Table 2 Mean tooth areas of the tooth parts (cusp, stylus, basis) still present in every second row (tooth row 1 = outermost row [oldest and most frequently used one]; tooth row 11 = first [youngest] row with almost no signs of wear) after foraging on sandpaper (rough, medium, fine), in %. n = analyzed teeth for area loss calculation.

From: Feeding experiments on Vittina turrita (Mollusca, Gastropoda, Neritidae) reveal tooth contact areas and bent radular shape during foraging

Tooth structure Inner 15 marginal teeth Lateral II Lateral I
Cusp Stylus Cusp Basis Stylus Cusp Basis
Sandpaper
type
Rough Medium Fine Rough Medium Fine Rough Medium Fine Rough Medium Fine Rough Medium Fine Rough Medium Fine Rough Medium Fine
Tooth row
1 0.00 0.00 0.00 67.81 69.42 66.91 0.00 0.00 0.00 80.78 84.57 70.40 61.29 85.29 60.29 76.32 84.42 47.14 76.03 87.40 53.56
n = 213 n = 201 n = 214 n = 211 n = 199 n = 216 n = 20 n = 20 n = 20 n = 19 n = 17 n = 16 n = 19 n = 17 n = 17 n = 19 n = 16 n = 18 n = 19 n = 16 n = 18
3 0.00 0.00 0.00 73.56 78.78 69.60 0.00 0.00 0.00 100.00 100.00 85.67 63.24 92.16 63.11 81.58 90.91 55.71 78.65 90.80 64.42
n = 256 n = 255 n = 235 n = 257 n = 235 n = 215 n = 20 n = 20 n = 20 n = 16 n = 18 n = 15 n = 16 n = 15 n = 16 n = 17 n = 18 n = 16 n = 17 n = 18 n = 16
5 16.73 16.85 8.63 100.00 100.00 87.41 16.78 24.83 0.00 100.00 100.00 100.00 73.04 98.04 85.99 84.21 93.51 71.43 78.65 90.84 67.42
n = 276 n = 234 n = 215 n = 272 n = 247 n = 217 n = 19 n = 17 n = 15 n = 19 n = 17 n = 15 n = 19 n = 17 n = 15 n = 19 n = 17 n = 19 n = 19 n = 17 n = 19
7 37.06 37.09 16.75 100.00 100.00 100.00 46.64 39.26 19.80 100.00 100.00 100.00 92.65 100.00 95.17 100.00 100.00 82.86 79.40 95.42 75.66
n = 241 n = 267 n = 290 n = 239 n = 269 n = 265 n = 16 n = 19 n = 16 n = 16 n = 19 n = 16 n = 17 n = 19 n = 18 n = 17 n = 15 n = 16 n = 17 n = 15 n = 16
9 86.80 86.83 68.02 100.00 100.00 100.00 81.21 90.27 43.96 100.00 100.00 100.00 100.00 100.00 100.00 100.00 100.00 84.29 91.39 100.00 76.40
n = 264 n = 294 n = 273 n = 272 n = 281 n = 267 n = 19 n = 19 n = 17 n = 20 n = 20 n = 20 n = 20 n = 20 n = 20 n = 19 n = 18 n = 15 n = 19 n = 18 n = 15
11 100.00 100.00 100.00 100.00 100.00 100.00 100.00 100.00 100.00 100.00 100.00 100.00 100.00 100.00 100.00 100.00 100.00 100.00 100.00 100.00 100.00
n = 288 n = 291 n = 267 n = 288 n = 271 n = 265 n = 20 n = 20 n = 20 n = 20 n = 20 n = 20 n = 20 n = 20 n = 20 n = 18 n = 17 n = 16 n = 18 n = 17 n = 16