Urospora penicilliformis
- kingdom: Plantae
- phylum: Chlorophyta
- class: Ulvophyceae
- order: Ulotrichales
- family: Ulotrichaceae
- genus: Urospora
- species: Urospora penicilliformis
Nortorf
Schleswig-Holstein
Germany
Vlissingen
Zeeland
Netherlands- United Kingdom
Dutch Harbor
Unalaska
Alaska
Pacifica
California
Nahant
Massachusetts
Minneapolis
Minnesota
Coos Bay
North Bend
Oregon
Narragansett Pier
Newport
Rhode Island
Friday Harbor
Washington
United States
Victoria
Varberg
Bembridge