Megatrema madreporarum
- kingdom: Animalia
- phylum: Arthropoda
- class: Maxillopoda
- order: Sessilia
- family: Pyrgomatidae
- genus: Megatrema
- species: Megatrema madreporarum
Saint Croix
Saint Croix Island
Virgin Islands, U.S.
Megatrema madreporarum Saint Croix