TRIGONIDIINAE Saussure, 1874

Desutter-Grandcolas, Laure, Anso, Jérémy & Jourdan, Hervé, 2016, Crickets of New Caledonia (Insecta, Orthoptera, Grylloidea): a key to genera, with diagnoses of extant genera and descriptions of new taxa, Zoosystema 38 (4), pp. 405-452 : 415

Subfamily TRIGONIDIINAE Saussure, 1874

REMARK

Trigonidiinae are not well-known in New Caledonia, perhaps because they are uncommon in forests (see Anso 2016), which have been more often sampled than open vegetation, and mostly inhabit grassland or low shrubland vegetation often resulting from human activities. Chopard (1915) and Gorochov (1986a) do not mention trigonidiines. Chopard (1970) mentions two species of the widely distributed genus Metioche Stål, 1877 , i.e. Metioche vittaticollis (Stål, 1860) and M. flavipes ( Saussure, 1878) . According to Otte et al. (1987), these two Metioche species may correspond to misidentified Trigonidomorpha sjöstedti Chopard, 1925 ; these authors actually record only two species, i.e. the widespread Trigonidomorpha sjöstedti and a new species Anaxipha caledonica Otte, 1987 .

Material at hand in MNHN collection actually attests that Trigonidiinae are represented by four genera in the archipelago: Metioche , Trigonidomorpha , Anaxipha and Amusurgus Brunner von Wattenwyl, 1893 , reported here for the first time from the Territory. Otte & Alexander (1983, tables 12 and 13) list a series of characters to identify males and females of trigonidiine genera, but these are not fully efficient to separate the genera present in New Caledonia. As suggested by Hugel (2012), this material will have to be reassessed using characters of male genitalia (see Otte & Cooper 2007), in order to fix their taxonomy with both traditional and genitalic characters. The diagnosis and list of genera given here are thus clearly preliminary.