In addition to the 69 ecological groups distinguished by Runhaar et al. (1987)¹ the authors present species lists of another 8 groups: 4 groups of epilithic ecotope types (, 3 of epiphytic ecotope types (E..ef), and 1 of decaying wood (E..rh). For 58 of the ‘old’ groups they present new lists of species of mosses and liverworts. Ecological group E02ef (epiphytes of neutral bark) has no less than 68 species of mosses and liverworts; more than half the number of ecological groups contain less than 10 moss species.