Tropochasca petiti Olsson, 1967
Statigraphy: Pinecrest Sand Member of the Tamiami Formation
Location: SMR Phase 10 Pit, Sarasota County, Florida USA.
Notes: Resembles a Echinofulgur but with a more compact body, shorter spire and twisted siphonal canal suggesting Melongenidae. An extinct genera with no modern analog to compare with.