Position in a system
| system | Vitae - living organisms |
| domain | Eukaryota Whittaker & Margulis, 1978 - lifeforms with nucletic cells |
| superregnum | Bikonta - bikonts |
| Corticata | |
| Archaeplastida | |
| kingdom | Plantae Haeckel - plants |
| divisio | Bryophyta A. Braun - mosses |
| subdivisio | Bryophytina Engler |
| class | Polytrichopsida Doweld |
| order | Polytrichales M. Fleisch. |
| family | Polytrichaceae Schwägr. |
| genus | Atrichum P. Beauv. - atrichum moss |
| species | Atrichum tenellum (Röhl.) Bruch & Schimp. - Atrichum Moss |