Lophosiphonia obscura
- kingdom: Plantae
- phylum: Rhodophyta
- class: Florideophyceae
- order: Ceramiales
- family: Rhodomelaceae
- genus: Lophosiphonia
- species: Lophosiphonia obscura
Duncan Town
Ragged Island
BahamasHamilton
Hamilton city
BermudaManchioneal
PortlandRunaway Bay
St Ann
JamaicaEnewetak
Enewetak Atoll
Marshall IslandsPorto
Porto
PortugalGáldar
Canary Islands
SpainKey West
Saint Augustine
FloridaNewport
Rhode Island
United States