Table 1 Measurements (in µm) of selected morphological characters of Ramazzottius groenlandensis sp. nov. mounted in Hoyer’s medium
Range | Mean | SD | |||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|
Character | N | µm | pt | µm | pt | µm | pt | ||||
Body length | 55 | 166.9 | ‒ | 370.3 | 520.9 | ‒ | 1164.0 | 289.8 | 911.6 | 53.8 | 144.3 |
Buccal-pharyngeal tube | |||||||||||
Buccal tube length | 58 | 24.3 | ‒ | 37.5 | 31.6 | 2.5 | |||||
Stylet support insertion point | 57 | 14.1 | ‒ | 21.6 | 51.0 | ‒ | 63.2 | 18.5 | 58.4 | 1.6 | 2.9 |
Buccal tube external width | 58 | 1.8 | ‒ | 3.7 | 5.9 | ‒ | 12.4 | 2.7 | 8.4 | 0.4 | 1.2 |
Buccal tube internal width | 58 | 0.9 | ‒ | 2.1 | 2.9 | ‒ | 7.0 | 1.4 | 4.3 | 0.3 | 0.9 |
Placoid lengths | |||||||||||
Macroplacoid 1 | 57 | 2.8 | ‒ | 4.9 | 9.2 | ‒ | 14.7 | 3.7 | 11.8 | 0.5 | 1.5 |
Macroplacoid 2 | 57 | 2.4 | ‒ | 4.3 | 7.0 | ‒ | 13.8 | 3.3 | 10.6 | 0.5 | 1.6 |
Macroplacoid row | 57 | 6.6 | ‒ | 10.1 | 20.2 | ‒ | 33.4 | 8.2 | 26.0 | 0.9 | 2.8 |
Claw I lengths | |||||||||||
External base | 58 | 5.7 | ‒ | 11.4 | 19.7 | ‒ | 35.6 | 8.3 | 26.4 | 1.4 | 4.0 |
External primary branch | 57 | 7.7 | ‒ | 16.9 | 29.3 | ‒ | 51.6 | 12.9 | 40.7 | 1.7 | 5.0 |
External secondary branch | 52 | 4.7 | ‒ | 9.9 | 14.9 | ‒ | 31.6 | 7.2 | 22.9 | 1.2 | 3.8 |
Internal base | 58 | 3.9 | ‒ | 8.9 | 12.6 | ‒ | 28.9 | 6.3 | 19.9 | 1.2 | 3.4 |
Internal primary branch | 58 | 5.1 | ‒ | 11.0 | 19.3 | ‒ | 34.2 | 8.3 | 26.2 | 1.3 | 3.5 |
Internal secondary branch | 55 | 3.7 | ‒ | 8.7 | 14.0 | ‒ | 27.7 | 6.4 | 20.4 | 1.1 | 3.1 |
Claw II lengths | |||||||||||
External base | 55 | 5.9 | ‒ | 12.6 | 18.3 | ‒ | 37.2 | 8.9 | 28.2 | 1.6 | 4.6 |
External primary branch | 55 | 7.9 | ‒ | 17.9 | 32.3 | ‒ | 53.3 | 14.5 | 45.6 | 1.8 | 4.4 |
External secondary branch | 54 | 3.5 | ‒ | 10.1 | 14.3 | ‒ | 31.2 | 7.6 | 24.0 | 1.5 | 4.2 |
Internal base | 55 | 4.5 | ‒ | 11.0 | 12.6 | ‒ | 34.4 | 6.5 | 20.4 | 1.2 | 3.4 |
Internal primary branch | 55 | 5.8 | ‒ | 14.3 | 20.1 | ‒ | 44.6 | 9.0 | 28.3 | 1.4 | 4.0 |
Internal secondary branch | 53 | 4.7 | ‒ | 10.0 | 17.9 | ‒ | 29.7 | 7.4 | 23.2 | 1.0 | 2.8 |
Claw III lengths | |||||||||||
External base | 55 | 5.3 | ‒ | 12.6 | 15.0 | ‒ | 39.3 | 9.3 | 29.4 | 1.6 | 4.9 |
External primary branch | 54 | 11.9 | ‒ | 20.9 | 39.7 | ‒ | 57.9 | 15.6 | 48.7 | 1.8 | 4.6 |
External secondary branch | 49 | 4.5 | ‒ | 11.1 | 15.0 | ‒ | 34.6 | 8.1 | 25.4 | 1.5 | 4.5 |
Internal base | 54 | 4.6 | ‒ | 9.3 | 14.4 | ‒ | 29.5 | 6.6 | 20.7 | 1.1 | 3.1 |
Internal primary branch | 54 | 6.5 | ‒ | 11.4 | 21.6 | ‒ | 36.1 | 9.2 | 28.8 | 1.2 | 3.3 |
Internal secondary branch | 52 | 5.2 | ‒ | 10.0 | 16.8 | ‒ | 30.2 | 7.4 | 23.3 | 1.0 | 2.7 |
Claw IV lengths | |||||||||||
Anterior base | 56 | 5.1 | ‒ | 8.8 | 16.7 | ‒ | 26.6 | 7.0 | 22.2 | 0.9 | 2.7 |
Anterior primary branch | 56 | 6.5 | ‒ | 12.1 | 19.6 | ‒ | 38.4 | 9.7 | 30.6 | 1.2 | 3.4 |
Anterior secondary branch | 53 | 4.4 | ‒ | 10.0 | 17.7 | ‒ | 32.9 | 7.7 | 24.3 | 1.3 | 3.8 |
Posterior base | 57 | 7.1 | ‒ | 13.0 | 21.7 | ‒ | 40.9 | 9.7 | 30.8 | 1.3 | 4.0 |
Posterior primary branch | 56 | 11.0 | ‒ | 20.5 | 43.5 | ‒ | 61.0 | 17.4 | 54.9 | 1.7 | 3.9 |
Posterior secondary branch | 52 | 4.6 | ‒ | 10.2 | 14.9 | ‒ | 32.5 | 7.6 | 24.2 | 1.3 | 4.1 |