Key to species of Chidaea Emeljanov
Notes. This key is mainly based on male specimens, depending on the species, females can only be identified to a certain level. Numerous females were found in material located at the following collections (AMS, ANIC, ASCU, BPBM, QDPI, QM and SAMA) that based on morphological characters alone could not be identified to species level. Chidaea sidnicus is also excluded from the key as the only known specimen is a female.
1 First hind tarsomere apically with a row of at least 4 platellae. .................................................. 2
- First hind tarsomere apically without platellae.............................................................. 9
2(1) Tubercles of forewing dark and distinctly contrasted to paler coloured veins (Figs 5A, 7A, 10A, 11A).................. 3
- Tubercles of forewing dark or pale and concolorous with veins (Figs 2A, 4A, 6A, 12A)............................. 6
3(2) Aedeagus with left lateral spine (a) distinctly longer (almost twice as long) than right lateral spine (b) (Fig. 26B)........................................................................................... Ch. kimbaensis sp. nov.
- Aedeagus with both spines about the same length or right lateral spine (b) longer (Figs 22B, 25B). ..................... 4
4(3) Aedeagal spines reaching or surpassing bifurcate ventral process. (Figs 22B, C)..................... Ch. crassa sp. nov.
- Aedeagal spines not reaching bifurcate ventral process (Figs 20 B–C, 25B–C)..................................... 5
5(4) Base of bifurcate ventral process symmetrical (Fig. 25B)........................................ Ch. etelis sp. nov.
- Base of bifurcate ventral process asymmetrical (Fig. 20B)................................ Ch. bobadeenensis sp. nov.
6(2) Pronotum very long (median carina of pronotum as long or longer than length of basal compartment of vertex) as in Fig. 6B; carinae on pronotum and head extremely well developed and in distinct colour contrast to adjacent darker areas (Figs 6 B–D).................................................................................... Ch. carinata sp. nov.
- Pronotum short (median carina of pronotum usually much shorter than length of basal compartment of vertex) as in Fig. 2B; carinae on pronotum and head not in such clear contrast to adjacent areas (Figs 2 B–D, 4B–D, 12B–D).................. 7
7(6) Aedeagus with entire length of spines visible in ventral view (Fig. 17B); aedeagus with two long spines that cross over ventrally (Fig. 17B)............................................................................ Ch. algida sp. nov.
- Aedeagus with spines partly or completely concealed by phallotheca in ventral view (Figs 19B, 27B).................. 8
8(7) Aedeagal spines by far not reaching bifurcate ventral process (Figs 27 A–C). Body length of males 5.7 mm or more, females 6.6 mm or more....................................................................... Ch. orangensis sp. nov.
- Aedeagal spines reaching, or almost reaching bifurcate ventral process (Figs 19 A–C). Body length of males 4 mm or less, females 5 mm or less................................................................ Ch. belairensis sp. nov.
9(1) Mesonotum with a prominent black central stripe (area between lateral carinae) in distinct contrast to pale area outside of carinae, often with extreme lateral areas of mesonotum also darkened (Figs 13B,D)................... Ch. pulyonna sp. nov.
- Mesonotum dark or lightly coloured but without a distinctly contrasted, darker central area (Figs 14 C–D). .............. 10
10(9) Forewings with a u-shaped pattern consisting of 6 dark brown spots (Fig. 14A).................... Ch. punctata sp. nov.
- Forewings without such u-shaped pattern................................................................. 11
11(10) Aedeagus ventrally with a spine with a large base (Figs 18B, 23B)............................................. 12
- Aedeagus laterally or ventro-laterally with a spine with a small to moderate base (Figs 24 A–C, 30A–C)................ 13
12(11) Ventral spine (b) of aedeagus with its tip directed left laterad (Fig. 23B)........................... Ch. dayi Emeljanov
- Ventral spine (b) of aedeagus with its tip directed right laterad (Fig. 18B)...................... Ch. armidalensis sp. nov.
13(11) Aedeagus in lateral view with both spines equally strongly curved (Figs 30A,C).................... Ch. wilarra sp. nov.
- Aedeagus in lateral view with left lateral spine (a) moderately to strongly curved and right lateral spine (b) almost straight (Figs 24A,C)........................................................................ Ch. dickinsonorum sp. nov.