Table 3.
Measurements [in μm] and pt values of selected morphological structures of animals of Richtersius coronifer s.s. (Richters, 1903) from the Billefjorden population. (Specimens mounted in Hoyer’s medium; N – number of specimens/structures measured, RANGE refers to the smallest and the largest structure among all measured specimens; SD – standard deviation; * – proposed new neotype)
| Character | N | Range | Mean | SD | Neotype* | ||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| μm | pt | μm | pt | μm | pt | μm | pt | ||||||
| Body length | 30 | 499 | – | 1027 | 701 | – | 1125 | 771 | 898 | 164 | 117 | 984 | 1057 |
| Buccopharyngeal tube | |||||||||||||
| Buccal tube length | 30 | 68.5 | – | 100.5 | – | 85.2 | – | 10.0 | – | 93.1 | – | ||
| Stylet support insertion point | 30 | 51.2 | – | 74.4 | 72.1 | – | 75.6 | 63.0 | 74.0 | 7.2 | 1.1 | 68.8 | 73.9 |
| Buccal tube external width | 30 | 5.6 | – | 10.5 | 7.6 | – | 11.0 | 8.0 | 9.4 | 1.3 | 1.0 | 9.5 | 10.2 |
| Buccal tube internal width | 30 | 1.2 | – | 3.5 | 1.7 | – | 3.8 | 1.9 | 2.3 | 0.4 | 0.5 | 1.9 | 2.0 |
| Ventral lamina length | 30 | 32.0 | – | 47.6 | 40.1 | – | 51.3 | 39.3 | 46.2 | 4.8 | 3.0 | 43.3 | 46.5 |
| Placoid lengths | |||||||||||||
| Macroplacoid 1 | 30 | 7.5 | – | 15.5 | 10.2 | – | 15.9 | 11.9 | 13.9 | 2.5 | 1.8 | 11.4 | 12.2 |
| Macroplacoid 2 | 30 | 6.2 | – | 11.5 | 8.7 | – | 12.6 | 8.9 | 10.4 | 1.5 | 1.1 | 10.1 | 10.8 |
| Macroplacoid row | 30 | 14.8 | – | 28.5 | 20.8 | – | 31.3 | 22.2 | 25.9 | 3.7 | 2.5 | 22.9 | 24.6 |
| Claw 1 heights | |||||||||||||
| External base | 25 | 9.2 | – | 17.6 | 13.0 | – | 20.6 | 14.0 | 16.5 | 2.5 | 1.8 | 16.8 | 18.0 |
| External primary branch | 25 | 20.9 | – | 31.4 | 27.4 | – | 36.7 | 26.3 | 31.2 | 3.0 | 2.4 | 28.7 | 30.9 |
| External secondary branch | 24 | 12.1 | – | 25.4 | 16.9 | – | 30.9 | 17.7 | 20.8 | 3.6 | 3.0 | 22.1 | 23.7 |
| External base/primary branch (cct) | 25 | 42.0 | – | 59.2 | – | 53.0 | – | 5.1 | – | 58.5 | – | ||
| Internal base | 25 | 8.6 | – | 16.6 | 12.2 | – | 19.3 | 13.4 | 16.0 | 2.3 | 1.7 | 12.8 | 13.7 |
| Internal primary branch | 26 | 20.8 | – | 30.8 | 25.2 | – | 36.5 | 26.6 | 31.5 | 2.5 | 2.6 | 26.1 | 28.0 |
| Internal secondary branch | 25 | 10.7 | – | 21.5 | 14.7 | – | 25.9 | 16.0 | 19.0 | 3.2 | 2.7 | ? | ? |
| Internal base/primary branch (cct) | 24 | 40.2 | – | 57.8 | – | 50.6 | – | 4.3 | – | 49.0 | – | ||
| Claw 2 heights | |||||||||||||
| External base | 25 | 9.6 | – | 19.0 | 13.6 | – | 20.9 | 14.5 | 16.9 | 2.7 | 1.8 | 15.4 | 16.5 |
