Nannogryllacris Karny, 1937

Hugel, Sylvain, 2009, Gryllacrididae and Tettigoniidae (Insecta, Orthoptera, Ensifera) from Espiritu Santo, Vanuatu, Zoosystema 31 (3), pp. 525-576 : 542-544

publication ID	https://doi.org/ 10.5252/z2009n3a10
DOI	https://doi.org/10.5281/zenodo.5470626
persistent identifier	https://treatment.plazi.org/id/F305FD2C-C21F-E82F-FD27-1C68BB20FBE2
treatment provided by	Marcus
scientific name	Nannogryllacris Karny, 1937
status

Treatment

Genus Nannogryllacris Karny, 1937 View in CoL ( Figs 5-7 View FIG View FIG View FIG )

Nannogryllacris Karny, 1937: 133 View in CoL .

TYPE SPECIES. — Gryllacris exigua Brunner von Wattenwyl, 1888 .

DIAGNOSIS (IN ADDITION TO THE ABOVE- MENTIONED CHARACTERS SHARED WITH AMPHIBOLOGRYLLACRIS ). — Size: small; body length: 12.5-20 mm; FIII: 6.2-12 mm; FW: 9-17 mm. Colour: light brown, without clear black drawings (neither on face, pronotum, abdomen, legs); FW veins concolourous with the FW cells. Cerci usually reduced, not much longer than male styli. Mesosternum and metasternum lobes rounded.

REMARKS

This genus and the five species belonging to it are omitted in Otte (2000).

Nannogryllacris niaoulii Kaltenbach, 1968 View in CoL is often omitted in available databases.

Karny (1937) considered Amphibologryllacris View in CoL and Nannogryllacris View in CoL as extremely closely related and gave only colour characters to distinguish them.

TENTATIVE KEY TO ADULT NANNOGRYLLACRIS KARNY, 1937 SPECIES Abdominal apex is lacking in N. exigua ( Brunner von Wattenwyl, 1888) .

1. FW with M not visible on the base, fused with R from the base to the FW proximal third ( Fig. 7A View FIG ); male cerci not longer than styli ( Fig. 6J View FIG ); female SGP preceding sternite with a cuneiform posterior projection ( Fig. 6D View FIG ); ovipositor shorter than FIII ......... ............................................................................................................. N. novaguineae View in CoL

— FW with M visible on the base, sometimes lying in contact to R, sometimes anastomosed with R ( Fig. 7 View FIG C-E); male only known in N. niaoulii ( Kaltenbach, 1968) View in CoL without styli; when known, female SGP preceding sternite unmodified or with a lobiform or furciform appendice, not with a cuneiform appendice; ovipositor shorter, as long as, or longer than FIII ........ 2

2. FW with Cu simple (not furcated, Fig. 7C, E View FIG ); head without conspicuous ocelli; when known, SGP preceding sternite unmodified; when known, male SGP without styli; when known, ovipositor much (c. ⅓) longer than TIII ........................................................ 3

— FW with furcated Cu ( Fig. 7B, D View FIG ); head with or without conspicuous ocelli; ♂ unknown; female SGP preceding sternite with a lobiform or a furciform projection; ovipositor at most as long as TIII .................................................................................................... 4

3. FW with 4 A veins ( Fig. 7C View FIG ); frons wide ( Fig. 6C View FIG ); ovipositor ⅓ longer than FIII ........ .................................................................................................................... N. niaoulii View in CoL

— FW with 5 A veins ( Fig. 7E View FIG ); frons relatively narrower ( Fig. 6B View FIG ); ovipositor unknown ...................................................................................................................... N. exigua View in CoL

4. FW with Cu at least furcated 3 times (at least 4 terminal branches; Fig. 7B View FIG ); head with conspicuous ocelli ( Fig. 6A View FIG ); female SGP preceding sternite furciform ( Fig. 6K View FIG ); ovipositor as long as FIII ......................................................................................... N. furciventris View in CoL

— FW with Cu furcated 1 time (2 terminal branches; Fig. 7D View FIG ); head without conspicuous ocelli; female SGP preceding sternite lobiform ( Fig. 6F View FIG ); ovipositor distinctly shorter than FIII .............................................................................................................. N. heurnii View in CoL