Table 1.
Thickness and EDS results of three layers for all samples. Here, EDS results show weight % of calcium (Ca), magnesium (Mg), phosphorus (P), oxygen (O), and carbon (C). The compositions are the average values, including their standard deviation.
| Sample | Layer | Thickness (μm) | Ca (wt%) | Mg (wt%) | P (wt%) | O (wt%) | C (wt%) |
|---|---|---|---|---|---|---|---|
| Claw (CL) | Exocuticle | 200–250 | 30.6 ± 0.2 | 2.0 ± 0.1 | 0.4 ± 0.0 | 52.5 ± 0.3 | 13.9 ± 0.3 |
| Intermediate | 40 | 22.4 ± 0.2 | 1.5 ± 0.1 | 2.1 ± 0.1 | 51.1 ± 0.3 | 21.3 ± 0.3 | |
| Endocuticle | 1900–2300 | 23.8 ± 0.2 | 1.6 ± 0.1 | 0.5 ± 0.0 | 49.5 ± 0.3 | 23.3 ± 0.3 | |
| First walking leg (1WL) | Exocuticle | 180–190 | 31.0 ± 0.1 | 1.8 ± 0.0 | 0.4 ± 0.0 | 51.4 ± 0.1 | 14.7 ± 0.1 |
| Intermediate | 50 | 19.9 ± 0.1 | 1.3 ± 0.0 | 2.6 ± 0.0 | 49.7 ± 0.1 | 24.9 ± 0.1 | |
| Endocuticle | 1100–1150 | 25.3 ± 0.1 | 1.6 ± 0.0 | 1.0 ± 0.0 | 49.2 ± 0.1 | 21.8 ± 0.1 | |
| Front cephalothorax (FC) | Exocuticle | 115–125 | 26.7 ± 0.1 | 1.8 ± 0.0 | 0.7 ± 0.0 | 50.8 ± 0.2 | 19.3 ± 0.1 |
| Intermediate | 15 | 20.5 ± 0.1 | 1.2 ± 0.0 | 2.6 ± 0.0 | 49.2 ± 0.2 | 24.7 ± 0.2 | |
| Endocuticle | 600–650 | 12.6 ± 0.1 | 0.6 ± 0.0 | 0.8 ± 0.0 | 46.9 ± 0.2 | 34.8 ± 0.2 | |
| Rear cephalothorax (RC) | Exocuticle | 75–90 | 25 ± 0.1 | 1.6 ± 0.0 | 0.7 ± 0.0 | 49.5 ± 0.2 | 22.6 ± 0.2 |
| Intermediate | 15 | 15.7 ± 0.1 | 1.0 ± 0.0 | 2.2 ± 0.0 | 48.8 ± 0.2 | 29.8 ± 0.2 | |
| Endocuticle | 615 | 9.1 ± 0.1 | 0.4 ± 0.0 | 0.4 ± 0.0 | 46.7 ± 0.2 | 38.1 ± 0.2 | |
| Abdomen (AM) | Exocuticle | 95–105 | 24.2 ± 0.1 | 1.5 ± 0.0 | 0.6 ± 0.0 | 49.3 ± 0.2 | 23.7 ± 0.2 |
| Intermediate | 20 | 15.9 ± 0.1 | 0.9 ± 0.0 | 3.1 ± 0.0 | 45.8 ± 0.2 | 31.4 ± 0.3 | |
| Endocuticle | 430–480 | 14.8 ± 0.1 | 0.6 ± 0.0 | 0.5 ± 0.0 | 46.7 ± 0.2 | 33.6 ± 0.2 |