Cryncus, Gorochov, 1983

Nyobe, Philene Corinne Aude Um, Kekeunou, Sevilor, Ma, Libin, Robillard, Tony, Simeu-Noutchom, Alain & Bilong, Charles Felix Bilong, 2021, Description and bioecology of two new species of the genus Cryncus (Orthoptera Gryllidae, Gryllinae) from Cameroon with a key and distribution map of all African species, Zootaxa 4908 (4), pp. 473-488 : 481-482

Key for the species of Cryncus

This key is produced from morphological characters and excludes C. pugu which is only known by its song.

1a. Mirror absent............................................................................... C. massarti .

1b. Mirror present....................................................................................... 2

2a. Fore wings with 3 oblique veins............................................................... C. pulchellus .

2b. Fore wings with more than 3 oblique veins................................................................ 3

3a. Short ovipositor less than 6mm .......................................................................... 4

3b. Long ovipositor more than 6mm ........ .................................................................. 5

4a. Very short ovipositor (1,3 mm).................................................................. C. dmitrievi .

4b. Short ovipositor (4-4.5 mm)….............. ..................................................... C. olsufievi .

5a. Anterior tibia with a large oval tympanum on outer face, and a small round tympanum on inner face…............... ...6

5b. Anterior tibia with a large oval tympanum on outer face, and inner face without tympana..............................7

6a. Hind tibia with 5 inner and 6 outer subapical spurs.................................................. C. saussurei .

6b. Hind tibia with 5 inner and 5 outer subapical spurs....................................... C. camerounensis sp. nov.

7a. Pronotum pale brown and unspotted.............................................................. C. scenicus .

7b. Pronotum pale brown spotted ............................. ................. ............................... 8

8a. Presence of 4 dark prominent points along the posterior edge of the pronotum and lateral lobes completely black.................................................................................................... C. rybalovi .

8b. Presence of small dark dots on pronotum and lateral lobes with pale band in lower third............................. 9

9a. Long ectoparameres extending beyond the apical end of the epiphallic lobes.............................. C. grumeti .

9b. Short ectoparameres not reaching the apical end of the epiphallic lobes.......................................... 10

10a. Male genitalia with short endoparameres, and short tapering ectoparameres............................. C. gambelae .

10b. Male genitalia with long endoparameres, and short wide ectoparameres........... ............................... 11

11a. Species less than 12mm in size with an apical field of medium length.................................. C. illubabori .

11b. Species larger than 12mm with a long apical field..................................................... ..... .. 12

12a. Ectoparameres with pointed ends.................................. ............................ C. medvedevi .

12b. Ectoparameres with rounded ends............. ...........................................................13

13a. Pronotum strongly narrowed in front, macropterous female.... ……….................................. C. apricus .

13b. Pronotum not narrowed in front, brachypterous or micropterous female... ....................................... 14

14a. Occiput with 3 black bands, the median one being wider, long and the lateral bands narrower, shorter...................................................................................................... C. desutterae sp. nov.

14b. Occiput with back zone delimited by brown bands extending laterally under each eye to the posterior end of the occiput..... .................................................................................................. 15

15a. Forewings with a mirror with a dividing vein......... .................................................. ....16

15b. Forewings with a mirror without a dividing vein........ ..................... ................................19

16a. Male forewings with 4 oblique veins......... ........................................................ .... 17

16b. Male forewings with 5 oblique veins. ............. .................... ................................ .....18

17a. Occiput with 2 brownish stripes in the black area forming the letter H; Pronotum with many black spots and dots................................................................................................... C. alternatus .

17b. Occiput with 3 short brownish stripes in the black area; Pronotum spotted by a few black dots............ C. superciliosus .

18a. Division of vein forming a circle with the mirror..................................................... C. matuga .

18b. Division of vein forming a triangle with the mirror.................................................... C. agilis .

19a. Two broad yellowish bands extending from the head to the tip of the abdomen........................... C. bifasciatus .

19b. Coloration more uniform.......................................................................... ....20

20a. Mirror with a short vein indicating the start of division................. .............................. .........21

20b. Mirror without a short vein to indicate the beginning of division.......... ......................................22

21a. Male forewings with 4 oblique veins.........................................................…. C. duplicatus .

21b. Male forewings with 5 oblique veins............................................................. C. mombo .

22a. Male forewings with 4 oblique veins............................................................. C. sagalus .

22b. Male forewings with 5 oblique veins............................................................. C. impiger .