Amytta

Hemp, Claudia & Heller, Klaus-Gerhard, 2017, Revision of the genus Amytta (Orthoptera: Tettigoniidae, Meconematinae) and new species from East Africa, Zootaxa 4263 (2), pp. 295-317 : 297

Key to species of Amytta (males)

1 Alate species with tegmina and wings slightly shorter, as long or longer than body length.............................2

1´Flightless species with tegmina shortened.................................................................. 6

2 Tegmina not reaching end of abdomen, covering about 2/3 of abdomen; last abdominal tergite unmodified. Tanzania, North Pare Mountains.......................................................................... A. mramba n. sp.

2´Tegmina about body length or longer......................................................................3

3 Last abdominal tergite with elongated strongly down-curved process; tegmina and alae about body length or slightly longer. Tanzania, North Pare Mountains............................................................. A. judithae n. sp.

3´Last abdominal tergite without elongated down-curved process; tegmina and alae surpassing body length by about ½ of their length..............................................................................................4

4 Posterior margin of last abdominal tergite with two thorn-like processes forming broad “u” medially; cerci differentiated into two large branches. Central Tanzania, Iringa province................................................. A. ukamica

4´Posterior margin of last abdominal tergite without processes, male cerci not differentiated into two branches............. 5

5 Male cerci with finger-like process basally. Tanzania, West Usambara Mountains...................... A. digitata n. sp.

5´Male cerci without finger-like process basally. Tanzania, East Usambara Mountains and coastal Tanzania....... A. pellucida

6 Last abdominal tergite with process.......................................................................7

6´Last abdominal tergite without process.....................................................................8

7 Last abdominal tergite with elongated, strongly bulging and down-curved process ( Fig. 4 , 5 A ). Tanzania, North Pare Moun- tains................................................................................... A. kilomeni n. sp.

7´Last abdominal tergite with short process ( Fig. 12 B). Tanzania, Mt Kilimanjaro ...................... A. savannae n. sp.

8 Posterior margin of last abdominal tergite broadly incurved ( Fig. 1 B; 2 A, C)......................................9

8´Posterior margin of last abdominal tergite with median incision ( Fig. 1 C–E)...................................... 11

9 Cerci laterally compressed and folded, forming hollow space; subapically with blade-like projection and inwardly curved, hol- low apices. Tanzania, submontane zone Mt Kilimanjaro................................................. A. olindo

9´Cerci not as strongly laterally compressed, subapical dorsal blade prominent and apical branch differentiated into twisted three dimensional structure.................................................................................10

10 Subapical blade of cerci large with broad base; apical structure of inner cercal branch with acute apex and knob-like structure subapically ( Fig. 2 C, D). Tanzania, montane forest Mt Meru.................................. A. merumontana n. sp.

10´Subapical blade of cerci not as large and more slender as in A. merumontana n. sp.; apex of inner cercal branch long and slen- der and well-developed conus-like structure subapically ( Fig. 2 A, B). Tanzania, montane zone of Mt Kilimanjaro................................................................................................ A. kilimandjarica

11 Apices of cerci strongly folded and apically pointed.........................................................12

11´Apices of cerci not as strongly folded, more open. Tanzania, Mt Hanang.......................... A. hanangensis n. sp.

12 Tips of cerci bidentate with two acute apices. Kenya, Taita Hills................................... A. taitensis n. sp.

12´Tips of cerci not bidentate..............................................................................13

13 Cerci strongly folded with subapical dorsal blade large and almost inwardly curled apices; median incision of posterior margin of last abdominal tergite deep. Central Kenya, lower foothills of Aberdare Range......................... A. abbreviata

13´Cerci not as strongly folded with smaller subapical dorsal blade; apices of cerci more open; median incision smaller, not as deep as in A. abbreviata . Tanzania, Mt Meru.................................................. A. meruensis n. sp.

Figures

FIGURE 1. Detail images of abdominal apices of male Amytta species, dorsal view. A. A. digitata n. sp. B. A. olindo Hemp C. Amytta meruensis n. sp. D. A. hanangensis n. sp. E. A. abbreviata Beier F. A. pellucida Karsch (source OSFO).

FIGURE 2. Detail images of abdominal apices of male Amytta species. A, B. A. kilimandjarica Hemp C, D. A. merumontana n. sp.

FIGURE 4. Detail images of male abdominal apex of Amytta kilomeni n. sp. A. Lateral view B. Rear view C. Subgenital plate D. Dorsal view.

FIGURE 5. A. Male Amytta kilomeni n. sp, North Pare Mountains, Mt Kindoroko, lower border of montane forest 1750 m B. Female Amytta judithae n. sp., North Pare Mountains, Mt Kindoroko, forest clearing, 1800 m.

FIGURE 12. Morphological details of Amytta savannae n. sp. A. Head, pronotum and shortened tegmina of male B. Abdominal apex of male, dorsal view C. Ventral view with subgenital plate D. Female ovipositor.