Ceraeocercus fuscipennis, Uvarov, 1910

Liu, Fei, Chobanov, Dragan Petrov, Chen, Liusheng & Liu, Chunxiang, 2019, Ceraeocercus Uvarov, a genus recorded in China for the first time (Orthoptera, Tettigoniidae; Tettigoniinae; Drymadusini), Zootaxa 4608 (3), pp. 586-592 : 588-590

Ceraeocercu s fuscipennis fuscipennis Uvarov, 1910 New record for China

( Fig. 1 – 4 )

Ceraeocercus fuscipennis fuscipennis Uvarov, 1910 . Hor. Soc. ent. Ross. 39:382; Karabağ, 1961. Bull. Br. Mus. (Nat. Hist.) Ent. 11 (1): 1 – 41, 136; Pravdin, 1987. Ent. Rev. 66:81 – 91; KoЗak & Kemal, 2010. Cent. Ent. Stud. Misc. Pap. 154:3; Pokivailov, 2017. Ent. Rev. 97(4):491.

Type locality: Inder Lake in Uralsk Region (now Atyrau Province in Kazakhstan) .

Material examined: 3 males, China: Xinjiang: Qinghe. 1967. VI.28, Coll. Yonglin Chen ; 3 males, 3 females, China: Xinjiang: Qinghe. 1967. VII.10, Coll. Weishan Shen ; 1 male, 2 females, China: Xinjiang: Qinghe. 1975. VI.5, Coll. Yabang Sun.

Diagnosis. This subspecies differs from C. fuscipennis hindukushanus by length of tegmina and coloration of hind wings. Pronotum narrowing in prozona ( Fig. 1c ); tegmina not exceeding knee of hind femora, with rounded margins ( Fig. 1b ); hind wings dark blackish brown, reduced. In the latter species, tegmina extend beyond hind knee, and hind wings are brown with lighter fenestration.

Redescription. Pronotal disc narrowing from base to middle part, with straight anterior margin and an indistinct broadly obtuse concavity in middle ( Fig. 1c ); first transverse sulcus distinct; median sulcus distinctly V-shaped, interrupted by a median line.

Male. Stridulatory file composed of about 49 – 50 widely-arranged teeth, which gradually become smaller from proximal one third part towards both ends ( Fig. 2b ). Male right stridulatory area with irregularly pentagonal mirror ( Fig. 2a ). Fore coxae armed with a fine spine. Fore femora armed with 4 small ventro-anterior spines; fore tibiae with 6 ventro-anterior, 6 ventro-posterior and 3 dorso-posterior spines. Mid femora with 3 – 4 small ventro-anterior spines; mid tibiae with 6 ventro-posterior, 6 ventro-anterior and 4 dorso-anterior spines. Hind femora armed with 7 – 8 small ventro-posterior and 9 – 10 ventro-anterior spines, hind tibiae with numerous spines on each margin plus 2 spurs on each dorsal margin. Epiproct covered by tenth abdominal tergum ( Fig. 3a ). Cercus up and in-curved and not exceeding subgenital plate ( Fig. 3c ). Subgenital plate with a long and narrow central “V”-shape cleft in apical half, with conical and obtuse stylus ( Fig. 3d ).

Female ( Fig. 4a – d ): Last tergum split into two broadly triangular pointed lobes, with a sharply angular notch between. Epiproct tongue-shaped, visible. Cercus long, conical, regularly incurved, not branched. Ovipositor slen- der, with slightly enlarged base. Subgenital plate trapezoidal with distinct mid carina and widely triangular notch at apex.

Coloration. Pronotum pale brown; lateral lobes with dark brown dorsal margin, and creamy-brown ventral margin. Tegmina creamy-brown with scattered creamy-white and brown spots. Hind wings brown with lighter fenestration. Fore and middle femora uniformly light brown, hind femur light brown with brown marbled upper edge and a series of brown spots along middle of outer surface. Each tarsus with dark brown ventral surface.

Measurement (mm). Length of body: male 33.5 – 41.9, female 36.6 – 44.8; length of pronotum: male 8.7 – 9.7, female 9.4 – 10.4; length of tegmen: male 27.7 – 29.9, female 29.5 – 32.9; width of tegmen: male 6.4 – 7.6, female 7.0 – 8.5; length of fore femur: male9.2 – 10.2, female 9.8 – 10.7; length of middle femur: male 10.4 – 11.3, female 11.3 – 12.1; length of hind femur: male 26.3 – 30.6, female 29.4 – 31.5; length of ovipositor: 24.9 – 28.4.

Song. The calling song consisted of stereotyped echemes with a regular period ( Fig. 5a – d ). The frequency of main peak is about 10.32 kHz ( Fig. 5d ). Each echeme was comprised of 4 syllable groups ( Fig. 5c ). The important parameters are listed ( Tab. 1 ).

Distribution. China, Xinjiang; Kazakhstan; Tajikistan; Turkmenistan.

Figures

FIGURE 1a–d. Ceraeocercus fuscipennis fuscipennis. a: Habitus of the male in dorsal view; b: habitus of the male in lateral view. c: head and pronotum in dorsal view; d: head and lateral lobe of pronotum in lateral view.

FIGURE 2a–b. Stridulatory apparatus of Ceraeocercus fuscipennis fuscipennis. a: mirror on right tegmen; b: Stridulatory file on underside of male left tegmen.

FIGURE 3a–d. The male of Ceraeocercus fuscipennis fuscipennis. a: last abdominal tergum in dorsal view; b: right cercus in lateral view; c: abdominal apex in ventral view; d: subgenital plate in ventral view.

FIGURE 4a–d. The female of Ceraeocercus fuscipennis fuscipennis. a: abdominal apex including ovipositor in lateral view. b: last abdominal tergum in dorsal view; c: subgenital plate in ventral view; d: abdominal apex in lateral view.

FIGURE 5a–d. Ozillogramms of calling songs of Ceraeocercus fuscipennis fuscipennis. a: scheme series during 2S; b: syllable series during 300 milliseconds; c: scheme series (showing syllables per scheme) during 80S; d: power spectrum of the calling song.