| Criterias | Nomenclature | Commentaries |
| 1 | monad | when they are tightly lumped together , it is mainly due to their proximities on the stick paper |
| 2 | form: prolate | elongated in form; the main measured length is about 35 µm |
| 3 | isopolar | anisopolarity, when it exists, is an artefact due to differential dryness or compression effect |
| 4 | medium | their lengths are between 26 and 50 µm |
| 5 | perprolate | the mean measured width is of about 15 µm, but this measurement is greatly dependent on dryness. The ratio between polar (DP) and equatorial (DE) diameters = 2.3 |
| 6 | sulcus: sulcate | at least one long longitudinal sulcus is observed in equatorial views |
| 7 | trisulcated | three sulcis, for observations in combination |
| 8 | porus: pore | one voluminous pore in equatorial position, located on the corresponding sulcus |
| 9 | tripored | one such pore, for each sulcus |
| 10 | heteroapertured | because it is trisulcated and tripored |