1. Antenna 1 shorter than half of antenna 2................................................................... 2
- Antenna 1 longer than half of antenna 2.................................................................... 3
2. Pereopod 7 stout, dorsal margin of inner rami on uropods 1 and 2 with spines................ K. kuthae Dershavin, 1923
- Pereopod 7 not stout, dorsal margin of inner rami on uropods 1 and 2 without spines....... K. derzharvini Gurjanova, 1951
3. Posteroventral process of propodus on ganthopod 2 enlarged dorsoventrally....................................... 4
- Posteroventral process of propodus on ganthopod 2 not enlarged................................................ 8
4. Peduncular article 2 of antenna 2 with ovoid lamellate appendix......................... K. foliacea Ren & Sha, 2012
- Peduncular article 2 of antenna 2 without ovoid lamellate appendix............................................ 5
5. Posterior margin of basis of pereopod 7 lacking plumose setae............................... K. poppi Bamber, 2003
- Posterior margin of basis of pereopod 7 possessing plumose setae............................................... 6
6. Posterodistal corner of peduncular article 4 on antenna 2 presenting stout protuberance...... K. corophina Ren & Sha, 2012
- Posterodistal corner of peduncular article 4 on antenna 2 without stout protuberance............................... 7
7. Antenna 2, first proximal segment of flagellum with serrate posterior margin........ K. songkhlaensis Ariyama et al., 2010
- Antenna 2, first proximal segment of flagellum normal.......................... K. taditadi Thomas & Barnard, 1991
8. Propodus of gnathopod 2 triangular in shape............................................................... 9
- Propodus of gnathopod 2 subquadrate in shape............................................................. 13
9. Peduncular article 5 and several proximal segments of antenna 2 showing protuberances................ K. rostra sp. nov.
- Peduncular article 5 and several proximal segments of antenna 2 not showing protuberances......................... 10
10. Peduncular article 2 of male antenna 2 with ovoid lamellate appendix.............. K. appendiculata Ariyama et al., 2010
- Peduncular article 2 of male antenna 2 without ovoid lamellate appendix......................................... 11
11. Posterior margin of basis on pereopod 7 lacking plumose setae............................... K. palmata Dang, 1968
- Posterior margin of basis on pereopod 7 possessing plumose setae............................................. 12
12. Pereopods 5–7 with few plumose setae on posterior margin of basis............................ K. biwae Uéno, 1943
- Pereopods 5–7 with many plumose setae on posterior margin of basis....................... K. morrinoi Ariyama, 2007
13. Posterior process of propodus on ganthopod 2 not deep..................................... K. silvana Myers, 2009
- Posterior process of propodus on ganthopod 2 deep......................................................... 14
14. Anterior and posterior margins of propodus on ganthopod 2 parallel........................ K. excavata Ariyama, 2007
- Anterior and posterior margins of propodus on ganthopod 2 not parallel......................................... 15
15. Carpus on pereopod 3 more expanded, width 0.77 times as long as length........................ K. littoralis Ren, 2006
- Carpus on pereopod 3 weakly expanded, width 0.47 times as long as length.................. K. tonlensis Morino, 2012