Table 1.
Morphometric data on Oxytricha acidotolerans sp. nov.
| Charactera | HT | Mean | M | SD | SE | CV | Min | Max | n |
|---|---|---|---|---|---|---|---|---|---|
| Body, length | 83 | 76.5 | 79.0 | 8.3 | 1.8 | 10.9 | 55 | 88 | 21 |
| Body, width | 30 | 27.5 | 29.0 | 4.6 | 1.0 | 16.8 | 16 | 32 | 21 |
| Adoral zone of membranelles, length | 26 | 24.1 | 24.0 | 1.7 | 0.4 | 7.2 | 21 | 28 | 21 |
| AE to distal end of adoral zone, distance | 6 | 5.7 | 6.0 | 0.5 | 0.1 | 8.3 | 5 | 6 | 21 |
| Adoral membranelles, maximum width | 6 | 5.9 | 5.6 | 0.8 | 0.2 | 13.1 | 5 | 8 | 21 |
| AE to paroral, distance | 7 | 6.6 | 6.5 | 1.1 | 0.3 | 16.9 | 5 | 9 | 20 |
| AE to endoral, distance | 7 | 6.1 | 6.0 | 1.2 | 0.3 | 20.5 | 4 | 10 | 21 |
| Paroral, length | 10 | 10.5 | 10.0 | 1.0 | 0.2 | 9.6 | 9 | 13 | 20 |
| Endoral, length | 14 | 13.9 | 14.0 | 1.2 | 0.3 | 8.7 | 12 | 16 | 20 |
| AE to buccal cirrus, distance | 8 | 7.0 | 7.0 | 1.0 | 0.2 | 14.3 | 6 | 9 | 21 |
| AE to cirrus III/2, distance | 15 | 14.4 | 14.0 | 1.3 | 0.3 | 9.3 | 11 | 17 | 21 |
| AE to cirrus IV/3, distance | 18 | 17.5 | 18.0 | 1.4 | 0.3 | 8.2 | 14 | 20 | 21 |
| AE to cirrus VI/3, distance | 15 | 14.6 | 14.0 | 1.8 | 0.4 | 12.3 | 11 | 18 | 21 |
| AE to cirrus VI/4, distance | 12 | 11.1 | 10.0 | 1.5 | 0.3 | 13.7 | 10 | 14 | 21 |
| AE to frontmost postoral ventral cirrus, distance | 29 | 26.4 | 27.0 | 2.6 | 0.6 | 9.8 | 18 | 29 | 21 |
| AE to rearmost postoral ventral cirrus, distance | 37 | 33.9 | 34.0 | 2.7 | 0.6 | 7.8 | 37 | 37 | 18 |
| AE to left marginal row, distance | 22 | 21.6 | 22.0 | 1.5 | 0.3 | 7.1 | 18 | 24 | 21 |
| AE to right marginal row, distance | 19 | 15.9 | 15.0 | 2.2 | 0.5 | 13.6 | 13 | 19 | 21 |
| PE to anteriormost pretransverse ventral cirrus, distance | 10 | 11.9 | 12.0 | 2.0 | 0.4 | 17.2 | 7 | 16 | 21 |
| PE to rearmost transverse cirrus, distance | 3 | 3.1 | 3.0 | 0.7 | 0.2 | 23.5 | 1.5 | 4 | 21 |
| PE to anteriormost transverse cirrus, distance | 9 | 9.8 | 10.0 | 1.2 | 0.3 | 12.2 | 8 | 12 | 21 |
| Left caudal cirrus to middle caudal cirrus, distance | 3 | 2.6 | 2.5 | 0.4 | 0.1 | 17.1 | 1.6 | 3.2 | 20 |
| Middle caudal cirrus to right caudal cirrus, distance | 5 | 4.1 | 4.0 | 1.1 | 0.3 | 27.2 | 2 | 6 | 19 |
| AE to anterior macronuclear nodule, distance | 33 | 29.0 | 30.0 | 3.9 | 0.9 | 13.6 | 20 | 34 | 21 |
| Anterior macronuclear nodule, length | 10 | 10.6 | 10.0 | 1.4 | 0.3 | 13.2 | 9 | 14 | 21 |
| Anterior macronuclear nodule, width | 6 | 6.9 | 7.0 | 0.9 | 0.2 | 12.9 | 5 | 8 | 21 |
| Posterior macronuclear nodule, length | 10 | 9.8 | 10.0 | 1.2 | 0.3 | 11.9 | 8 | 12 | 21 |
| Posterior macronuclear nodule, width | 8 | 7.5 | 8.0 | 0.8 | 0.2 | 10.7 | 5.0 | 8.0 | 21 |
