Table 5.
Measurements [in µm] and pt values of selected morphological structures of individuals of Paramacrobiotus fairbanksi Schill, Förster, Dandekar & Wolf 2010 Canadian population 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, pt—ratio of the length of a given structure to the length of the buccal tube expressed as a percentage).
| CHARACTER | N | RANGE | MEAN | SD | |||||||
|---|---|---|---|---|---|---|---|---|---|---|---|
| µm | pt | µm | pt | µm | pt | ||||||
| Body length | 17 | 303 | – | 772 | – | 564 | 133 | ||||
| Buccopharyngeal tube | |||||||||||
| Buccal tube length | 17 | 33.8 | – | 63.7 | – | 52.7 | – | 8.6 | – | ||
| Stylet support insertion point | 17 | 26.3 | – | 51.0 | 75.3 | – | 80.0 | 41.2 | 78.3 | 6.8 | 1.2 |
| Buccal tube external width | 17 | 6.2 | – | 13.7 | 15.4 | – | 23.8 | 11.3 | 21.3 | 2.3 | 1.9 |
| Buccal tube internal width | 17 | 4.5 | – | 11.4 | 11.0 | – | 18.1 | 8.2 | 15.4 | 1.9 | 1.8 |
| Ventral lamina length | 15 | 24.5 | – | 38.3 | 56.4 | – | 64.7 | 32.6 | 60.4 | 4.9 | 2.6 |
| Placoid lengths | |||||||||||
| Macroplacoid 1 | 17 | 4.7 | – | 11.7 | 12.5 | – | 19.9 | 8.9 | 16.7 | 2.1 | 1.8 |
| Macroplacoid 2 | 17 | 3.9 | – | 10.4 | 11.2 | – | 16.8 | 7.8 | 14.6 | 1.9 | 1.6 |
| Macroplacoid 3 | 17 | 5.0 | – | 12.1 | 14.9 | – | 20.9 | 9.7 | 18.2 | 2.0 | 1.6 |
| Microplacoid | 17 | 3.0 | – | 5.2 | 6.2 | – | 9.7 | 4.1 | 7.8 | 0.6 | 0.9 |
| Macroplacoid row | 16 | 21.5 | – | 36.0 | 51.8 | – | 59.5 | 30.2 | 55.9 | 4.8 | 2.3 |
| Placoid row | 17 | 23.6 | – | 46.8 | 68.5 | – | 75.8 | 37.8 | 71.6 | 6.9 | 2.4 |
| Claw 1 heights | |||||||||||
| External primary branch | 16 | 8.2 | – | 17.9 | 21.9 | – | 30.7 | 14.4 | 27.4 | 2.9 | 2.4 |
| External secondary branch | 16 | 5.5 | – | 14.8 | 16.2 | – | 25.2 | 10.9 | 20.6 | 2.3 | 1.9 |
| Internal primary branch | 16 | 8.4 | – | 16.1 | 20.7 | – | 29.0 | 13.2 | 25.2 | 2.5 | 2.2 |
| Internal secondary branch | 16 | 6.9 | – | 13.9 | 17.1 | – | 24.1 | 10.9 | 20.8 | 2.0 | 2.1 |
| Claw 2 heights | |||||||||||
| External primary branch | 17 | 9.2 | – | 18.1 | 22.7 | – | 30.3 | 14.6 | 27.6 | 3.0 | 2.7 |
| External secondary branch | 16 | 7.2 | – | 15.5 | 17.7 | – | 26.4 | 11.9 | 22.4 | 2.6 | 2.2 |
| Internal primary branch | 17 | 8.0 | – | 16.2 | 20.9 | – | 27.7 | 13.3 | 25.3 | 2.3 | 1.9 |
| Internal secondary branch | 17 | 6.9 | – | 13.8 | 19.0 | – | 23.6 | 11.1 | 21.1 | 2.1 | 1.3 |
| Claw 3 heights | |||||||||||
| External primary branch | 17 | 9.0 | – | 18.6 | 20.4 | – | 31.9 | 14.9 | 28.3 | 3.1 | 3.2 |
| External secondary branch | 17 | 7.1 | – | 14.4 | 17.0 | – | 25.9 | 11.7 | 22.0 | 2.5 | 2.4 |
| Internal primary branch | 17 | 8.5 | – | 18.3 | 23.0 | – | 31.5 | 14.2 | 26.9 | 2.7 | 2.0 |
| Internal secondary branch | 17 | 7.3 | – | 14.6 | 17.9 | – | 24.9 | 11.8 | 22.4 | 2.1 | 1.7 |
| Claw 4 heights | |||||||||||
| Anterior primary branch | 17 | 10.2 | – | 19.2 | 25.1 | – | 34.6 | 15.9 | 30.3 | 2.5 | 2.5 |
| Anterior secondary branch | 17 | 6.6 | – | 14.6 | 16.3 | – | 25.6 | 11.9 | 22.5 | 2.3 | 2.1 |
| Posterior primary branch | 17 | 10.9 | – | 21.2 | 27.1 | – | 36.2 | 16.3 | 31.1 | 2.8 | 2.6 |
| Posterior secondary branch | 17 | 7.8 | – | 15.0 | 20.4 | – | 27.8 | 12.4 | 23.5 | 2.0 | 1.9 |
pt values are in italics.