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 | Bryopsida Rothm. |
| subclass | Dicranidae Doweld |
| order | Pottiales M. Fleisch. |
| family | Pottiaceae Schimp. |
| genus | Pseudocrossidium Williams - pseudocrossidium moss |
| species | Pseudocrossidium obtusulum (Lindb.) Crum & Anderson - Pseudocrossidium Moss |