| External primary branch | 29 | 23.2 | – | 33.7 | 27.9 | – | 38.7 | 28.5 | 33.4 | 3.0 | 2.3 | 30.5 | 32.8 |
| External secondary branch | 27 | 11.3 | – | 22.9 | 15.5 | – | 25.0 | 18.2 | 21.0 | 3.1 | 2.2 | 22.9 | 24.6 |
| External base/primary branch (cct) | 25 | 40.7 | – | 58.2 | – | 51.0 | – | 5.5 | – | 50.5 | – | ||
| Internal base | 26 | 9.0 | – | 18.2 | 12.7 | – | 21.3 | 14.6 | 16.9 | 2.5 | 1.7 | 15.6 | 16.8 |
| Internal primary branch | 28 | 23.7 | – | 35.2 | 27.6 | – | 37.2 | 28.9 | 33.9 | 3.1 | 2.4 | 30.1 | 32.3 |
| Internal secondary branch | 28 | 12.8 | – | 21.8 | 16.5 | – | 25.5 | 17.2 | 20.0 | 2.7 | 1.8 | 19.7 | 21.2 |
| Internal base/primary branch (cct) | 26 | 38.0 | – | 57.6 | – | 49.9 | – | 5.4 | – | 51.8 | – | ||
| Claw 3 heights | |||||||||||||
| External base | 22 | 9.7 | – | 18.4 | 13.9 | – | 20.6 | 14.7 | 17.2 | 2.7 | 1.6 | 17.5 | 18.8 |
| External primary branch | 25 | 24.0 | – | 40.7 | 30.3 | – | 41.2 | 29.1 | 34.5 | 4.4 | 2.8 | 31.4 | 33.7 |
| External secondary branch | 23 | 12.0 | – | 23.1 | 17.5 | – | 25.3 | 18.4 | 21.6 | 3.6 | 2.4 | 22.1 | 23.7 |
| External base/primary branch (cct) | 22 | 39.3 | – | 57.6 | – | 50.5 | – | 5.2 | – | 55.7 | – | ||
| Internal base | 22 | 9.8 | – | 20.6 | 14.1 | – | 21.3 | 14.1 | 16.7 | 2.8 | 1.9 | 15.8 | 17.0 |
| Internal primary branch | 22 | 22.6 | – | 42.4 | 30.6 | – | 42.9 | 28.8 | 34.4 | 4.4 | 2.9 | 31.2 | 33.5 |
| Internal secondary branch | 22 | 11.5 | – | 29.2 | 15.7 | – | 31.7 | 16.9 | 20.0 | 4.1 | 3.3 | 19.6 | 21.1 |
| Internal base/primary branch (cct) | 22 | 40.2 | – | 57.3 | – | 48.7 | – | 4.5 | – | 50.6 | – | ||
| Claw 4 heights | |||||||||||||
| Anterior base | 25 | 12.6 | – | 22.0 | 15.1 | – | 25.7 | 17.3 | 20.5 | 2.6 | 2.4 | 18.9 | 20.3 |
| Anterior primary branch | 26 | 29.1 | – | 44.4 | 32.4 | – | 52.6 | 35.8 | 42.7 | 4.0 | 4.9 | 39.8 | 42.7 |
| Anterior secondary branch | 25 | 13.6 | – | 28.0 | 19.5 | – | 35.9 | 20.5 | 24.3 | 3.8 | 3.7 | 23.3 | 25.0 |
| Anterior base/primary branch (cct) | 24 | 41.3 | – | 54.5 | – | 47.6 | – | 3.6 | – | 47.5 | – | ||
| Posterior base | 26 | 11.4 | – | 23.5 | 16.1 | – | 24.3 | 17.2 | 20.5 | 2.8 | 2.1 | 22.1 | 23.7 |
| Posterior primary branch | 28 | 27.2 | – | 42.2 | 29.5 | – | 49.3 | 35.0 | 41.6 | 3.8 | 4.0 | 40.0 | 43.0 |
| Posterior secondary branch | 27 | 12.8 | – | 27.3 | 18.1 | – | 29.1 | 20.0 | 23.6 | 4.0 | 3.1 | 25.9 | 27.8 |
| Posterior base/primary branch (cct) | 26 | 41.1 | – | 56.8 | – | 48.7 | – | 4.5 | – | 55.3 | – | ||