorsal margins.

Tenth abdominal tergum with a long and narrow central “V”-shape cleft in apical two thirds (Fig. 2 A). Cerci robust, short, of even width to small uncinate internal tooth in basal one-third area, and then gradually constricted and slightly incurved, with a bluntly pointed tooth. Subgenital plate with a wide “U”-shaped notch between styli; notch slightly longer than half length of styli (Fig. 2 C).

Female (Figs. 2 E, F). Tenth abdominal tergum with a slight central “V”-shaped notch. Cerci conical, with obtuse apex. Apical margin of subgenital plate with a very tiny wide “U”-shaped emargination (Fig. 2 E). Ovipositor moderately long, straight, apical half recurved, with apex obliquely truncated (Fig. 2 F).

Coloration. Generally brown, with yellow ventral surface of abdomen. Lateral surface of tegmen dark brown. The following parts shining blackish brown: lateral surfaces of fastigium of vertex; basal and apical quarter of each lateral lobe of pronotum with exception of the white lower stripe; basal one third radial areas between radial and subcostal veins; lateral surface of fore femur, and basal stripe of dorsal surface of fore femur; discontinuous spots between upper and lower halves of hind femur. Lower one third part of dorsal surface of tegmen brown. Stripe in lower quarter area of lateral lobe of pronotum and costal area of tegmen white.

Measurement (mm). Length of body: male 30.1, female 31.1; length of pronotum: male 11.35–11.62, female 10.01–10.93; width of pronotum: male 5.93–6.59, female 5.71–6.09; length of fore femur: male 8.3, female 8.1; length of middle femur: male 9.0, female 9.5; length of hind femur: male 27.90–29.69, female 27.96–30.30; length of tegmen: male 17.12, female 5.56–6.38; width of tegmen: male 5.55, female 2.32–2.62; length of ovipositor: 16.22–17.45; width of ovipositor 2.72–3.4.

Song (Figs. 3 A –C, G). The calling song consists of regular repeated units or echeme series (Figs. 3 A –C). The frequency ranges from 6 to 22 kHz, and the frequency of main peak is about 10.5 kHz (Fig. 3 G). Each phrase consists of numerous syllables. The important parameters are listed (Table 1).

TABLE 1. Sοng parameters οf Atlanticus (Sinpacificus)  species (N∶ number οf individuals, n∶ number οf measurements, mean ± sd, minimum-maximum).

PLATE 1. (A –E) Stridulatory apparatus of Atlanticus (Sinpacificus)  species. (A, C, E) Atlanticus (Sinpacificus) jiangyei  sp. n.; (B, D, F) Atlanticus (Sinpacificus) helleri  sp. n.. (A, B) Stridulatory file on underside of male left tegmen; (C, D) Mirror on right tegmen; (E, F) Stridulatory apparatus on left tegmen.

Notes. The new species belongs to the Pieli  species group in Tinkham (1941). It most resembles A. (S.) huangfu Liu  in the comparative long tegmen, but distinctly differs from A. (S.) huangfu  and other congeners in the Pieli  group by the coloration, number of stridulatory teeth, area of male mirror, and details of male and female abdominal apex such as shape of notch of male tenth abdominal tergum, shape of notch of male subgenital plate, and short female ovipositor.

Etymology. The new species is named after Mr. Jiang Ye in Jiangsu Province in China for his contribution to the collection of Tettigoniidae  .

Distribution. China (Jiangsu).

PLATE 2. Abdominal apex of Atlanticus (Sinpacificus)  species. (A, C, E, F) Atlanticus (Sinpacificus) jiangyei  sp. n.; (B, D) Atlanticus (Sinpacificus) helleri  sp. n.. (A, B) Male tenth abdominal tergum in dorsal view; (C, D) Male subgenital plate in ventral view; (E) Female subgenital plate in ventral view; (F) Female abdominal apex including ovipositor in lateral view.

PLATE 3. Ozillogramms of calling songs of Atlanticus (Sinpacificus)  species (A –F). Sonogramm (right) and power spectrum (left) of the calling song of Atlanticus (Sinpacificus)  species (G –H). (A –C, G) Atlanticus (Sinpacificus) jiangyei  sp. n.; (D –F, H) Atlanticus (Sinpacificus) helleri  sp. n.. (A, D) scheme series during 5 S; (B, E) scheme series (showing syllables per scheme) during 1 S; (C, F) syllable series during 100 milliseconds.