Bidentatettix Zheng, 1992

Muhammad, Amira Aqilah, Tan, Ming Kai, Abdullah, Nurul Ashikin, Azirun, Mohammad Sofian, Bhaskar, Dhaneesh & Skejo, Josip, 2018, An annotated catalogue of the pygmy grasshoppers of the tribe Scelimenini Bolívar, 1887 (Orthoptera: Tetrigidae) with two new Scelimena species from the Malay Peninsula and Sumatra, Zootaxa 4485 (1), pp. 1-70 : 19

Genus Bidentatettix Zheng, 1992

Bidentatettix: Zheng 1992, 2005 , Otte 1997, Liang & Zheng 1998, Deng et al. 2007, Storozhenko & Paik 2011, Deng 2016, Zha et al. 2017.

Type species: Bidenttettx yunnanensis Zheng, 1992 .

Composition and distribution. Two species, one in NW Vietnam ( B. gorochovi ) and one in S Yunnan ( B. yunnanensis ).

Notes. The genus was established for B. yunnanensis Zheng, 1992 from Xishuangbanna (PR China), characteristic in toothed carinae, toothed femora and high horns made of lateral and transversal carinae of the vertex. Described in the same year from Son La ( Vietnam), only about 300 km east to Xishuangbanna, B. gorochovi ( Podgornaya, 1992) was moved from the genus Tettilobus to Bidentatettix by Storozhenko & Paik (2011). The two species could be synonymous but closer examination is needed. Described from Nilgiris ( India: Tamil Nadu), Gavialidium carli Hebard, 1930 comb. resurr. is a member of the genus Gavialidium , very close to the type species of the genus ( G. crocodilum ), and very likely not a member of the genus Bidentatettix (as according to Storozhenko & Paik 2011). This is based on G. carli having less dentate carinae and femora very similar to that of G. crocodilum (see Hebard 1930: Figs 3 , 4 ), and on the distribution gap between Bidentatettix and Gavialidium— of about 3000 km. The genera Bidentatettix , Gavialidium , and Tegotettix are very similar morphologically. Despite of the previous attempts to classify the genus as Cladonotinae (e.g. Storozhenko & Paik 2011, Zha et al. 2017), it is very close to Tegotettix (its type species, T. armatus ), Paragavialidium and Gavialidium and is thus a true Scelimenini member.

Figures

FIGURE 3. Scelimena marta sp. nov. female holotype, habitus in dorsal (A) and lateral view (B), face in anterior view (C), and hind tarsus (D) in lateral view. Scale bars of A and B 5 mm, of C 2 mm, and of D 0.5 mm. Photographs by Josip Skejo & Dhaneesh Bhaskar.

FIGURE 4. Scelimena marta sp. nov. male paratype (PT1), habitus in dorsal (A) and lateral view (B), and anterior half of the body in lateral view (C). Scale bars of A and B 5 mm, of C 2 mm. Photographs by Josip Skejo & Dhaneesh Bhaskar.