Busycoarctum tropicalis (Petuch, 1994)
Stratigraphy: Pinecrest Sand Member of the Tamiami Formation
Location: SMR Phase 10 Pit, Sarasota County, Florida USA.
Notes: Sub adults of this species have been identified as Busycoarctum rapum while adults resemble Busycoarctum maximum. Heilprin (1886) in his description of B. rapum stated that it is a smooth shell lacking shoulder spines. B. tropicalis is more heavily striated with shoulder spines suggesting a different species.