| Macronuclear nodules, distance in between | 5 | 3.4 | 3.0 | 1.8 | 0.4 | 54.2 | 0 | 7 | 21 |
| Anterior micronucleus, diameter | 3 | 3.2 | 3.2 | 0.3 | 0.1 | 8.9 | 3 | 4 | 21 |
| Posterior micronucleus, diameter | 3 | 3.1 | 3.2 | 0.3 | 0.1 | 8.8 | 2.4 | 3.5 | 21 |
| Macronuclear nodules, number | 2 | 2.0 | 2.0 | 0.0 | 0.0 | 0.0 | 2 | 2 | 21 |
| Micronuclei, number | 2 | 2.0 | 2.0 | 0.0 | 0.0 | 0.0 | 2 | 2 | 21 |
| Adoral membranelles, number | 24 | 24.0 | 24.0 | 1.4 | 0.3 | 6.0 | 22 | 28 | 21 |
| Frontal cirri, number | 3 | 3.0 | 3.0 | 0.0 | 0.0 | 0.0 | 3 | 3 | 21 |
| Buccal cirri, number | 1 | 1.0 | 1.0 | 0.0 | 0.0 | 0.0 | 1 | 1 | 21 |
| Frontoventral cirri, numberb | 4 | 4.0 | 40.0 | 0.0 | 0.0 | 0.0 | 4 | 4 | 21 |
| Postoral ventral cirri, number | 3 | 3.0 | 3.0 | 0.0 | 0.0 | 0.0 | 3 | 3 | 18 |
| Pretransverse ventral cirri, number | 2 | 2.0 | 2.0 | 0.0 | 0.0 | 10.7 | 2 | 3 | 21 |
| Transverse cirri, number | 5 | 4.9 | 5.0 | 0.3 | 0.1 | 6.1 | 4 | 5 | 21 |
| Left marginal cirri, number | 20 | 20.6 | 21.0 | 1.5 | 0.3 | 7.4 | 17 | 23 | 21 |
| Right marginal cirri, number | 19 | 20.6 | 21.0 | 1.8 | 0.4 | 8.6 | 16 | 24 | 21 |
| Dorsal kineties (without dorsomarginal kineties), number | 4 | 4.0 | 4.0 | 0.2 | 0.0 | 5.4 | 4 | 5 | 21 |
| Dorsomarginal kineties, number | 1 | 1.6 | 2.0 | 0.5 | 0.1 | 30.7 | 1 | 2 | 21 |
| Dorsal kineties, total number | 5 | 5.7 | 6.0 | 0.6 | 0.1 | 10.2 | 5 | 7 | 21 |
| Dorsal kinety 1, number of bristles | 8 | 9.6 | 10.0 | 0.8 | 0.2 | 8.5 | 8 | 11 | 21 |
| Dorsal kinety 2, number of bristles | 10 | 11.2 | 11.0 | 1.6 | 0.4 | 14.6 | 8 | 14 | 21 |
| Dorsal kineties 3 and 4, number of bristles | 14 | 11.8 | 12.0 | 1.6 | 0.4 | 13.5 | 8 | 14 | 20 |
| Dorsal kinety 5, number of bristles | 6 | 6.7 | 7.0 | 1.0 | 0.2 | 15.2 | 4 | 8 | 21 |
| Dorsal kinety 6, number of bristlesc | 0 | 1.2 | 1.0 | 0.4 | 0.1 | 32.5 | 1 | 2 | 13 |
| Dorsal bristles, total number | 38 | 39.4 | 40.0 | 5.1 | 1.1 | 12.9 | 24 | 48 | 21 |
| Caudal cirri, number | 3 | 3.1 | 3.0 | 0.3 | 0.1 | 9.7 | 3 | 4 | 21 |
a
All data are based on protargol-impregnated specimens. Measurements in μm. AE, anterior end of cell; CV, coefficient of variation in %; HT, holotype specimen (also included in the sample n); M, median; Max, maximum; Mean, arithmetic mean; Min, minimum; n, number of specimens investigated; PE, posterior end of cell; SD, standard deviation; SE, standard error of arithmetic mean.
b
This group is composed of the frontoterminal cirri (VI/3, VI/4), the parabuccal cirrus (III/2), and cirrus IV/3 (e.g. Fig. 1f).
c
Specimens with lacking dorsal kinety 6 (e.g. holotype) not included.