Ischnochiton papillosus
- kingdom: Animalia
- phylum: Mollusca
- class: Polyplacophora
- order: Chitonida
- family: Ischnochitonidae
- genus: Ischnochiton
- species: Ischnochiton papillosus
Puerto Limón
Limón
Costa Rica
Saint James City
Florida- Port Aransas
- Port Isabel
Texas
United States
Saint Croix
Saint Croix Island
Virgin Islands, U.S.