Table 2.
Plate thickness (µm) measurements of the test of E. pusillus. mad, median absolute deviation, n, sample size. Roman numerals indicate ambulacral plates; arabic numerals indicate interambulacral plates. Small letters indicate the position of the plate according to Lovén [74].
| median | mad | minimum | maximum | n | |
|---|---|---|---|---|---|
| Ia | 277.89 | 42.02 | 236.87 | 306.23 | 30 |
| Ib | 275.64 | 22.25 | 260.63 | 299.24 | 30 |
| IIa | 258.55 | 44.64 | 216.20 | 288.66 | 30 |
| IIb | 219.29 | 5.16 | 215.81 | 278.14 | 30 |
| IIIa | 260.85 | 16.92 | 249.44 | 319.52 | 30 |
| IIIb | 311.87 | 71.11 | 225.34 | 359.83 | 30 |
| IVa | 246.34 | 35.82 | 222.18 | 324.03 | 30 |
| IVb | 231.47 | 56.89 | 193.10 | 306.19 | 30 |
| Va | 264.62 | 15.17 | 254.39 | 305.59 | 30 |
| Vb | 257.12 | 11.82 | 223.36 | 265.09 | 30 |
| 1a | 874.99 | 7.46 | 869.96 | 958.87 | 30 |
| 1b | 912.49 | 37.75 | 887.03 | 1015.76 | 30 |
| 2a | 842.63 | 85.43 | 785.01 | 904.77 | 30 |
| 2b | 697.39 | 80.83 | 614.91 | 751.91 | 30 |
| 3a | 710.37 | 30.22 | 657.91 | 730.75 | 30 |
| 3b | 924.85 | 64.83 | 826.74 | 968.58 | 30 |
| 4a | 830.73 | 12.69 | 822.17 | 857.39 | 30 |
| 4b | 787.20 | 8.42 | 781.52 | 899.82 | 30 |
| 5a | 1299.45 | 182.06 | 1176.65 | 1493.49 | 30 |
| 5b | 1392.38 | 230.08 | 1237.19 | 1586.68 | 30 |