Zebragryllus Desutter-Grandcolas & Cadena-Castañeda, 2014

Tavares, Gustavo Costa, Oya, Beatriz Harumi Kondo, Cadena-Castañeda, Oscar J., Oliveira, Marcus Paulo Alves de & Castro-Souza, Rodrigo Antônio, 2024, New species and records of Zebragryllus Desutter-Grandcolas & Cadena-Castañeda, 2014 (Orthoptera: Gryllidae: Gryllinae) from the Brazilian Amazon rainforest, European Journal of Taxonomy 932, pp. 82-111 : 85-86

Genus Zebragryllus Desutter-Grandcolas & Cadena-Castañeda, 2014

Key to males of species of Zebragryllus Desutter-Grandcolas & Cadena-Castañeda, 2014 (adapted from Desutter-Grandcolas et al. (2014))

1. Species with fore and mid legs black and white ............................................................................... 5

– Species without contrasted coloration on the fore and mid legs ...................................................... 2

2. Hind femora completely ochre, brown, dark brown, or blackish, but without white marks ............ 3

– Hind femora with only some whitish bands along its outer margin and close to its base .................. ....................................................................... Zebragryllus intermedius Desutter-Grandcolas, 2014

3. All femora ochre, tegmina short, not surpassing the fourth tergite .................................................. 4

– Fore and mid legs all blackish or dark brown. Tegmina well-developed, covering the subgenital plate tip ............................................................................................. Z. fuscus Desutter-Grandcolas, 2014

4. Tegmina without stridulatory apparatus .... Z. aphonus Tavares, Oya & Cadena-Castañeda sp. nov.

– Tegmina with stridulatory apparatus .... Z. mebengokre Tavares, Oya & Cadena-Castañeda sp. nov.

5. Very small species with light ochre hindlegs, making the contrasted coloration less clear. Genitalia with lateral lophi hidden under pseudepiphallic sclerite .......... Z. nauta Desutter-Grandcolas, 2014

– Medium-sized species with a black and white ‘zebra’ pattern. Genitalia with lateral lophi not hidden under pseudepiphallic sclerite............................................................................................................ 6

6. Base of antennae brown (scape +about 30 antennomeres), followed by a short white ring of about ten antennomeres. Maxillary palpi dark brown, fourth joint white .................................................... ............................................................................................. Z. nouragui Desutter-Grandcolas, 2014

– Base of antennae white. Maxillary palpi dark brown, fourth joint lighter only dorso-basally ......... 7

7. Harp with 2–4 veins; genitalia with lophi ‘foliaceous’ ..... Z. guianensis Desutter-Grandcolas, 2014

– Male harp with two veins; genitalia with lophi sub-conical ............................................................... ............................................................ Z. wittoto Desutter-Grandcolas and Cadena-Castañeda, 2014

Key to females of species of Zebragryllus Desutter-Grandcolas & Cadena-Castañeda, 2014 (adapted from Desutter-Grandcolas et al. (2014))

1. Species with fore and mid legs black and white; abdomen also black and white (little contrasted in the light brown Z. nauta Desutter-Grandcolas, 2014 ) ...................................................................... 3

– Species without contrasted coloration on the fore and mid legs. Abdomen without distinct white tergites ............................................................................................................................................... 2

2. Hind femora completely ochre, without white marks. Tegmina reaching up to the first abdominal tergite ....................................... Zebragryllus aphonus Tavares, Oya & Cadena-Castañeda sp. nov.

– Hind femora brown with only some whitish bands along its outer margin and close to its base. Tegmina very short, mostly covered by pronotum ......... Z. intermedius Desutter-Grandcolas, 2014

3. Very small species with light ochre hindlegs, making the contrasted coloration less clear. Forewings quite long for the genus, overlapping on the anal area, with many cells between longitudinal veins; third and fourth (partially) tergites lighter than the others but not contrastingly white ........................................................................................ Z. nauta Desutter-Grandcolas, 2014

– Medium-sized species with a black and white ‘zebra’ pattern. Fore wings absent or short, not reaching the first abdominal tergite .................................................................................................. 4

4. Base of antennae brown (scape +about 30 antennomeres), followed by a short white ring of about 10 antennomeres. Short and slightly overlapping forewings; abdomen dark brown, metanotum and third tergite with a wide transverse and continuous white stripe ........................................................ ............................................................................................. Z. nouragui Desutter-Grandcolas, 2014

– Base of antennae white. Apterous or with shorter forewings; abdomen coloration different .......... 5

5. Apterous; posterior margin of metanotum with a white semicircular band covering part of the first tergite anterior margin. Fourth to sixth tergites white in their anterior two/third, except on a short medio-dorsal line, black .................................................... Z. guianensis Desutter-Grandcolas, 2014

– Forewings short, not overlapping; metanotum with a white half ring and a pair of faint whitish bands on fourth and fifth tergites .................... Z. wittoto Desutter-Grandcolas & Cadena-Castañeda, 2014