Key for studied species

1.1 Preanal carina with spine................................................................................2

1.2 Preanal carina unarmed...................................................................... C. brevidactyla

2.1 P1 carpus greater than 1.9 times as long as wide and P2 carpus mostly than 4.3..................................... 3

2.2 P1 carpus less than 1.8 (1.4–1.8) times as long as wide and P2 carpus than 4.2.......................... C. longirostris

3.1 P1 Chela greater than 2.1 times (2.1–2.3) as long as wide; P3 dactylus with mostly 5-6 spines (5–7) on flexor margin in addition to the terminal one.................................................................... C. brachydactyla

P1 Chela less than 2.1 times as long; P3 dactylus with mostly 6–9 spines on flexor margin in addition to the terminal one..... 4

4.1 P5 propodus 4.3–5.7 as long as dactylus.......................................................... C. natalensis

4.2 P5 propodus mostly 3.4–4.1 (3.4–5.8) as long as dactylus............................................. C. gracilipes