Lophosiphonia obscura
- kingdom: Plantae
- phylum: Rhodophyta
- class: Florideophyceae
- order: Ceramiales
- family: Rhodomelaceae
- genus: Lophosiphonia
- species: Lophosiphonia obscura
Duncan Town
Ragged Island
Bahamas
Hamilton
Hamilton city
Bermuda
Manchioneal
Portland
Runaway Bay
St Ann
Jamaica
Enewetak
Enewetak Atoll
Marshall Islands
Porto
Porto
Portugal
Gáldar
Canary Islands
Spain
Key West
Saint Augustine
Florida
Newport
Rhode Island
United States