Mueller's silk moss
- kingdom: Plantae
- phylum: Bryophyta
- class: Bryopsida
- order: Hypnales
- family: Plagiotheciaceae
- genus: Isopterygiopsis
- species: Isopterygiopsis muelleriana
Port Hawkesbury- Windsor
Nova Scotia
Canada
Sande
Vestfold
Norway
Manchester- Middletown
Connecticut- Alpine
- Closter
- Demarest
- Harrington Park
- Norwood
New Jersey- Suffern
New York- Birchwood Lakes
Pennsylvania
United States